*----
*  Name          : pulseTHM_0d.x2m
*  Author        : Alain Hebert (2018)
*
*  SINGLE CHANNEL MULTIPHYSICS CALCULATION FOR A PULSE REACTOR
*  THM - POINT-KINETICS
*----
*  Define STRUCTURES and MODULES used
*----
LINKED_LIST PULSE MATEX FMAP THM ;
MODULE USPLIT: GEO: RESINI: THM: PKINI: PKINS: ABORT: END: ;

REAL keffn power ratiox dt2 ratiop ;

REAL Tfuel := 318.20357 ; (*fuel temperature in pool locations (K)*)
REAL Tcool := 318.15044 ; (*coolant temperature in pool locations (K)*)
REAL Dfuel := 9.7413951 ; (*fuel density in pool locations (g/cc)*)
REAL Dcool := 0.9903227 ; (*coolant density in pool locations (g/cc)*)
* assuming 67 W/fuel channel in the steady-state PULSE core
REAL powi := 67.0E-6 ; (*Reference core power (MW)*)
REAL pow1 pow2 test ;
REAL powmax := 0.0 ;
REAL dpow := 0.05 ; (*maximum of power log increment per stage (MW)*)

REAL maxh := 90.0 ;
REAL z1 := maxh 20.0 / ;
REAL z2 := maxh 20.0 / z1 + ;
REAL z3 := maxh 20.0 / z2 + ;
REAL z4 := maxh 20.0 / z3 + ;
REAL z5 := maxh 20.0 / z4 + ;
REAL z6 := maxh 20.0 / z5 + ;
REAL z7 := maxh 20.0 / z6 + ;
REAL z8 := maxh 20.0 / z7 + ;
REAL z9 := maxh 20.0 / z8 + ;
REAL z10 := maxh 20.0 / z9 + ;
REAL z11 := maxh 20.0 / z10 + ;
REAL z12 := maxh 20.0 / z11 + ;
REAL z13 := maxh 20.0 / z12 + ;
REAL z14 := maxh 20.0 / z13 + ;
REAL z15 := maxh 20.0 / z14 + ;
REAL z16 := maxh 20.0 / z15 + ;
REAL z17 := maxh 20.0 / z16 + ;
REAL z18 := maxh 20.0 / z17 + ;
REAL z19 := maxh 20.0 / z18 + ;
REAL z20 := maxh 20.0 / z19 + ;
PROCEDURE PfmapPULSE PkinPULSE ;
PROCEDURE assertS ;

*--
* geometry construction:
*--
PULSE := GEO: :: CAR3D 1 1 20
   EDIT 2
   X- REFL   X+ REFL
   Y- REFL   Y+ REFL
   Z- VOID  Z+ VOID 
   MESHX 0.0 1.2584422 SPLITX 2
   MESHY 0.0 1.2584422 SPLITY 2
   MESHZ 0.0 <<z1>> <<z2>> <<z3>> <<z4>> <<z5>> <<z6>> <<z7>> <<z8>>
         <<z9>> <<z10>> <<z11>> <<z12>> <<z13>> <<z14>> <<z15>> <<z16>>
         <<z17>> <<z18>> <<z19>> <<z20>>
   MIX
   PLANE 1
      1
   PLANE 2  SAME 1
   PLANE 3  SAME 1
   PLANE 4  SAME 1
   PLANE 5  SAME 1
   PLANE 6  SAME 1
   PLANE 7  SAME 1
   PLANE 8  SAME 1
   PLANE 9  SAME 1
   PLANE 10 SAME 1
   PLANE 11 SAME 1
   PLANE 12 SAME 1
   PLANE 13 SAME 1
   PLANE 14 SAME 1
   PLANE 15 SAME 1
   PLANE 16 SAME 1
   PLANE 17 SAME 1
   PLANE 18 SAME 1
   PLANE 19 SAME 1
   PLANE 20 SAME 1
;

*--
* link material index and geometry
*--
PULSE MATEX := USPLIT: PULSE :: EDIT 0  NGRP 1
              MAXR 80
              NFUEL 1 FMIX 1 ;

*--
* define fuelmap
*--
FMAP MATEX := PfmapPULSE MATEX :: <<powi>> ;

