================================================================================
Block 1 --- INPCOM --- Channel-Independent Options and Integer Input
================================================================================

.. default-role:: sasinp

.. sasblock:: INPCOM 1

.. sasinp:: NCHAN
	:location: 1

	Number of core channels. Maximum = 22000. (not to be confused with
	the bypass channels of PRIMAR-4). `NCHAN` must be less than or equal
	to NCH from the data allocation record.

.. sasinp:: IDBUG0
	:location: 2

	Channel independent debug flag.

	| = 0, No debugging prints.
	| > 0, Steady-state debug prints and transient time step prints.
	| = 2, Steady state coolant debug prints.
	| = 3, More steady state coolant debug prints.

.. sasinp:: IFUEL1
	:location: 3

	Number of fuel types (Max. = 8).

	Note that the MFUEL model (\ `IFUELO` = 2) does not use the fuel types defined
	by the PMATCM input block.

.. sasinp:: ICLAD1
	:location: 4

	Number of cladding types (Max. = 3).

.. sasinp:: IPLUP
	:location: 5

	Fission gas plenum location:

	| = 0, Fuel-pin gas plenum above the core.
	| = 1, Fuel-pin gas plenum below the core.

	Note that `IPLUP`\ = 0 is required for the MFUEL model (\ `IFUELO` = 2).

.. sasinp:: IPROPT
	:location: 6

	DEFORM-4 printed output selection option.

	| = 0, Use time steps to control printing.
	| = 1, Use absolute times based on `PRTSTR` and `PRTDEL` as well as time steps to control printing.

.. sasinp:: ITKEL
	:location: 7

	Temperature scale for SSPRNT and TSPRNT print routines and TSPLOT plotting routine.

	| = 0, Temperatures in Kelvins.
	| > 0, Temperatures in degrees centigrade.

.. sasinp:: IPOWER
	:location: 8

	Power driver option.

	| = 0, External reactivity vs. time from PREA subroutine or table. Total reactivity is the sum of the external reactivity and the internally-calculated feedback reactivity.
	| = 1, Power vs. time from PREA subroutine or table.

.. sasinp:: IPOWOP
	:location: 9

	Power option.

	| = 0, Steady-state power in the peak axial segment is calculated from total reactor power (See `POWTOT`\ ).
	| > 0, Steady-state total reactor power is calculated from the peak axial segment . (See `POW`\ ).

.. sasinp:: NPK
	:location: 10

	Reactor neutronics option.

	| = 0, Point kinetics with input perturbation theory reactivity worth tables.
	| = 1, Point kinetics with DIF3D (finite difference) calculated perturbation theory reactivity worth tables.
	| = 2, DIF3D-K or VARIANT-K nodal space-time neutronics using direct solution.
	| = 3, DIF3D-K nodal point kinetics with first order perturbation theory reactivity feedbacks.
	| = 4, DIF3D-K nodal point kinetics with adiabatic reactivity feedbacks.
	| = 5, DIF3D-K or VARIANT-K nodal space-time neutronics using improved quasi-static method.

.. sasinp:: MAXSTP
	:location: 11

	Maximum number of main (power and reactivity) time steps in transient calculation.

	| = 0, Steady-state calculation only.
	| > 0, Maximum number of time steps in the transient calculation.
	| = -1, Do not limit the number of times steps in the transient calculation.

.. sasinp:: IPO
	:location: 12

	Number of main (power and reactivity) time steps between full printouts before `IBLPRT` or coolant boiling (See `IBLPRN`\ ).

.. sasinp:: IPOBOI
	:location: 13

	Number of main (power and reactivity) time steps between full printouts after `IBLPRT` or coolant boiling.

.. sasinp:: IBLPRT
	:location: 14

	Main time step number for switch of full printout interval from `IPO` to `IPOBOI`\ . If `IBLPRT` = 0, switch occurs at coolant boiling inception.

.. sasinp:: NSTEP
	:location: 15

	Restart file save option. For any nonzero value of `NSTEP`, the restart file is saved at the end of the steady-state calculation and when the transient simulation ends with either the maximum problem time, `TIMAX`\, or the maximum number of time steps, `MAXSTP`\.

	| = 0, Do not save the restart file.
	| < 0, Only save the restart file following completion of the steady-state and transient simulations.
	| > 0, Save the restart file every `NSTEP` main time steps during the transient, in addition to saving the restart file following completion of the steady-state and transient simulations.

