================================================================================
Block 11 --- OPCIN --- Channel-Independent Floating-Point Input
================================================================================

.. default-role:: sasinp

.. sasblock:: OPCIN 11

.. sasinp:: EPSTEM
	:location: 1
	:units: K

	Steady-state temperature convergence delta. The steady-state temperatures in the fuel-pin must converge such that \|T' - T\| <= `EPSTEM`\ , where T' is the temperature on the last iteration and T is the temperature on the previous iteration.

	Suggested value: 0.1.

.. sasinp:: EPSREA
	:location: 2

	Not currently used.

.. sasinp:: EPSPOW
	:location: 3

	Neutron flux amplitude convergence criterion.

.. sasinp:: EPSGAM
	:location: 4

	Not currently used.

.. sasinp:: DT0
	:location: 5
	:units: s

	Initial and maximum main time step length.

.. sasinp:: DTMXB
	:location: 6
	:units: s

	Maximum heat-transfer time step length after coolant boiling inception.

	Suggested value: 0.01 s.

	Maximum value: 0.02 s.

.. sasinp:: TIMAX
	:location: 7
	:units: s

	Maximum problem time. Restart file is saved when time `TIMAX` is reached if `NSTEP`\ > 0.

.. sasinp:: REAITR
	:location: 8

	Not currently used.

.. sasinp:: TCOSTP
	:location: 9
	:units: s

	Number of CPU seconds reserved at end of run for writing of restart file when `NSTEP` > 0.

.. sasinp:: DTFUEL
	:location: 10
	:units: K

	Maximum fuel temperature change per heat-transfer time step.

	Suggested value: 50.0 for `IMETAL` = 0,

	5.0 for `IMETAL` > 0.

.. sasinp:: DTCLAD
	:location: 11
	:units: K

	Maximum cladding temperature change per heat-transfer time step.

	Suggested value: 30.0.

.. sasinp:: TCLMAX
	:location: 12

	Not currently used.

.. sasinp:: DTP0
	:location: 13
	:units: s

	Initial PRIMAR time step size.

.. sasinp:: DTPMAX
	:location: 14
	:units: s

	Maximum PRIMAR time step size before boiling starts.

.. sasinp:: DTPBOI
	:location: 15
	:units: s

	Maximum PRIMAR step size after start of boiling.

.. sasinp:: DTPLEV
	:location: 16
	:units: s

	Maximum PRIMAR step size after LEVITATE starts.

.. sasinp:: DTPFCI
	:location: 17
	:units: s

	Maximum PRIMAR step size after PLUTO-2 starts.

.. sasinp:: TPRFCI
	:location: 18
	:units: s

	Time after PLUTO-2 initiation when PRIMAR step can be increased to `DTPBOI`\ .

.. sasinp:: DPINMX
	:location: 19
	:units: Pa

	Maximum change in inlet pressure per PRIMAR step.

.. sasinp:: DTINMX
	:location: 20
	:units: K

	Maximum change in inlet temperature per PRIMAR step.

.. sasinp:: DTMMXB
	:location: 21
	:units: s

	Maximum main time step after the onset of boiling.

.. sasinp:: DPWMAX
	:location: 22

	Maximum fractional change in power per main time step, only used if `IPOWER`\ = 1.

.. sasinp:: ASCRAM
	:location: 23

	Not currently used.

.. sasinp:: PSCRAM
	:location: 24

	Normalized total power for scram initiation.

	Relevant for `IPOWER`\ =0, `NPK`\ =0.

.. sasinp:: GSCRAM
	:location: 25

	Not currently used.

.. sasinp:: DTSSCP
	:location: 26
	:units: s

	Time step size for the null transient to initialize component-component heat transfer in PRIMAR-4.

.. sasinp:: EPSSCP
	:location: 27

	Component-component heat transfer convergence criterion for the null transient.

.. sasinp:: DXMAPR
	:location: 28-87

	Not currently used.

.. sasinp:: DTNULL
	:location: 88
	:units: s

	Time step size for the null transient for steady-state core channel thermal hydraulics.

	Not used if `ISSNUL`\ =0.

.. sasinp:: TPCOST
	:location: 89
	:units: s

	Time to start writing PINACLE data for core image (PNPICO subroutine).

.. sasinp:: TPCOLE
	:location: 90
	:units: s

	Time to start writing LEVITATE data for core image (LEPICO subroutine).

.. sasinp:: TPCOEN
	:location: 91
	:units: s

	Time to stop writing data for core images.

.. sasinp:: DTPICP
	:location: 92
	:units: s

	Time interval for writing data for core images while PINACLE is active.

.. sasinp:: DTPICL
	:location: 93
	:units: s

	Time interval for writing data for core images while LEVITATE is active.

.. sasinp:: DTMMAX
	:location: 94
	:units: s

	Maximum main time step length. Default = `DT0`\ .

.. sasinp:: DTMIN (I)
	:location: 95-104
	:units: s

	Main time step table. `DTMIN`\ (I) is the length of the main time step to be used in the problem time interval from `TDTMIN`\ (I) to `TDTMIN`\ (I+1). For times before `TDTMIN`\ (1), `DT0` is used as the main time step. If J is the index of the last entry in the `DTMIN` table, then the main time step for times after `TDTMIN`\ (J) is `DTMIN`\ (J). If there are no entries in the `DTMIN` table, the automatic main time step selection algorithm will be used.

.. sasinp:: TDTMIN (I)
	:location: 105-114
	:units: s

	See `DTMIN` above.

.. sasinp:: TMAINS
	:location: 115-149
	:units: s

	Problem times for forced main time step termination.

.. sasinp:: DELSCR
	:location: 150
	:units: s

	Time delay after scram initiation (\ `ASCRAM`\ , `PSCRAM`\ , `GSCRAM`\ ) for scram reactivity table (\ `SCRTAB`\ , `SCRTME`\ ) application and for external source (\ `KQSCRA`\ ) changes.

.. sasinp:: DELPUM
	:location: 151
	:units: s

	Time delay after scram initiation (\ `ASCRAM`\ , `PSCRAM`\ , `GSCRAM`\ ) for beginning of `PUHALF` pump coastdown.

.. sasinp:: PUHALF
	:location: 152
	:units: s

	Flow halving time after TSCRAM+DELPUM.

	F(t)=F(0)/(1+t/\ `PUHALF`\ ), where t is the time after TSCRAM+DELPUM. Only for `IFLOW` > 0.

.. sasinp:: OPCDUM
	:location: 153-250

	Not currently used.

**DEFAULT VALUES**

.. list-table::
	:header-rows: 0
	:align: center
	:widths: auto

	* - `DTP0`
	  - 1.0
	* - `DTPBOI`
	  - 0.01
	* - `DTPLEV`
	  - 0.004
	* - `DTPFCI`
	  - 0.001
	* - `TPRFCI`
	  - 0.05
	* - `DPINMX`
	  - 25000.0
	* - `DTINMX`
	  - 5.0
	* - `DTPMAX`
	  - 1.0
	* - `DTMMXB`
	  - 0.02