13.4. Input-Output Description

A listing of CLAP-related input variables is given in Table 13.4.1 as an aid in preparing or modifying SAS input decks. Additionally, the input items on this list should be rechecked when problems are encountered in the running of SAS cases with cladding motion. This list contains all input items used directly by the following CLAP subroutines: TSCLD1, TSCLD2, SODFRC and DENSIT and, in addition, input items used to initiate CLAP and to calculate reactivity effects due to cladding motion (in subroutine FEEDBK).

The CLAP output appears with both the main full printout and the boiling printout. A sample output is shown in Figure 13.4.1. The output labels are generally self-explanatory. The Fortran variable and units corresponding to each output item are given in Table 13.4.2.

Table 13.4.1 Listing of CLAP-Related Input Parameters

Symbol	Reference Eq. No.	Reference	Block	Location	Recommended Values
$T_{\text{ref}}$	Eq. (13.2-46)	TR	13	419	1700 K
$T_{\text{m}}$	—	TESOL*	13	810-812	1700 K [13-7]
$\lambda^{o}$	Eq. (13.2-51)	UEMELT	13	816-818	2.703⨉105 J/kg [13-7]
$\lambda^{o}$	Eq. (13.2-51)	UEMELT	13	816-818	2.703⨉105 J/kg [13-7]
$C_{\text{ps}}$	Eq. (13.2-49)	CE	13	1070-1072	690.1 J/kg K [13-7]
		ICLADV	51	17	—
		ICLADB	51	85	1
		IDCLGO	51	125	0
		IDCLSP	51	126	0
		IDCLDE	51	127	0
$W_{\text{j}}$	Eq. (13.3-62)	CLADRA	62	160-183	—
$\rho_{\text{s}}^{o}$	Eq. (13.2-46)	DENSS	63	35	7.256⨉103 kg/m3† [13-7]
$C_{1}, C_{2}, C_{3}$	Eq. (13.2-33)	C1, C2, C3	64	3-5	Eq. (13.2-33) [13-8]
$\text{AFRV,BFRV}$	Eq. (13.2-5)	AFRV, BFRV	64	168, 169	0.316, -0.25
$\rho_{\text{c}}^{o}$	Eq. (13.2-47)	DENS	65	3	6.98⨉103 kg/m3† [13-7]
$\beta$	Eq. (13.2-46)	AE	65	4	2.3⨉10-5/K† [13-7]
$C$	Eq. (13.2-47)	RHOCD	65	5	8.3⨉10-5/K† [13-7]
$\mu_{\text{m}}$	Eq. (13.2-21)	VISMC	65	6	6.42⨉10-3 Pa-s [13-7]
$\mu_{\text{T}}$	Eq. (13.2-22)	VISTR	65	7	1⨉104 Pa-s [13-3]
$\mu_{\text{s}}$	Eq. (13.2-23)	VISSC	65	8	1⨉104 Pa-s [13-3]
$q$	Eq. (13.2-22)	XVISC	65	9	0.5
$b_{\text{f}}$	Eq. (13.2-19)	CLADFR	65	10	0.02 [13-3]
$(\text{Re})_{\text{break}}$	Eq. (13.2-18)	REBRK	65	11	[13-3]
$\varepsilon$	Eq. (13.2-10)	GMULTF	65	12	75.0 [13-5]
$\alpha_{\text{crit}}$	Eq. (13.2-10)	ALPHCR	65	13	0.0 [13-5]
$(\text{fps})_{\text{o}}$	Eq. (13.2-12)	FPSO	65	14	0.3s
$x$	Eq. (13.2-12)	EXPFPS	65	15	3.0
$\theta$	Eq. (13.3-46)	CLSTHR	65	17	1.0
$a$	Eq. (13.2-21)	AVISC	65	20	5492 K [13-7]
$c_{\text{pc}}$	Eq. (13.2-50)	CPC	65	21	621.7 J/kg K† [13-7]

*Orginally TME, but TME is now set equal to the solidus temperature TESOL.

†Evaluated at the melting temperature of 1700 K.

Table 13.4.2 Summary of CLAP Output Items

Item	Symbol	FORTRAN Variable	Units
CLAP Time Step Count	$n$	ICOUNT	—
Axial Coolant Mode	$j$	J	—
Main Axial (Nodal) Elevation	$z_{\text{m,j}}$	ZFM	m
Refrozen Cladding Thickness	$2\Delta r_{\text{s}}$	RCLAD1	m
Moving Cladding Thickness	$2\Delta r_{\text{c}}$	TCLAD1	m
Intact Cladding Temperature	$T_{\text{i}}$	TCLAV	K
Refrozen Cladding Temperature	$T_{\text{s}}$	TEMFS1	K
Moving Cladding Temperature	$T_{\text{c}}$	TEMMC1	K
Moving Cladding Velocity	$V_{\text{c}}$	CVEL1	m/s
Coolant Flow Area	$A_{\text{v}}$	AREAC1	m2
Internal Flag (=1 in molten zone, =0 otherwise)		LVEL	—

Figure 13.4.1 Sample CLAP Output