.. sasinp:: NDELAY
	:location: 16

	Number of delayed neutron precursor families,

	0 ≤ `NDELAY` ≤ 6.

.. sasinp:: NDKGRP
	:location: 17

	Number of decay heat groups. 0 ≤ `NDKGRP` ≤ 24

	The number of decay heat groups defined for any given curve may not exceed `NDKGRP` (except as noted below for `NDKGRP` = 0) but may be less than `NDKGRP`\ . This allows standard curves to be combined with user-supplied curves with a lower expansion order.

	Decay heat calculations can be disabled by setting `NDKGRP` = 0 even if other decay heat input is present.

.. sasinp:: NPREAT
	:location: 18

	Power or reactivity option

	0 ≤ `NPREAT` ≤ 20, Number of entries in PREA vs. time table (See `IPOWER`\ , `PREATB`\ , and `PREATM`\ ).

	| > 20, ID for function of power or reactivity (see `IPOWER`\ , FUNCTION Block)

.. sasinp:: NPRES
	:location: 19

	Coolant driving pressure option.

	| = 0, The exponential decay of pump head is used (see `PDEC`\ , `PDEC1`\ , `PDEC2`\ ).
	|
	| 0 < `NPRES` ≤ 20, Number of entries in table of coolant driving pressure or normalized coolant flow rate vs. time (see `IFLOW`\ , `PRETAB`\ , `PRETME`\ ).
	|
	| > 20, ID for function of coolant driving pressure or normalized coolant flow rate (see `IFLOW`\ , FUNCTION Block).

.. sasinp:: IFLOW
	:location: 20

	Used only if `IPRION` ≠ 4, `NPRES` > 0. If `IFLOW` = 0 and `IPRION` ≠ 4, then the coolant driving head is specified as a function of time. If `IFLOW` > 0, `IFLOW` is the channel number in which coolant flow is specified as a function of time.

.. sasinp:: NONEU0
	:location: 21

	Reserved for space-time options.

.. sasinp:: NT0TAB
	:location: 22

	Coolant inlet temperature

	0 ≤ `NT0TAB` ≤ 20, Number of entries in `T0TAB` vs. `T0TME` table, i.e., coolant inlet temperature vs. transient time table.

	| > 20, ID for function of coolant inlet temperature (See FUNCTION Block)

.. sasinp:: MULSTR
	:location: 23

	Multiple restart option.

	| = 0, Normal restart option: Restarts written at multiples of `NSTEP`\ . Only the latest restart file is saved.
	| = 1, Multiple restart option: Restarts written at multiples of `NSTEP`\ . All restart files are concatenated. Not recommended.

.. sasinp:: ICLCMP
	:location: 24

	Core channel plotting option.

	| = 0, Data for plots of transient not saved.
	| > 0, Data output to CHANNEL.dat for transient plotting. See also `MSTPLA`\ , `MSTPLB`\ , `MSTPL1`\ , `MSTPL2`\ , and `MSTPL3`

.. sasinp:: INEDIT
	:location: 25

	Input edit option.

	| = 0, No input edit.
	| > 0, Input edit to standard output.

.. sasinp:: IYLD
	:location: 26

	Cladding flow stress formulation.

	| = 0, Based on TID-26666
	| = 1, DiMelfi - Kramer strain, strain-rate, temperature, and fluence dependent model.
	| = 2, Same as 1, but with high strain rate approximation.
	| = 3, Input table `YLDTAB`\ .

	Note that `IYLD`\ = 3 is required for the MFUEL model (\ `IFUELO` = 2).

.. sasinp:: IPRION
	:location: 27

	PRIMAR-4 option.

	| = 4, For PRIMAR-4 option.
	| ≠ 4, For PRIMAR-1 option.

.. sasinp:: IMELTV
	:location: 28

	Axial extent assumptions for the molten cavity pressure calculation.

	| = 0, Extends only over axial extent of melting.
	| = 1, Cavity includes all central cavity.
	| = 2, Each axial node treated as separate cavity.

