LR-N05-0424, Attachment 1, Calculation S-1-SJ-MDC-1539, Revision 2, Accumulator Pressure Decay Time During Discharge Test.

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Attachment 1, Calculation S-1-SJ-MDC-1539, Revision 2, Accumulator Pressure Decay Time During Discharge Test.
ML052420526
Person / Time
Site: Salem PSEG icon.png
Issue date: 08/12/2005
From: Chandra V, Duffy J, Jerome Murphy
Public Service Enterprise Group
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
LR-N05-0424 S-1-SJ-MDC-1539, Rev 2
Download: ML052420526 (49)
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Text

Document Control Desk Attachment 1 LR-N05-0424 Calculation S-1-SJ-MDC-1539, Revision 2 Accumulator Pressure Decay Time During Discharge Test

(NC.DE-AP.Z-0002(Q), Rev. 12. Form 1) CALCULATION COVER SHEET Page 1of 40 CALCULATION NUMBER: S-1-SJ-MDC-1539 REVISION: 2 TITLE: Accumulator Pressure Decay Time During Dischanrge Test

  1. SHTS (CALC): 40 #ATTI#SHTS: 2c #IDVl50.59172.48 SHTS: 2-/ #TOTAL SHTS: ;5 3 CHECK ONE:

[0 FINAL [1 INTERIM (Proposed Plant Change) El VOID El FINAL (Future Confirmation Req'd, enter tracking Notification number:)

SALEM OR HOPE CREEK: 0 Q-LIST [EIMPORTANT TO SAFETY E NON-SAFETY RELATED HOPE CREEK ONLY: OQ EOQs ElQsh ElF OR ISFSI: E IMPORTANT TO SAFETY El NOT IMPORTANT TO SAFETY 0 ARE STATION PROCEDURES IMPACTED? YES 13 NO El If'yes', interface with the system engineer & procedure sponsor. All impacted procedures should be identified in a section in the calculation body [crca 70038194'0280]. Include an sap operation for update and list the sap orders here and within the body of this calculation.

SI.OP-ST.SJ-0006 SAP order 80017350, op. 0690 El CP and ADs INCORPORATED (IF ANY): l DESCRIPTION OF CALCULATION REVISION (If applicable.):

1. Incorporated the effect of increased stroke times of 13SJ54 and 14SJ54 valves
2. Developed acceptance criterion for each loop separately.
3. Incorporated the effect of dead period in the beginning of SJ54 stroke.

PURPOSE:

Determine the acceptane criteria for the pressure decay in the accumulator during the discharge test done in support of testing of SJ55 and SJ56 check valves.

CONCLUSIONS:

Acceptance criterion for pressure decay time for 11 loop check valves is less than or equal to 25.26 seconds.

Acceptance criterion for pressure decay time for 12 loop check valves is less than or equal to 25.62 seconds.

Acceptance criterion for pressure decay time for 13 loop check valves is less than or equal to 27.13 seconds.

Acceptance criterion for pressure decay time for 14 loop check valves is less than or equal to 27.13 seconds.

The time is measured from the instant when SJ54 valve disc begins to move.

This calculation needs NRC approval before implementation.

Printed Name I Signature Date ORIGINATOR/COMPANY NAME: Vijay Chandra/PSEG 1/ , Aug 8, 2005 REVIEWER/COMPANY NAME: James Murphy/PSEG l Aug 11, 2005 VERIFIER/COMPANY NAME: James Mur PS Aug 11, 2005 CONTRACTOR SUPERVISOR (Ifapplicable) U PSEG SUPERVISOR APPROVAL: (Always required) John Duffy 4 - I s 4 V

(NC.DE-AP.ZZ-0002(O), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 2 CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONTD ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: I VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 l James Murphy Aug 11, 2005 James Murphy Aug. 11,2005 Revision History Revision Date Description No. I 0 Feb 5, 1996 Original issue I Feb. 25, 2005 Added analysis for increased stroke times of 13SJ54 and 14SJ54 valves as a result of DCP's 80017350 and 80037351 2 Aug 08, 2005 Included the effect of dead period during the beginning of the stroke.

Developed the acceptance criterion for each loop.

Page Revision Index Page Revision Page Revision Page Revision Page Revision 1 2 19 2 37 2 _

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(NC.DE-AP.ZZ-0002(0), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET:

CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONTD ON SHEET:

ORIGINATOR: l DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy Aug 11, 2005 James Murphy Aug. 11,2005 Reason for Calculation Revision The method of testing SJ55 and SJ56 check valves by passing accumulator water to the reactor cavity by opening the SJ54 valve was approved by NRC via relief requests V-24 and V-25 (TAC No. M98259 and M98260). The acceptance criterion specified in these relief requests was applicable for the SJ54 gate valve stroke time of 12.5 seconds. Since then, the stroke times of 13SJ54 and 14SJ54 valves have been increased via DCP's 80017350 and 80037351. Since, the stroke time of SJ54 valve directly influences the accumulator pressure decay time, a revised acceptance criteria are needed for the 13 and 14 loop valves.

Also, it has been discovered that there is a delay time between the. instant the SJ54 valve push button is pressed and the valve disc begins to move. Therefore, the actual stroke time of the SJ54 valves is lower than the value used. The effect of this dead time has been incorporated in this calculation.

To keep the analysis as realistic as possible, the pressure decay time acceptance criterion has been developed for each loop.

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ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 l James Murphy Aug 11, 2005 James Murphy I Aug. 11, 2005 3.3 .Check Valves SJ55 and SJ56 The flow rate versus pressure drop relationship for these check valves was developed in Ref. [1] and will not be repeated here.

3.4 Gate Valve SJ54 The valve flow loss factor vs. stroke position was developed in Ref. [1] and will not be repeated here. Table 3.1 shows the stroke times and the delay times of each of the SJ54 valves. The gross stroke time is the duration between the instants the push button is pressed and the disc stops moving. The delay time is the period when the motor is spinning and the disc is not moving. The net disc stroke time was calculated by subtracting the delay time from the gross stroke time.

Table 3.4.1 SJ54 Valve Stroke and Delay times Valve ID Gross Opening Reference Delay Time Reference Net Disc Movement No. Stroke Time (sec.) (sec.) Time (sec) 11 SJ54 9.6 Att. 2 0.83 Aft. 2 8.77 12SJ54 10.5 Aft. 2 0.69 Att. 2 9.81 13SJ54 20.5 Notification 1.38 Aft. 1 19.12 20188810 14SJ54 21.3 Notification 1.36 AIt. 1 19.94 20188884 1 1 3.5 Friction Loss Factors and Inertial Lengths of Accumulator Discharge Piping Tables 3.5.1, 3.5.2, 3.5.3, and 3.5.4 show the friction loss factors of the discharge piping. The effective A is shown underneath each table.