*--
* set global parameters:
*--
FMAP := RESINI: FMAP :: EDIT 2
  SET-PARAM 'T-FUEL' <<Tfuel>>
  SET-PARAM 'T-COOL' <<Tcool>>
  SET-PARAM 'D-FUEL' <<Dfuel>>
  SET-PARAM 'D-COOL' <<Dcool>>
  SET-PARAM 'B-ALPHA' 0.0
  SET-PARAM 'P-HE3' 11.0
  ;

*--
* call PKINI to initialize the point kinetic calculation
*--
REAL dt := 3.0E-4 ;
FMAP := PkinPULSE FMAP :: <<dt>> <<powi>> ;

*--
* THM single-stage calculation
*--
REAL t := -1.0 ;
THM FMAP := THM: FMAP ::
    EDIT 9
    TIME <<t>> (* s *)
    FPUISS 0.93
    INLET 330000.0 (*Pa*) 318.15 (*K*)
    INLET-Q 8.0E-5 (*m2*) 0.375 (*inlet mass flow rate kg/s*)
    CRITFL 8.5E6 (* W/m^2 *)
    ASSMB 1 0
    RADIUS 4.5E-3 4.6E-3 5.0E-3 5.0E-3 (* m *)
    RODMESH 15 20
    MONO
    RAD-PROF
    ! SPRC radial power profile
    0.0             0.97
    2.8776564975E-3 0.97
    3.8067819209E-3 1.05
    4.0696022599E-3 1.12
    4.3164847458E-3 1.18
    4.4348361582E-3 1.20
    4.5E-3          1.22
    ;

EVALUATE pow1 := powi ;
INTEGER istep := 0 ;

WHILE t 0.3 <= DO
  EVALUATE istep := istep 1 + ;
  ECHO "istep=" istep "t=" t "dt=" dt ;

*--
* perform a time stage:
*--
  EVALUATE ratiop := 2.0 ;
  WHILE ratiop 1.0 > DO
    EVALUATE dt2 := dt ;

    FMAP := PKINS: FMAP ::
      EDIT 2
      TIME <<t>> <<dt2>> PICK >>pow2<<
    ;
    EVALUATE ratiop := pow1 LN dpow / pow2 LN dpow / - ABS ;
    IF ratiop 1.0 > THEN
      EVALUATE dt := dt 0.5 * 2 _TRIM_ ;
    ENDIF ;
    ECHO "after PKINS: ratiop=" ratiop "dt=" dt ;
  ENDWHILE ;
  ECHO "#PKINS#:" istep t pow2 ;
  EVALUATE powmax := powmax pow2 _MAX_ ;

  THM FMAP := THM: THM FMAP ::
    EDIT 4
    TIME <<t>> <<dt>>
    PICK >>ratiox<<
  ;

*--
* time step control:
*--
  EVALUATE ratiop := pow1 LN dpow / pow2 LN dpow / - ABS ;
  ECHO "ratiop=" ratiop "ratiox=" ratiox ;
  EVALUATE ratiox := ratiop ratiox _MAX_ ;
  IF ratiox 0.0 > THEN
    EVALUATE test := 0.9 ratiox / 1.2 _MIN_ ;
    ECHO "test=" test "ratiox=" ratiox ;
    EVALUATE dt2 := dt test * 2 _TRIM_ ;
  ELSE
    EVALUATE dt2 := dt 1.2 * 2 _TRIM_ ;
  ENDIF ;
  ECHO "dt2=" dt2 ;

  EVALUATE t := t dt + ;
  ECHO "previous time step=" dt ;
  EVALUATE dt := dt2 ;  
  EVALUATE pow1 := pow2 ;
  ECHO "next time step=" dt "t=" t ;
ENDWHILE ;

REAL REFVALUE := 13.32290 ;
REAL DELTA := powmax REFVALUE - REFVALUE / ABS ;
IF DELTA 1.0E-3 < THEN
  ECHO "TEST SUCCESSFUL; DELTA=" DELTA ;
ELSE
  ECHO "------------" ;
  ECHO "TEST FAILURE" ;
  ECHO "------------" ;
  ECHO "REFERENCE=" REFVALUE " CALCULATED=" powmax ;
  ABORT: ;
ENDIF ;

ECHO "test pulseTHM_0d completed" ;
END: ;