.. sasinp:: INAS3D
	:location: 29

	Alkali metals coolant properties. (Overridden by `ID2O`\ , `IPBDEN`\ , `KPROPI`\ , and `ICLPRP`\ ).

	| = 0, For SAS4A sodium properties.
	| > 0, For SAS3D sodium properties.
	| < 0, For NaK properties.

.. sasinp:: NCLADM
	:location: 30

	Not currently used.

.. sasinp:: ICREXP
	:location: 31

	Control rod drive expansion option

	| = 0, No control rod drive expansion feedback.
	| = 1-3, Calculate feedback from single-node model. (Option 2 switches on CRD output in older decks, but use of `ICRDDB` flag to control output is recommended).
	| = 4, Calculate feedback from multinode model.

.. sasinp:: IXSTPC
	:location: 32

	Controls when the DEFORM computed axial expansion calculation is stopped based on cladding conditions.

	| = 0, Continues.
	| = 1, Inner cladding node temperature > `TESOL`\ (\ `ICLADV`\ ).
	| = 2, Inner two cladding nodes temperature > `TESOL`\ (\ `ICLADV`\ ).
	| = 3, All cladding nodes temperature > `TESOL`\ (\ `ICLADV`\ ).

.. sasinp:: IXSTPF
	:location: 33

	Controls when the DEFORM computed axial expansion calculation is stopped based on fuel melt percentage molten.

	| = 0, Continues.
	| > 0, Percent molten (0 < `IXSTPF` <= 100).

.. sasinp:: IMCVTY
	:location: 34

	Controls how much crack volume is included in the volume of the molten cavity. See `IROR`.

.. sasinp:: IDBPWI
	:location: 35

	| = 0, No debug print for POWING subroutine.
	| = 1, Debug print for POWING subroutine.

.. sasinp:: IRADEX
	:location: 36

	Radial expansion feedback option.

	| = 0, No radial expansion feedback.
	| > 0, Radial expansion feedback using the inlet coolant temperature.
	| < 0, Radial expansion feedback using the inlet plenum wall temperature.

	Simple radial expansion model

	| =1,-1 Calculate radial expansion reactivity feedback only.
	| =2,-2 Print the radial expansion reactivity feedback, inlet temperature and average structure temperature every time step.
	| =3,-3 Print debug.

	Detailed radial expansion model

	| =4,-4 Print the radial expansion reactivity feedback, inlet temperature and average structure temperature every time step.
	| =5,-5 Print axial core shape, net deflection, and radial expansion with curve, plus debug, every time step.
	| =6,-6 FFTF core restraint design. See ANL/RAS 88-6 for consistent set of data. See program listing for additional cautions.
	| =7,-7 FFTF core restraint design, print axial core shape, net deflection, and radial expansion with curve, plus debug, every time step.

.. sasinp:: KFAILP
	:location: 37

	| = 0, Mechanistic axial pin failure propagation in PLUTO2 and LEVITATE. (See `FNARME`).
	| = 1, Axial pin failure propagation determined by input. (See `TEFAIL`\ , `FNARME`\ , and `PRFAIL`).

.. sasinp:: NCPLEV
	:location: 38

	Switch from PLUTO2 to LEVITATE when `NCPLEV` axial cladding nodes have exceeded the cladding liquidus temperature.

	Suggested value: 3.

	`NCPLEV` = 0: Do not switch from PLUTO2 to LEVITATE due to cladding melting.

	A switch from PLUTO2 to LEVITATE occurs automatically if all fuel and cladding in the pin are molten in any axial node.

.. sasinp:: NFUELD
	:location: 39

	Number of dollars of fuel reactivity to terminate the calculation. Recommended value: -5.                                                                                                                                                                         |             | PL,LE         |

.. sasinp:: IAREXT
	:location: 40

	Controls radial extent of integration when calculating the plain strain axial expansion.

	| = 0, Over the solid fuel annulus.
	| = 1, Over all the fuel, both solid and molten.

.. sasinp:: NOREAC
	:location: 41

	Reactivity print option.

	| = 0, Full output from PSHORT.
	| > 0, Full output from PSHORT every `NOREAC` main time steps.

.. sasinp:: NSLEEX
	:location: 42

	Number of fully molten hexcan cells in a subassembly to terminate the calculation.

.. sasinp:: NSRMTB
	:location: 43

	Not currently used.