Effective A Li where, Li = Length of Ith pipe segment Ai = Flow area of i' pipe segment (See Ref. I page 24 for its use)

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(NC.DE-AP.ZZ-0002(C), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: l B CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONTD ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: D Vijay Chandra Aug 08, 2005 l James MurphY Aug 11, 2005 l James Murphy l Aug. 11,2005 Table 3.6.1 Computer Program Listing: Analysis of 11 Loop, Check Valve Maximum Lift = 60 Deg.

OPEN(I,FILE='Acc 11-hoff-60deg.out', STATUS='old')

DATA WOF/0.,.05,.1,.2,.3,.4,.5,.6,.7,.8,.9,1./

DATA CVCV/0., 0.01 94, 0.055, 0.1, 0.146, 0.204,

  1. 0.277,0.3536,0.4613,0.6086,0.767,1./

C PARAMETERS C SINPHM =SINE OF MAXIMUM ANGLE OF CHECK VALVE TRAVEL (NONDIMENSIONAL)

SINPHM=0.866 C AKASQ = SUMMATION KIA**2 [FT**(-4)]

SKASQ=37.12 C SLOA = SUMMATION L/A [FT**(-1)]

SLOA=261.3 C VOTI = DISK MOVEMENT TIME OF SJ54 GATE VALVE (SEC)

VOT1 =8.77 C CONSTANTS GAM=1.3 G=32.174 RHO=1.94 AREA=0.394 DT=O.01 PCAV=14.7*144.

C INITIAL CONDITIONS TIME=0.1 NSTEP=-1 VNAZ=408.3 VNA=VNAZ PAZ=84.7*144.

PA=PAZ Q=.001 ZCAV=127.

WRITE(1,101) 101 FORMAT(T19'TIME', T28'ACCUMULATOR PRESSURE FLOW RATE')

103 FORMAT(T19'(SEC.)',T28' (PSIG) (GPM) ',II)

WRITE(1,103) 31 NSTEP=NSTEP+1 TIME=TIME+DT C CALCULATE ACCUMULATOR LEVEL ELEVATION VWA=1350.-VNA ZA=(VWA+7801.2)/95.76 C CALCULATE ACCUMULATOR GAS PRESSURE PA=PAZ*(VNAZ/VNA)**GAM C CALCULATE SJ54 LOSS FACTOR GVKZ=.15 IF(TIME .LT. VOTI) THEN VOF=TIMENOT1 CALL INTER(VOF,CVND,12,WOF,CVCV)

GVK=GVKZ/(CVND*CVND)

ELSE GVK=GVKZ ENDIF C CALCULATE CHECK VALVE DP VEL=Q/AREA AV2=38.31(VEL*VEL)

(contd.)

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET:

CALC NO.: S-1-SJ-MDCG1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra l Aug 08, 2005 James Murphy Aug 11, 2005 l James Murphy Aug.11, 2005 Table 3.6.1 (contd.)

SINPHI=0.5*(SQRT(AV2**2+4.}AV2)

IF (SINPHI .GE. SINPHM) SINPHI=SINPHM DPCHK=2.*8.98*RHO*VEL*VEL*(1.-SINPHI)

C CALCULATE DERIVATIVES DQDT=(PA+RHO*G*ZA-PCAV-RHO*G*ZCAV-0.5*RHO*SKASQ*Q*ABS(Q)

  1. -0.5*GVK*RHO*Q*ABS(Q)/AREA**2 - DPCHK)/(RHO*SLOA)

DVNADT=Q C CALCULATE VALUES AT NEW TIME STEP QQ=Q+DQDT*DT WNA=VNA+DVNADT*DT IF (TIME .LE. 2.) THEN IF(MOD(NSTEP,10) .EQ. 0)WRITE(1,102) TIME,+(PA/144.-14.7),

  1. Q*7.48*60.

ELSE IF(MOD((NSTEP+10),100) .EQ. 0)WRITE(1,102) TIME,+(PA/144.-14.7),

  1. Q*7.48*60.

ENDIF 102 FORMAT(F23.3,8F17.2)

C UPDATE THE OLD VARIABLES Q=QQ VNA=VVNA IF(TIME .GT. 41.) STOP GO TO 31 END SUBROUTINE INTER(X,Y,N,XX,YY)

DIMENSION XX(N),YY(N)

IF(X .LT. XX(1) .OR. X .GT. XX(N)) GO TO 3 DO 2 J=2,N IF(X .GE. XX(J-1) .AND. X .LE. XX(J)) GO TO 101 GOTO2 101 Y=YY(J-1 )+(YY(J)-YY(J- I))*(X-XX(J- I))/

1 (XX(J)-XX(J-1))

RETURN 2 CONTINUE 3 WRITE(6,1) X,(XX(I),I=1,N) 1 FORMAT(' BEYOND RANGE',G10.4,5X,20G10.4)

RETURN END

(NC.DE-AP.ZZ-0002(0), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 2o CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONTD ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy Aug 11, 2005 l James Murphy Aug. 11, 2005 Table 3.6.2 Computer Program Listing: Analysis of 12 Loop, Check Valve Maximum Lift = 60 Deg.

OPEN(1,FILE='Accl2-hoff-60deg.out', STATUS='old')

DATA WOF/0.,.05,.1,.2,.3,.4,.5,.6,.7,.8,.9,1./

DATA CVCV/0., 0.01 94, 0.055, 0.1, 0.146, 0.204,

  1. 0.277,0.3536,0.4613,0.6086,0.767,1./

C PARAMETERS C SINPHM =SINE OF MAXIMUM ANGLE OF CHECK VALVE TRAVEL (NONDIMENSIONAL)

SINPHM=0.866 C AKASQ = SUMMATION K/A**2 [FT**(-4)]

SKASQ=37.69 C SLOA = SUMMATION L/A [FT**(-1)]

SLOA=256.8 C VOTI = DISK MOVEMENT TIME OF SJ54 GATE VALVE (SEC)

VOT1=9.81 C CONSTANTS GAM=1.3 G=32.174 RHO=1.94 AREA=0.394 DT=0.01 PCAV=14.7*144.

C INITIAL CONDITIONS TIME=0.1 NSTEP=-1 VNAZ=408.3 VNA=VNAZ PAZ=84.7*144.

PA=PAZ Q=.001 ZCAV=127.

WRITE(1,101) 101 FORMAT(T1I9TIME', T28'ACCUMULATOR PRESSURE FLOW RATE')

103 FORMAT(T19'(SEC.)',T28' (PSIG) (GPM) ',II)

WRITE(1,103) 31 NSTEP=NSTEP+1 TIME=TIME+DT C CALCULATE ACCUMULATOR LEVEL ELEVATION VWA=1350.-VNA ZA= (VWA+7801.2)195.76 C CALCULATE ACCUMULATOR GAS PRESSURE PA=PAZ*(VNAZIVNA)**GAM C CALCULATE SJ54 LOSS FACTOR GVKZ=.15 IF(TIME .LT. VOT1) THEN VOF=TIMENOTI CALL INTER(VOF,CVND,12,VVOF,CVCV)

GVK=GVKZI(CVND*CVND)

ELSE GVK=GVKZ ENDIF C CALCULATE CHECK VALVE DP VEL=Q/AREA AV2=38.3/(VEL*VEL)

(contd.)