.. sasinp:: INRAEJ
	:location: 44

	| = 0, Parametric fuel injection calculation. (See `CIPINJ`\)
	| = 1, Ejection of in-pin fuel is calculated using a mechanistic model.

.. sasinp:: NPOWDK
	:location: 45

	Number of power curves or sets of user-defined decay heat curves used. 0 ≤ `NPOWDK` ≤ 5

	For `IPOWER` = 0, `NPOWDK` defines the number of user-defined decay heat curves to expect in the input. (Do not count any built-in ANS standard curves that are used in the problem.) `NPOWDK` should be zero when using the original (Version 1.0) decay heat input.

	For `IPOWER` = 1, `NPOWDK` defines the number of user-supplied power vs. time tables. This usage is unrelated to the decay heat model.

.. sasinp:: NPDKST
	:location: 46

	Number of entries in the `POWLVL` vs. `POWTIM` and `PWLVL2` vs. `PWTIM2` tables for performing steady-state initialization of the decay heat precursors.

	0 ≤ `NPDKST` ≤ 8

	If `NPDKST` = 0, infinite steady-state irradiation is assumed for all decay heat regions regardless of the input in `POWLVL`\ /\ `POWTIM` and `PWLVL2`\ /\ `PWTIM2`\ .

.. sasinp:: ICHUNK
	:location: 47

	| = 0, The chunk model in LEVITATE is not used.
	| = 1, The chunk model in LEVITATE is used.

.. sasinp:: ILUBLK
	:location: 48

	| = 0, Inhibit chunk formation due to bulk freezing of the fuel.
	| = 1, Allow chunk formation via bulk freezing if no solid support for chunk formation is present.

.. sasinp:: INAPN
	:location: 49

	Sodium vapor pressure treatment.

	| = 0, No sodium vapor pressure in the fuel pin cavity.
	| = 1, Sodium vapor pressure is considered in the fuel pin cavity.

.. sasinp:: NOEQPN
	:location: 50

	Controls the pressure in the molten cavity at the time of PINACLE initiation.

	| = 0, The pressure in the cavity is equal to the DEFORM calculated pressure. If the input `PCFAIL` > 1.0, the pressure is set equal to `PCFAIL`\ .
	| = 1, The pressure in the cavity is calculated using the available fission gas.

**LOCATIONS 51-54 USED ONLY IF \|IRADEX\| > 3**

.. sasinp:: NSUBTC
	:location: 51

	Total number of subassemblies in the active core region, including control and internal blanket subassemblies. Used for calculating the core radius in the radial expansion reactivity feedback calculation.

.. sasinp:: MTGRD
	:location: 52

	Support grid material, used for calculating the thermal expansion of the grid during a transient.

	| = 1, 316 SS.
	| = 2, HT-9.

.. sasinp:: MTACLP
	:location: 53

	Above-core load pad material. Used for calculating the thermal expansion of the above-core load pad during a transient.

	| = 1, 316 SS.
	| = 2, HT-9.

.. sasinp:: MTTLP
	:location: 54

	Top load pad material, used for calculating the thermal expansion of the top load pad during a transient.

	| = 1, 316 SS.
	| = 2, HT-9.

.. sasinp:: MODEEX
	:location: 55

	Axial expansion option.

	| = 0, Force balance or free expansion, depending on radial gap.
	| = 1, Cladding controlled fuel expansion.
	| = 2, Independent free expansion.
	| = 3, Force balance all the time.

.. sasinp:: JREEXT
	:location: 56

	| = 0, No correction term.
	| = 1, Add correction term to reactivity extrapolation.

.. sasinp:: IFT19
	:location: 57

	Not currently Used.

.. sasinp:: IREACT
	:location: 58

	Reactivity feedback model option.

	| = 0, Use detailed reactivity models.
	| = 1, Use FFTF empirical reactivity model.
	| = 2, Use EBR-II empirical reactivity model.
	| = -1 Compute, write out but do not use FFTF model.
	| = -2 Compute, write out but do not use EBR-II model.

**LOCATIONS 59-65 USED ONLY IF \|IRADEX\| > 3**

.. sasinp:: NSUBTR
	:location: 59

	Total number of subassemblies in the reactor, including drivers, radial and internal blankets, control assemblies, radial reflectors and shields.