(NC.DE-AP.ZZ.0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 2 CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy Aug 11, 2005 l James Murphy Aug. 11, 2005 Table 3.6.2 (contd.)

SINPHI=0.5*(SQRT(AV2**2+4.}AV2)

IF (SINPHI .GE. SINPHM) SINPHI=SINPHM DPCHK=2.*8.98*RHO*VEL*VEL*(1.-SINPHI)

C CALCULATE DERIVATIVES DQDT=(PA+RHO*G*ZA-PCAV-RHO*G*ZCAV-0.5*RHO*SKASQ*Q*ABS(Q)

  1. -0.5*GVK*RHO*Q*ABS(Q)/AREA**2 - DPCHK)/(RHO*SLOA)

DVNADT=Q C CALCULATE VALUES AT NEW TIME STEP QQ=Q+DQDT*DT WNA=VNA+DVNADTDT IF (TIME .LE. 2.) THEN IF(MOD(NSTEP,10) .EQ. 0)WRITE(1,102) TIME,+(PA/144.-14.7),

  1. Q*7.48*60.

ELSE IF(MOD((NSTEP+ 10),100) .EQ. 0)WRITE(1,102) TIME,+(PA/144.-14.7),

  1. Q*7.48*60.

ENDIF 102 FORMAT(F23.3,8F17.2)

C UPDATE THE OLD VARIABLES Q=QQ VNA=WNA IF(TIME .GT. 41.) STOP GO TO 31 END SUBROUTINE INTER(X,Y,N,XX,YY)

DIMENSION XX(N),YY(N)

IF(X .LT. XX(1) .OR. X .GT. XX(N)) GO TO 3 DO 2 J=2,N IF(X .GE. XX(J-1) .AND. X .LE. XX(J)) GO TO 101 GO TO 2 101 Y=YY(J-1)+(YY(J)-YY(J-1))*(X-XX(J-1))/

I (XX(J)-XX(J-1))

RETURN 2 CONTINUE 3 WRITE(6,1) X,(XX(I),I=1,N) 1 FORMAT(' BEYOND RANGE',G10.4,5X,20G10.4)

RETURN END

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 2.

CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONTD ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFER: DATE:

Vijay Chandra Aug 08, 2005 l James Murphy Aug 11,2005 James Murphy Aug. 11, 2005 Table 3.6.3 Computer Program Listing: Analysis of 13 Loop, Check Valve Maximum Lift = 60 Deg.

DIMENSION WOF(12),CVCV(12)

OPEN(1,FILE='Accl3-hoff-60deg.out', STATUS='old')

DATA WOF/0.,.05,.1,.2,.3,.4,.5,.6,.7,.8,.9,1 J DATA CVCV/0., 0.0194, 0.055, 0.1, 0.146, 0.204, 0.277,0.3536,0.4613,0.6086,0.767,1./

C PARAMETERS C SINPHM =SINE OF MAXIMUM ANGLE OF CHECK VALVE TRAVEL (NONDIMENSIONAL)

SINPHM=0.866 C SKASQ = SUMMATION K/A**2 [FT**(-4)]

SKASQ=35.83 C SLOA = SUMMATION UA [FT**(-1)]

SLOA=235.6 C VOT1 = DISK MOVEMENT TIME OF SJ54 GATE VALVE (SEC)

VOT1 =19.12 C CONSTANTS GAM=1.3 G=32.174 RHO=1.94 AREA=0.394 DT=0.01 PCAV=14.7*144.

C INITIAL CONDITIONS TIME=0.1 NSTEP=-1 VNAZ=408.3 VNA-VNAZ PAZ=84.7*144.

PA=PAZ Q=.001 ZCAV=127.

WRITE(1,101) 101 FORMAT(T19'TIME', T28'ACCUMULATOR PRESSURE FLOW RATE')

103 FORMAT(T19'(SEC.)',T28' (PSIG) (GPM) ',1I)

WRITE(1,103) 31 NSTEP=NSTEP+1 TIME=TIME+DT C CALCULATE ACCUMULATOR LEVEL ELEVATION VWA=1350.-VNA ZA=(VWA+7801.2)195.76 C CALCULATE ACCUMULATOR GAS PRESSURE PA=PAZ*(VNAZNNA)**GAM C CALCULATE SJ54 LOSS FACTOR GVKZ-.15 IF(TIME .LT. VOT1) THEN VOF=TIMENOTI CALL INTER(VOF,CVND,12,VVOF,CVCV)

GVK=GVKZ/(CVND*CVND)

ELSE GVK=GVKZ ENDIF C CALCULATE CHECK VALVE DP VEL=QIAREA (contd.)

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 23 CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murhy Aug 11, 2005 James Murphy Aug. 11, 2005 Table 3.6.3 (contd.)

AV2=38.3/(VEL*VEL)

SINPHI=0.5*(SQRT(AV2**2+4.)-AV2)

IF (SINPHI .GE. SINPHM) SINPHI=SINPHM DPCHK=2.*8.98*RHO*VEL*VEL*(1.-SINPHI)

C CALCULATE DERIVATIVES DQDT=(PA+RHO*G*ZA-PCAV-RHO*G*ZCAV-0.5*RHO*SKASQ*Q*ABS(Q)

  1. -0.5*GVK*RHO*Q*ABS(Q)/AREA**2 - DPCHK)I(RHO*SLOA)

DVNADT=Q C CALCULATE VALUES AT NEW TIME STEP QQ=Q+DQDTDT WVNA--VNA+DVNADTDT IF (TIME .LE. 2.) THEN IF(MOD(NSTEP,10) .EQ. 0)WRITE(1,102) TIME,+(PA/144.-14.7),

  1. Q*7.48*60.

ELSE IF(MOD((NSTEP+10),100) .EQ. 0)WRITE(1,102) TIME,+(PA1144.-14.7),

  1. Q*7.48*60.

ENDIF 102 FORMAT(F23.3,8F17.2)

C UPDATE THE OLD VARIABLES Q=QQ VNA=WNA IF(TIME .GT. 41.) STOP GO TO 31 END SUBROUTINE INTER(X,Y,N,XX,YY)

DIMENSION XX(N),YY(N)

IF(X .LT. XX(1) .OR. X .GT. XX(N)) GO TO 3 DO 2 J=2,N IF(X .GE. XX(J-1) .AND. X .LE. XX(J)) GO TO 101 GOTO2 101 Y=YY(J-1)+(YY(J}-YY(J-1))*(X-XX(J-I))f I (XX(J)-XX(J-1))

RETURN 2 CONTINUE 3 WRITE(6,1) X,(XX(I),I=1,N) 1 FORMAT(' BEYOND RANGE',G10.4,5X,20G10.4)

RETURN END

(NC.DE-AP.ZZ-0002(0), Rev. 12,Form2) CALCULATION CONTINUATION SHEET SHEET: 24 CALCNO.: S-1-SJ-MDC-1539 REV: 2 REF: CONTD ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra l Aug 08, 2005 James Murphy l Aug 11, 2005 I James Murphy Aug. 11, 2005 Table 3.6.4 Computer Program Listing: Analysis of 14 Loop, Check Valve Maximum Lift = 60 Deg.