.. sasinp:: NRRNGS
	:location: 60

	Number of restraint rings in core restraint design.

	| = 0, No restraint rings.
	| = 1, Restraint ring at top load pad only.
	| = 2, Restraint rings at top and above-core load pads.

.. sasinp:: MTRRAC
	:location: 61

	Material of the restraint ring at the above-core load pad elevation.

	| = 1, 316 SS.
	| = 2, HT-9.

.. sasinp:: MTRRT
	:location: 62

	Material of the restraint ring at the top load pad elevation.

	| = 1, 316 SS.
	| = 2, HT-9.

.. sasinp:: MTRFAC
	:location: 63

	Radial reflector and/or blanket above-core load pad material.

	| = 1, 316 SS.
	| = 2, HT-9.

.. sasinp:: MTRFT
	:location: 64

	Radial reflector and/or blanket top load pad material.

	| = 1, 316 SS.
	| = 2, HT-9.

.. sasinp:: IROPT
	:location: 65

	Assumption for low power-to-flow ratios.

	| = 0, Subassemblies vertical at the grid plate.
	| = 1, Above-core load pads remain compacted (most pessimistic).

.. sasinp:: JCRIND
	:location: 66

	For use with EBR-II reactivity model only.

	This is the lowest node in which the control rod is present in the special EBR-II control rod feedback model. Sums then run from `JCRIND` to the top of S/A.

.. sasinp:: ID2O
	:location: 67

	Heavy water coolant properties.

	(Overridden by `IPBDEN`\ , `KPROPI`\ , and `ICLPRP`\ ).

	| = 0, Na or NaK properties (See `INAS3D`\ ).
	| = 1, D2O properties.

.. sasinp:: IDNFLW
	:location: 68

	| = 0, For initial upflow through the core.
	| = 1, For initial downflow through the core.

.. sasinp:: IPLTSG
	:location: 69

	Number of main time steps between saving plot data for the steam generator model.

.. sasinp:: IBOP
	:location: 70

	Balance of plant modeling option.

	| = 0, If balance-of-plant model is not used.
	| = 1, If balance-of-plant model is used.
	
	When the balance of plant model is activated, steam generators do not participate in the null transient. 

.. sasinp:: ICRDDB
	:location: 71

	Control rod drive expansion print option.

	| = 0, No output from control rod drive expansion model.
	| = 1, Regular CRD output every main time step.
	| = 2, Additional debug output every PRIMAR time step.

.. sasinp:: ICRTMP (K)
	:location: 72-74

	Specifies the environment temperature for section K of the control rod drive for `ICREXP` = 2. If = 0, the UIS temperature is used. If > 0, the temperature of compressible volume `ICRTMP` is used.


.. sasinp:: ICRNOD (K)
	:location: 75-77

	Number of axial nodes per section of CRD.


.. sasinp:: NSEGCR
	:location: 78

	Number of PRIMAR4 segment representing control rod assemblies.

.. sasinp:: ICHCHT
	:location: 79

	Not currently Used.

.. sasinp:: NOEQLE
	:location: 80

	Controls the pressure in the molten cavity at the time of LEVITATE or PLUTO2 initiation.

	| = 0, The pressure in the cavity is equal to the DEFORM calculated pressure. If the input `PCFAIL` > 1.0, the pressure is set equal to `PCFAIL`\ .
	| = 1, The pressure in the cavity is calculated using the available fission gas.

	If LEVITATE or PLUTO2 are initiated after PINACLE, the pressure is always equal to the PINACLE pressure and `NOEQLE` is not relevant.

.. sasinp:: MTCB
	:location: 81

	Core barrel material.

	| = 1, 316 SS.
	| = 2, HT-9.

.. sasinp:: KDEBUG
	:location: 82

	| = 0, No EBR-II routine debug.
	| = 1, Turns on EBR-II routine debug.

.. sasinp:: KEBRS1
	:location: 83

	Main time step number to turn EBR-II routine debugging on.

.. sasinp:: KEBRS2
	:location: 84

	Main time step number to turn EBR-II routine debugging off.

.. sasinp:: IDBDKH
	:location: 85

	Reserved for future decay heat modeling.