DIMENSION VVOF(12),CVCV(12)

OPEN(1,FILE='Accl4-hoff-60deg.out', STATUS='old')

DATA VVOF/0.,.05,.1,.2,.3,.4,.5,.6,.7,.8,.9,1.1 DATA CVCV/0., 0.01 94, 0.055, 0.1, 0.146, 0.204,

  1. 0.277,0.3536,0.4613,0.6086,0.767,1./

C PARAMETERS C SINPHM =SINE OF MAXIMUM ANGLE OF CHECK VALVE TRAVEL (NONDIMENSIONAL)

SINPHM=0.866 C SKASQ = SUMMATION K/A**2 [FT**(-4)]

SKASQ=34.76 C SLOA = SUMMATION UA [FT**(-1)]

SLOA=222.5 C VOT1 = DISK MOVEMENT TIME OF SJ54 GATE VALVE (SEC)

VOTI =19.94 C CONSTANTS GAM=1.3 G=32.174 RHO=1.94 AREA=0.394 DT=0.01 PCAV=14.7*144.

C INITIAL CONDITIONS TIME=0.1 NSTEP=-1 VNAZ=408.3 VNA=VNAZ PAZ=84.7*144.

PA=PAZ Q=.001 ZCAV=127.

WRITE(1,101) 101 FORMAT(TI9TIME', T28'ACCUMULATOR PRESSURE FLOW RATE')

103 FORMAT(T19'(SEC.)',T28' (PSIG) (GPM) ',II)

WRITE(1,103) 31 NSTEP=NSTEP+1 TIME=TIME+DT C CALCULATE ACCUMULATOR LEVEL ELEVATION VWA=1350.-VNA ZA=(VWA+7801.2)/95.76 C CALCULATE ACCUMULATOR GAS PRESSURE PA= PAZ*(VNAZIVNA)**GAM C CALCULATE SJ54 LOSS FACTOR GVKZ=.15 IF(TIME .LT. VOT1) THEN VOF=TIMENOTI CALL INTER(VOF,CVND,12,WOF,CVCV)

GVK=GVKZ/(CVND*CVND)

ELSE GVK=GVKZ ENDIF C CALCULATE CHECK VALVE DP VEL=QIAREA (contd.)

(NC.DE-AP.ZZ-0002(Q). Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 25 CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONTD ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 l James Murphy Aug 11, 2005 James Murphy Aug. 11, 2005 Table 3.6.4 (contd.)

AV2=38.3/(VEL*VEL)

SINPHI=0.5*(SQRT(AV2**2+4.}AV2)

IF (SINPHI .GE. SINPHM) SINPHI=SINPHM DPCHK=2.*8.98*RHO*VEL*VEL*(l.-SINPHI)

C CALCULATE DERIVATIVES DQDT=(PA+RHO*G*ZA-PCAV-RHO*G*ZCAV-0.5*RHO*SKASQ*Q*ABS(Q)

  1. -0.5*GVK*RHO*Q*ABS(Q)/AREA**2 - DPCHK)/(RHO*SLOA)

DVNADT=Q C CALCULATE VALUES AT NEW TIME STEP QQ=Q+DQDT*DT WVNA=VNA+DVNADT*DT IF (TIME .LE. 2.) THEN IF(MOD(NSTEP,10) .EQ. 0)WRITE(1,102) TIME,+(PA/144.-14.7),

  1. Q*7.48*60.

ELSE IF(MOD((NSTEP+10),100) .EQ. 0)WRITE(1,102) TIME,+(PA1144.-14.7),

  1. Q*7.48*60.

ENDIF 102 FORMAT(F23.3,8F17.2)

C UPDATE THE OLD VARIABLES Q=QQ VNA=WNA IF(TIME .GT. 41.) STOP GO TO 31 END SUBROUTINE INTER(X,Y,N,XX,YY)

DIMENSION XX(N),YY(N)

IF(X .LT. XX(1) .OR. X .GT. XX(N)) GO TO 3 DO2J=2,N IF(X .GE. XX(J-1) .AND. X .LE. XX(J)) GO TO 101 GOTO2 101 Y=YY(J-1)+(YY(J)-YY(J-1))*(X-XX(J-1))f I (XX(J)-XX(J-I))

RETURN 2 CONTINUE 3 WRITE(6,1) X,(XX(I),I=1,N)

I FORMAT(' BEYOND RANGE',G10.4,5X,20G10.4)

RETURN END

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: A2- co CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: _______ _ CONTO ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: l VERFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy I Aug 11, 2005 James Murphy Aug.11,2005

4. Results All four loops were analyzed inidividually with their own specific data and geometrical input. For 11 loop, two analyses were run for pressure decay time calculation (one for the check valve free case and other with check valve having maximum lift 60 degrees). Table 4.1 shows the time history of pressure decay and the discharge flow rate of 11-accumulator for the 60 degree check valve lift. Table 4.2 shows the pressure decay time history and the discharge flow rate of 21 -accumulator for the free check valve case.

For 12, 13, and 14 loops, the pressure decay analyses were done for the case where the maximum lift for the check valves is 60 degrees. Table 4.3 shows the time history of pressure decay and the discharge flow rate of 12-accumulator for the 60 degree check valve lift. Table 4.4 shows the time history of pressure decay and the discharge flow rate of 13-accumulator for the 60 degree check valve lift. Table 4.5 shows the time history of pressure decay and the discharge flow rate of 14-accumulator forthe 60 degree check valve lift.

For all cases analyzed, the flow rate exceeded 3537 gpm (corresponding to 20 ft/s velocity in 0.394 ft2 aea pipe), the minimum flow rate required for full disk lift.

Figure 4.1 shows the plots of pressure decay time history of 11 accumulator and Figure 4.2 shows the discharge flow rate time histories of 11 accumulators for the two cases analyzed (check valves are free and the check valves maximum lift is 60 degrees).

From the tabular data, the following results are obtained for 60 degree maximum lift cases.