.. sasinp:: NULLD3
	:location: 86

	Number of flux shape calculations in addition to the initial cold solution in the steady state power distribution/thermal hydraulics iteration for `NPK` > 0.

.. sasinp:: ISSNUL
	:location: 87

	Number of time steps in the steady-state null transient for core channel thermal hydraulics.

	If `ISSNUL`\ =0, no null transient.

	Note: `ISSNUL`\ >0 is required if the multiple pin option is used (\ `JJMLTP`\ >0).

.. sasinp:: IPRSNL
	:location: 88

	If `ISSNUL`\ >0, then print out temperatures every IPRSNL time steps of the null transient.

.. sasinp:: NOFDBK
	:location: 89

	Transient reactivity feedback option for NPK=0.

	| = 0, Use subroutine FEEDBK for transient reactivity feedbacks.
	| > 0, Do not calculate transient reactivity feedback with subroutine FEEDBK.

.. sasinp:: IBOPLT
	:location: 90

	Balance-of-plant plotting file option.

	| = 0, Do not call subroutine LBPLOT.
	| > 0, Main time step frequency for writing BOP plotting file from subroutine LBPLOT.

.. sasinp:: ISIMPG
	:location: 91

	Graphical interface for simulator application.

	| = 0, No graphical interface.
	| = 1, Graphical interface for EBR-II. Some card-image input will be overridden interactively by values from graphical interface. SASSYS-1 is invoked by the graphical interface, not directly by the user. Usage instructions are in ANL-FRA-171.

.. sasinp:: KHDBK
	:location: 92

	Print flag for messages if any extrapolation of the IFR handbook data is used. Only for `IMETAL`\ =2, `IRHOK`\ =1 and `IFUELM`\ =0.

	| = 0, Print messages.
	| = 1, Do not print messages.

.. sasinp:: KFIRR
	:location: 93

	Correction option for irradiation effect on metal fuel thermal conductivity.

	| = 0, Empirical correction based on average fuel burnup (See `BURNFU`\ ).
	| = 1, Theoretical correction based on porosity and sodium logging of fuel radial node. (See `PRSTY` and `XLOGNA`\ ).

.. sasinp:: KDENBU
	:location: 94

	Option for correction of U-Pu-Zr alloy fuel theoretical density for the presence of fission products, based on average fuel burnup and fabricated composition (See `BURNFU`\ , `WUREF`\ , `WPUREF`\ , `WZRREF`\ ). Only for `IMETAL` = 2, `IRHOK` = 1, and `IFUELM` = 0.

	| = 0, No correction for fission products.
	| = 1, Make correction for fission products.

.. sasinp:: IFIT (K)
	:location: 95-100

	Input table look-up options.

	`IFIT`\ :

	| = 0, Linear fit.
	| = 1, Third order fit.
	| = 2, Third order fit with slope discontinuities if: X(J+1) - X(J) < 0.001.
	| = 3, Linear fit to log(Y).
	| = 4, Third order fit to log(Y).
	| = 5, Third order fit to log(Y) with slope discontinuities.

	K:

	| = 1, Power vs. time or user specified reactivity vs. time curves (\ `PREATB`\ , `PRETB2`\ ).
	| = 2, PRIMAR-1 pump head vs. time or channel flow vs. time.
	| = 3, PRIMAR-1 inlet temperature vs. time.
	| = 4, PRIMAR-4 pump head, motor torque, or pump speed vs. time.
	| = 5, Reserved for future use.
	| = 6, Reserved for future use.

.. sasinp:: IPIC
	:location: 101

	PINACLE/LEVITATE pin picture plot flag.

	| = 0, No plot data on unit 19.
	| = 1, Plot data written on unit 19.

.. sasinp:: IBOWTP
	:location: 102

	Temperature flag in EBR-II bowing reactivity.

	| = 0, Normalized core temperature rise based on upper plenum temperature.
	| = 1, Normalized core temperature rise based on average coolant temperature in fueled channels.

.. sasinp:: ITARGE
	:location: 103

	Not currently used.

.. sasinp:: IEMGEM
	:location: 104

	FFTF Gas Expansion Module (GEM) model.

	| = 0, Not used.
	| > 0, Invoke FFTF GEM model.