For 11-accumulator, the pressure decay time from 70 psig to 35 psig is 26.76 seconds.

For 12-accumulator, the pressure decay time from 70 psig to 35 psig is 27.12 seconds.

For 13-accumulator, the pressure decay time from 70 psig to 35 psig is 28.63 seconds.

For 14-accumulator, the pressure decay time from 70 psig to 35 psig is 28.63 seconds.

As per the recommendation of the saferty evaluation report docket No. 50-311 dated January 2, 2004 (Relief Request RR S2-RR-03-VO1 and RR S2-RR-03-V02) and docket Nos. 50-271 and 50-311 dated March 12, 1999, the acceptance criterion for the pressure decay time is 1.5 second less than the calculated pressure decay time for the 60 degree check valve lift case.

Therefore, the valve passing acceptance criteria for the check valves are as follows:

Acceptance criterion for pressure decay time for 11 loop check valves is less than or equal to 25.26 -

seconds.

Acceptance criterion for pressure decay time for 12 loop check valves is less than or equal to 25.62 seconds.

Acceptance criterion for pressure decay time for 13 loop check valves is less than or equal to 27.13 -

seconds.

Acceptance criterion for pressure decay time for 14 loop check valves is less than or equal to 27.13 seconds.

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 27 CALCNO.: S-1-SJ-MDC-1539 REV: 2 REF: CONT'DON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy I Aug 11, 2005 James Murphy Aug. 11, 2005 Table 4.1 11 Accumulator Pressure and Discharge Flow Rate Time History (Check Valve Maximum Lift =60 deg)

TIME ACCUMULATOR FLOW RATE PRESSURE (SEC.) (PSIG) (GPM) 0.110 70.00 0.45 0.210 69.99 331.13 0.310 69.96 486.85 0.410 69.93 638.29 0.510 69.89 814.87 0.610 69.83 1040.08 0.710 69.76 1271.14 0.810 69.68 1500.05 0.910 69.59 1722.89 1.010 69.48 1917.43 1.110 69.36 2088.16 1.210 69.23 2239.23 1.310 69.10 2375.40 1.410 68.95 2500.59 1.510 68.80 2616.95 1.610 68.65 2725.73 1.710 68.49 2827.71 1.810 68.32 2923.51 1.910 68.15 3013.92 2.010 67.97 3099.09 3.010 66.04 3717.72 4.010 63.93 4063.75 5.010 61.79 4211.16 6.010 59.72 4246.59 7.010 57.74 4230.09 8.010 55.87 4176.19 9.010 54.11 4105.84 10.010 52.45 4018.54 11.010 50.90 3930.78 12.010 49.44 3846.08 13.010 48.07 3764.53 14.010 46.78 3685.92 15.010 45.56 3610.05 16.010 44.40 3536.72 17.010 43.31 3465.76 18.010 42.27 3397.02 19.010 41.28 3330.35 20.010 40.34 3265.63 21.010 39.45 3202.74 22.010 38.60 3141.56 23.010 37.78 3082.00 24.010 37.01 3023.96 25.010 36.27 2967.37 26 7 26.010 35.56 2912.14 W ppE'SufftETlt- EL 7 C 27.011 34.87 2858.20/

28.011 34.22 2805.48 29.011 33.60 2753.93 30.011 33.00 2703.47 31.011 32.42 2654.07 32.011 31.87 2605.66 (contd.)

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form2) CALCULATION CONTINUATION SHEET SHEET: 2-CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 I James Murphy l Aug 11, 2005 James Murphy_ Aug. 11, 2005 Table 4.1 (contd.)

33.010 31.33 2558.20 34.010 30.82 2511.65 35.010 30.33 2465.96 36.010 29.85 2421.10 37.010 29.39 2377.03 38.010 28.95 2333.71 39.009 28.52 2291.11 40.009 28.11 2249.20 41.009 27.72 2207.96

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 2 9)

CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy Aug 11, 2005 James Murphy I Aug. 11,2005 Table 4.2 11 Accumulator Pressure and Discharge Flow Rate Time History (Check Valve Free)

TIME ACCUMULATOF Z FLOW RATE PRESSURE (SEC.) (PSIG) (GPM) 0.110 70.00 0.45 0.210 69.99 331.13 0.310 69.96 486.85 0.410 69.93 638.29 0.510 69.89 814.87 0.610 69.83 1040.08 0.710 69.76 1271.14 0.810 69.68 1500.05 0.910 69.59 1722.89 1.010 69.48 1917.43 1.110 69.36 2088.44 1.210 69.23 2244.83 1.310 69.10 2391.19 1.410 68.95 2529.92 1.510 68.80 2662.33 1.610 68.64 2789.15 1.710 68.47 2910.80 1.810 68.30 3027.64 1.910 68.12 3140.28 2.010 67.94 3248.70 3.010 65.86 4083.23 4.010 63.53 4587.00 5.010 61.13 4836.43 6.010 58.78 4922.30 7.010 56.54 4926.44 8.010 54.42 4869.63 9.010 52.45 4783.51 10.010 50.61 4668.92 11.010 48.90 4551.15 12.010 47.31 4437.40 13.010 45.83 4328.29 14.010 44.44 4223.55 15.010 43.14 4122.85 16.010 41.91 4025.89 17.010 40.76 3932.38 18.010 39.68 3842.07 19.010 38.65 3754.73 20.010 37.68 3670.15 21.010 36.77 3588.15 22.010 35.90 3507.44 23.010 35.07 3417.51 24.010 34.29 3324.09 25.010 33.55 3231.29 26.010 32.86 3140.28 27.011 32.19 3051.35 28.011 31.57 2964.53 29.011 30.97 2879.73 30.011 30.40 2796.88 (contd.)

(NC.DE-AP.ZZ-0002(0). Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 30 CALC No.: S-1-SJ-MDC-1539 REV: 2 REF: - CONTD ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VER IFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy I Aug 11, 2005 James Murphy Aug. 11, 2005 Table 4.2 (contd.)

31.011 29.87 2715.87 32.011 29.36 2636.63 33.010 28.87 2559.07 34.010 28.41 2483.13 35.010 27.97 2408.74 36.010 27.55 2335.84 37.010 27.15 2264.40 38.010 26.76 2194.36 39.009 26.40 2125.71 40.009 26.05 2058.40 41.009 25.72 1992.44

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 3 CALC NO.: S-1 -SJ-MDC-1539 REV: 2 REF: ._CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy l Aug 11, 2005 James Murphy Aug. 11,2005 Table 4.3 12 Accumulator Pressure and Discharge Flow Rate Time History (Check Valve Maximum Lift = 60 deg)

TIME ACCUMULATOR FLOW RATE PRESSURE (SEC.) (PSIG) (GPM) 0.110 70.00 0.45 0.210 69.99 301.90 0.310 69.97 443.15 0.410 69.94 581.47 0.510 69.90 719.06 0.610 69.85 911.44 0.710 69.79 1123.51 0.810 69.72 1336.27 0.910 69.63 1546.00 1.010 69.53 1750.23 1.110 69.42 1928.19 1.210 69.31 2083.43 1.310 69.18 2220.47 1.410 69.04 2344.12 1.510 68.90 2458.16 1.610 68.76 2564.62 1.710 68.60 2664.64 1.810 68.45 2758.91 1.910 68.28 2847.87 2.010 68.12 2931.91 3.010 66.27 3552.77 4.010 64.23 3923.24 5.010 62.14 4115.87 6.010 60.09 4175.89 7.010 58.12 4179.19 8.010 56.25 4146.63 9.010 54.48 4087.07 10.010 52.81 4017.04 11.010 51.25 3933.06 12.010 49.77 3848.67 13.010 48.39 3767.14 14.010 47.08 3688.53 15.010 45.85 3612.67 16.010 44.68 3539.36 17.010 43.58 3468.44 18.010 42.53 3399.73 19.010 41.54 3333.12 20.010 40.59 3268.45 21.010 39.69 3205.62 22.010 38.83 3144.50 23.010 38.01 3085.02 24.010 37.23 3027.06 25.010 36.48 2970.55 26.010 35.76 2915.40 27.011 35.07 2861-55 KE S&IE-psE L C, 5k 'Ti -Y27-12 e7 28.011 34.42 2808.93 >

29.011 33.79 2757.47 30.011 33.18 2707.11 31.011 32.60 2657.81 (contd.)

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 32.

CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy Aug 11, 2005 James Murphy Aug. 11, 2005 Table 4.3 (contd.)

32.011 32.04 2609.50 33.010 31.50 2562.15 34.010 30.99 2515.70 35.010 30.49 2470.13 36.010 30.01 2425.37 37.010 29.55 2381.41 38.010 29.10 2338.21 39.009 28.67 2295.73 40.009 28.26 2253.94 41.009 27.86 2212.81

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 33 CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: __CONT'D ON SHEET; ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 l James Murphy Aug 11, 2005 l James Murphy I Aug. 11, 2005 Table 4.4 13 Accumulator Pressure and Discharge Flow Rate Time History (Check Valve Maximum Lift = 60 deg)

TIME ACCUMULATOF FLOW RATE PRESSURE (SEC.) (PSIG) (GPM) 0.110 70.00 0.45 0.210 69.99 165.51 0.310 69.98 243.73 0.410 69.96 321.31 0.510 69.94 398.14 0.610 69.92 474.18 0.710 69.89 549.43 0.810 69.85 623.95 0.910 69.81 697.79 1.010 69.77 781.38 1.110 69.72 899.98 1.210 69.66 1024.42 1.310 69.60 1148.73 1.410 69.53 1271.91 1.510 69.45 1393.65 1.610 69.36 1513.77 1.710 69.27 1632.12 1.810 69.17 1748.59 1.910 69.06 1863.04 2.010 68.95 1966.00 3.010 67.61 2599.23 4.010 66.03 3035.70 5.010 64.29 3346.58 6.010 62.49 3558.90 7.010 60.67 3724.33 8.010 58.87 3821.96 9.010 57.10 3883.04 10.010 55.39 3899.61 11.010 53.75 3887.52 12.010 52.18 3859.46 13.010 50.69 3824.28 14.010 49.28 3779.19 15.010 47.93 3728.39 16.010 46.65 3670.69 17.010 45.43 3609.19 18.010 44.28 3547.07 19.010 43.19 3484.65 20.010 42.14 3418.66 21.010 41.16 3351.48 22.010 40.21 3285.91 23.010 39.32 3222.16 24.010 38.47 3160.15 25.010 37.65 3099.79 26.010 36.88 3040.97 27.011 36.13 2983.62 T 1E 86 e 28.011 35.42 2927 66J PP Sc5 E 7 TE E- 28 3 Ser.

29.011 34.74 2873.01 30.011 34.09 2819.60 31.011 33.46 2767.36 (contd.)

(NC.DE-APZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 3 CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy Aug 11, 2005 James Murphy Aug. 11, 2005 Table 4.4 (contd.)

32.011 32.86 2716.25 33.010 32.29 2666.20 34.010 31.73 2617.16 35.010 31.20 2569.09 36.010 30.69 2521.93 37.010 30.19 2475.65 38.010 29.72 2430.21 39.009 29.26 2385.57 40.009 28.82 2341.69 41.009 28.40 2298.54

(NC.DE-AP.ZZ-002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET: 35 CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy Aug 11, 2005 James Murphy Aug. 11, 2005 Table 4.5 14 Accumulator Pressure and Discharge Flow Rate Time History (Check Valve Maximum Lift 60 deg)

TIME ACCUMULATOR FLOW RATE PRESSURE (SEC.) (PSIG) (GPM) 0.110 70.00 0.45 0.210 69.99 159.52 0.310 69.98 234.93 0.410 69.97 309.78 0.510 69.95 383.94 0.610 69.92 457.37 0.710 69.89 530.06 0.810 69.86 602.06 0.910 69.82 673.42 1.010 69.78 744.56 1.110 69.73 850.40 1.210 69.68 970.47 1.310 69.61 1091.35 1.410 69.55 1211.33 1.510 69.47 1330.04 1.610 69.39 1447.32 1.710 69.30 1563.04 1.810 69.20 1677.06 1.910 69.10 1789.29 2.010 68.99 1899.45 3.010 67.69 2546.68 4.010 66.12 2985.03 5.010 64.41 3303.10 6.010 62.63 3519.77 7.010 60.82 3693.01 8.010 59.02 3799.00 9.010 57.26 3869.68 10.010 55.54 3896.98 11.010 53.90 3892.90 12.010 52.32 3866.93 13.010 50.82 3835.78 14.010 49.40 3793.13 15.010 48.04 3745.87 16.010 46.75 3691.39 17.010 45.52 3632.00 18.010 44.36 3569.68 19.010 43.25 3507.99 20.010 42.20 3445.49 21.010 41.20 3379.10 22.010 40.26 3312.62 23.010 39.35 3247.83 24.010 38.49 3184.80 25.010 37.67 3123.46 26.010 36.89 3063.71 27.011 36.14 3005.46 ke., 'fj:263£'c 28.011 35.42 2948.62 EJ e rStu(1 5.>W 5S 29.011 34.74 2893.13 30.011 34.08 2838.90 (contd.)

(NC.DE-AP.ZZ-0002(Q), Rev. 12, Form 2) CALCULATION CONTINUATION SHEET SHEET:

CALC NO.: S-1 -SJ-MDC-1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy Aug 11, 2005 James Murphy Aug. 11, 2005 Table 4.5 (contd.)