.. sasinp:: NEXSO
	:location: 105

	Number of entries in `EXSOTB`\ /\ `EXSOTM` point kinetics external source table (Max. 20).

.. sasinp:: IPBDEN
	:location: 106

	Heavy liquid metal coolant thermophysical properties. (Overridden by `KPROPI` and `ICLPRP`\ ).

	| = 0, Coolant properties determined by `INAS3D` and `ID2O`\ .
	| = 1, Use Pb coolant thermophysical properties.
	| = 2, Use Pb (44.5%)-Bi (55.5%) eutectic thermophysical properties.

.. sasinp:: MSTPLA
	:location: 107

	Transient time step for change of plotting data output frequency from `MSTPL1` to `MSTPL2`\ .

.. sasinp:: MSTPLB
	:location: 108

	Transient time step for change of plotting data output frequency from `MSTPL2` to `MSTPL3`\ .

.. sasinp:: MSTPL1
	:location: 109

	Transient time step plotting data output frequency before time step `MSTPLA`\ .

.. sasinp:: MSTPL2
	:location: 110

	Transient time step plotting data output frequency after time step `MSTPLA` and before time step `MSTPLB`\ .

.. sasinp:: MSTPL3
	:location: 111

	Transient time step plotting data output frequency after time step `MSTPLB`\ .

.. sasinp:: KTREAT
	:location: 112

	TREAT modeling flag.

	| = 0, Use standard modeling.
	| > 0, Use special TREAT modeling.(Air properties for coolant, constant coolant flow rates).

.. sasinp:: KQSCRA
	:location: 113

	Modeling option for external source with scram.

	| = 0, Trip external source at time TSCRAM+DELSCR.
	| = 1, Hold external source at constant value after TSCRAM+DELSCR.
	| = 2, Continue external source according to `NEXSO`\ , `EXSOTB`\ , `EXSOTM` specifications after TSCRAM+DELSCR. If NEXSO = 0, the external source is held at the initial steady-state value set by `RHOZRO`\ .

.. sasinp:: KPROPI
	:location: 114

	Coolant thermophysical properties correlation coefficients. (Overridden by `ICLPRP`\ ).

	| = 0, Use default coefficients defined by `INAS3D`\ , `ID2O`\ , `IPBDEN`\ , or `ICLPRP`\ .
	| > 0, Input correlation coefficients in `APROPI`.

.. sasinp:: ISCH
	:location: 115

	Coolant channel thermal-hydraulics model option.

	| = 0, Use single-pin model.
	| > 0, Use detailed coolant sub-channel model.

.. sasinp:: ISKDOT
	:location: 116

	Input data printing option.

	| = 0, Print data as input, and also print the full input data file as stored in memory (DATOUT).
	| > 0, Skip the DATOUT print, do not recapitulate the input data.

.. sasinp:: NLINMX
	:location: 117

	Printed output line limit, in thousands of lines, for the printed output file.

	No longer used.

.. sasinp:: ICLPRP
	:location: 118

	Coolant material properties used in the core and all of PRIMAR except for the DRACS loops.

	| = 0, Correlation coefficients set by `INAS3D`\ , `ID2O`\ , `IPBDEN`\ , or `KPROPI`
	| = 1, For Na, SAS4A version.
	| = 2, For Na, SAS3D version.
	| = 3, For NaK.
	| = 4, For D2O.
	| = 5, For Pb.
	| = 6, For Pb-Bi.
	| = 7, For user-supplied property correlation coefficients set by `APROPI`\.

	Note: If `ICLPRP` > 0, then `ICLPRP` overrides `INAS3D`, `ID2O`, `IPBDEN`, and `KPROPI`. See `INAKDR` for the DRACS loop properties.

.. sasinp:: IFT1TM
	:location: 119

	Output flag for printing maximum core channel temperature data to auxiliary output file MaxTemps.txt.

	| = 0, Do not write maximum core channel temperature data.
	| > 0, Write maximum core channel temperature data every `IFT1TM` time steps.

.. sasinp:: IVIS3D
	:location: 120

	3D visualization data output flag. Normally used for detailed sub-channel output.

	| = 0, Do not write visualization data.
	| > 0, Write visualization data every `IVIS3D` time steps.

.. sasinp:: INPDU2
	:location: 121-250

	Not currently used.