31.011 33.45 2785.88 32.011 32.85 2734.00 33.010 32.27 2683.20 34.010 31.71 2633.44 35.010 31.17 2584.67 36.010 30.66 2536.83 37.010 30.16 2489.88 38.010 29.69 2443.79 39.009 29.23 2398.51 40.009 28.78 2354.01 41.009 28.36 2310.25

11 Accumulator Flow Rate (gpm)

  • 6000 5000 C_ __11 ______ ______ 111-11" LA LA 4000 =~~~~~~~~~~~~~~~~~~~~~4

_=________==__= _A C 0.

co 3000 IL

__ __J _ _- - - _ _ _ _ t 0 r"1 L"

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0 5 10 15 20 25 30 35 40 45 Time (sec) l Flow Rate (Check Valve Maximum Lift = 60 deg)l I - Flow Rate (Check Valve Free)

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11 Accumulator Pressure 80 70 its,,

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0 5 10 15 20 25 30 35 40 45 Time (sec)

Accumulator Pressure (Check Valve Maximum Lift = 60 deg) V

- Accumulator Pressure (Check Valve Free) e',

F/ci 4#' I/- ACetrrUtLaTdZ P FSSt'C 7/ -SHISrc

(NC.DE-AP.ZZ-0002(Q), Rev. 12. Form 2) CALCULATION CONTINUATION SHEET SHEET:

CALC NO.: S-1-SJ-MDC-1539 REV: 2 REF: CONT'D ON SHEET:

ORIGINATOR: DATE: REVIEWER: DATE: VERIFIER: DATE:

Vijay Chandra Aug 08, 2005 James Murphy Aug 11, 2005 James Murphy Aug. 11, 2005

5. Conclusions As calculated in Section 4, the acceptance criterion for pressure decay from 70 psig to 35 psig in the accumulators is as follows:

Acceptance criterion for pressure decay time for 11 loop check valves is less than or equal to 25.26 seconds.

Acceptance criterion for pressure decay time for 12 loop check valves is less than or equal to 25.62 -

seconds.

Acceptance criterion for pressure decay time for 13 loop check valves is less than or equal to 27.13-seconds.

Acceptance criterion for pressure decay time for 14 loop check valves is less than or equal to 27.13 seconds.

The time is measured from the instant when SJ54 valve disc begins to move.

6. Documents Affected Procedure SI1.OP-ST.SJ-0006 will be revised after this calculated is issued and approved by NRC..
7. Design Margin The calculation established the acceptance criterion for the pressure decay time to ascerain the valve functionality. A design margin is not applicable for this calculation.

CC TITLE 1Cu D) LTA IDNNO.C J- 1S SHEET 0 SI<7 REFERENCE 4 ORIGINATOR V-cclgufM'l Oc CitlW3&A I

l Vr-iih-10 _ 40OF CALCULATION DATE Q2 JAr5uI36 25PF.eVL  ; n2r2 _ _

_D CONTINUATION SHEET PEER REVIEW CL4( jLt DATE iZ- l____57 ______

8. REFERENCES,
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DE-AP.ZZ-0002(Q) ATTACHMENT 2 DE-AP.ZZ-0002(Q) ATVACHMENT 2

Document Control Desk Attachment 2 LR-N05-0424 INSERVICE INSPECTION PROGRAM RELIEF REQUESTS S1-RR-04-VOI and V02 SALEM GENERATING STATION UNIT 1 FACILITY OPERATING LICENSE NO. DPR-70 DOCKET NO. 50-272

Document Control Desk Attachment 2 LR-N05-0424 Salem Unitl Inservice Test Program VALVE RELIEF REQUEST Sl -RR-04-VOI COMPONENTS: 11SJ55, 12SJ55, 13SJ55 and, 14SJ55 FUNCTION:

These check valves are located in the discharge lines from the respective safety injection accumulators. The valves perform an active safety function in the open and closed positions. The valves must be capable of opening during a large break Loss of Coolant Accident (LOCA) to provide a flow path for Safety Injection (SI) accumulator discharge to the Reactor Coolant System (RCS) cold legs when reactor pressure drops below accumulator pressure. The valve must be capable of closure to prevent divergence of safety injection and recirculation flow subsequent to the accumulators dumping their contents. This valve also functions as an RCS pressure isolation valve.

This function prevents exposing the SI accumulators to RCS pressure that would compromise accumulator pressure boundary integrity.

CATEGORY: AC CLASS: 1 TEST REQUIREMENTS:

Open & Closed Position - Check valves shall be exercised at least once every 3 months in accordance with the requirements of OMa-1988, Part 10-4.3.2.1.

BASIS FOR RELIEF:

During power operation, these valves are maintained in the closed position by RCS pressure on the downstream side of the valve disk. Quarterly exercising these valves to the full or partially open position during power operation is impracticable because the only flow path is into the RCS. The operating accumulator pressure cannot overcome normal operating RCS pressure to establish flow. Full stroke exercising these valves at cold shutdown is impracticable because of' the potential for low temperature over pressurization due to insufficient expansion volume in the RCS to accept required flow.

This testing could also result in the intrusion of nitrogen into the core, which could interrupt the normal circulation of cooling water flow. The associated motor-operated isolation valve (one per accumulator) cannot be partially stroked, but must complete a full stroke before changing direction. This could cause a complete discharge of the water volume in the accumulator and possibly inject nitrogen into the reactor coolant system, causing gas binding of the residual heat removal pumps and a subsequent loss of shutdown cooling. These valves are also verified to close by leak testing per plant technical specifications for Pressure Isolation Valves (PIV\s). Reverse exercising these check valves at any time other than refueling is burdensome without a commensurate increase in the level of quality and safety. The valves are normally in the closed position. Accumulator pressure is continuously monitored to ensure that an adequate nitrogen blanket is maintained and to verify the lack of RCS inleakage.

I

Document Control Desk Attachment 2 LR-N05-0424 ALTERNATE TESTING:

These check valves shall be full stroke exercised to the open position during refueling utilizing a reduced pressure, partial accident flow test method. This controlled method is performed with the reactor vessel head removed. The test method establishes accumulator pressure of 70 psig, accumulator level between 96 and 100% and refueling cavity level between 125.5 and 126.5 feet. After establishment of the fixed parameters, the test then measures the time interval required for the pressure in the associated safety injection accumulator to drop from an initial pressure to 35 psig. Engineering calculation S-1 -SJ-MDC-1 539 Rev. 2, "Accumulator Pressure Decay Time During Discharge Test" establishes the test conditions and acceptance criterion and concludes that this methodology is adequate in determining the associated check valve disk moves to the full open position. Information from other nuclear stations was reviewed regarding partial flow, full stroke exercising using a calculational method. The testing performed at Salem provides a valid methodology for verifying the open function even though the test method differs from the various methods reviewed. Approval of the methodology described above (and in calculation S-1 -SJ-MDC-1 539 Rev. 2) will allow for establishing acceptance criteria if changes are made to accumulator motor operator discharge valve stroke times.

In attempting to utilize the guidance of NUREG 1482, Section 4.1.2- "Exercising Check Valves with Flow and Nonintrusive Techniques", nonintrusive equipment was used during informational testing. These valves are Darling Valve & Manufacturing Co. "Clear Waterway" swing checks that are fabricated without a backstop. The valve design permits the disk to move sufficiently out of the flow path without contacting the valve body. Nonintrusive testing using acoustic and magnetic technology provides sufficient data for monitoring degradation on a periodic basis; however, full open acoustic indication is not detected nor is expected to show on the test trace. Nonintrusive testing does not verify full stroke exercising, however occasional use of this equipment during the pressure decay test provides useful condition monitoring information.

This method of forward flow check valve testing complies with the guidance provided in Generic Letter 89-04, Attachment 1, Position 1.

Regarding reverse flow exercise testing, these valves shall be verified in the closed position during the process of performing seat leakage testing at the frequency specified in Unit I Technical Specification (TS) 4.4.6.3 and Unit 2 TS 4.4.7.2.2.

The open stroke frequency change was previously approved in NRC Safety Evaluation April 15, 1994 (TAC Nos. M88144 and M88145)

The use of the alternate testing methodology was previously approved in NRC Safety Evaluation March 12, 1999 (TAC Nos. M98259 and M98260) 2

Document Control Desk Attachment 2 LR-N05-0424 Salem Unit I Inservice Test Program VALVE RELIEF REQUEST S1-RR-04-V02 COMPONENTS: 11 SJ56, 12SJ56, 13SJ56 and, 14SJ56 FUNCTION:

These check valves are located inthe discharge lines from the respective safety injection accumulators downstream of the branch connection from Residual Heat Removal System (RHR). The valves perform an active safety function in the open position. The valves must be capable of opening during, a large break Loss of Coolant Accident (LOCA) to provide a flow path for Safety Injection (SI) accumulator discharge to the Reactor Coolant System (RCS) cold legs when reactor pressure drops below accumulator pressure. The valve must also be capable of opening to provide a path for low head safety injection and cold leg recirculation flow. This valve also functions as an RCS pressure isolation valve. This function prevents exposing the SI accumulators and RHR system piping to RCS pressure.

CATEGORY: AC CLASS: 1 TEST REQUIREMENTS:

Open & Closed Position - Check valves shall be exercised at least once every 3 months, in accordance with the requirements of OMa-1 988, Part 10-4.3.2.1.

BASIS FOR RELIEF:

During power operation, these valves are maintained in the closed position by RCS pressure on the downstream side of the valve disk. Quarterly exercising these valves to the full or partially open position during power operation is impracticable because the only flow path is into the RCS. The operating accumulator pressure cannot overcome normal operating RCS pressure to establish flow. Full stroke exercising these valves at cold shutdown is impracticable because of the potential for low temperature over pressurization due to insufficient expansion volume in the RCS to accept required flow. This testing could also result in the intrusion of nitrogen into the core, which could interrupt the normal circulation of cooling water flow. The associated motor-operated isolation valve (one per accumulator) cannot be partially stroked, but must complete a full stroke before changing direction. This could cause a complete discharge of the water volume in the accumulator and possibly inject nitrogen into the reactor coolant system, causing gas binding of the residual heat removal pumps and a subsequent loss of shutdown cooling.

These valves are also verified to close by leak testing per plant technical specifications for Pressure Isolation Valves (PlV's). Reverse exercising these check valves at any time other than refueling is burdensome without a commensurate increase in the level of quality and safety.

ALTERNATE TESTING:

These check valves shall be full stroke exercised to the open position during refueling utilizing a reduced pressure, partial accident flow test method. This controlled method is performed with the reactor vessel head removed. The test method establishes accumulator pressure between 3

Document Control Desk Attachment 2 LR-N05-0424 67 and 70 psig, accumulator level between 96 and 100% and refueling cavity level between 125.5 and 126.5 feet. After establishment of the fixed parameters the test then measures the time interval required for the pressure in the associated safety injection accumulator to drop from an initial pressure to 35 psig. Engineering calculation S-1 -SJ-MDC-1 539 Rev. 2, "Accumulator Pressure Decay Time During Discharge Test" establishes the test conditions and acceptance criterion and concludes that this methodology is adequate in determining that the associated check valve disk moves to the full open position. Information from other nuclear stations was reviewed regarding partial flow, full stroke exercising using a calculational method.

The testing performed at Salem provides a valid methodology for verifying the open function even though the test method differs from the various methods reviewed. Approval of the methodology described above (and in calculation S-1 -SJ-MDC-1 539 Rev. 2) will allow for establishing acceptance criteria if changes are made to accumulator motor operator discharge valve stroke times.

In attempting to utilize the guidance of NUREG 1482, Section 4.1.2 - "Exercising Check Valves with Flow and Nonintrusive Techniques", nonintrusive equipment was used during informational testing. These valves are Darling Valve & Manufacturing Co. "Clear Waterway" swing checks that are fabricated without a backstop. The valve design permits the disk to move sufficiently out of the flow path without contacting the valve body. Nonintrusive testing using acoustic and magnetic technology provides sufficient data for monitoring degradation on a periodic basis; however, full open acoustic indication is not detected nor is expected to show on the test trace.

Nonintrusive testing does not verify full stroke exercising however occasional use of this equipment during the pressure decay test provides useful condition monitoring information.

The valves shall be partial stroke exercised at cold shutdown during normal RHR shutdown cooling operations.

This method of forward flow check valve testing complies with the guidance provided in Generic Letter 89-04, Attachment 1, Position 1.

Regarding reverse flow exercise testing, these valves shall be verified in the closed position during the process of performing seat leakage testing at the frequency specified in Unit 1 Technical Specification (TS) 4.4.6.3 and Unit 2 TS 4.4.7.2.2 The open stroke frequency change was previously approved in NRC Safety Evaluation April 15, 1994 (TAC Nos. M88144 and M88145).

The use of the alternate testing methodology was previously approved in NRC Safety Evaluation March 12,1999 (TAC Nos. M98259 and M98260) 4

Document Control Desk Attachment 3 LR-N05-0424 INSERVICE INSPECTION PROGRAM RELIEF REQUESTS S1-RR-04-VOI and V02 SALEM GENERATING STATION UNIT I FACILITY OPERATING LICENSE NO. DPR-70 DOCKET NO. 50-272 General Approach Proposed For Full Open Testing Of Accumulator Check Valves

Document Control Desk Attachment 3 LR-N05-0424 General Approach Proposed For Full Open Testing Of Accumulator Check Valves PSEG procedure S1.01P-ST.SJ-0006 (Q), Inservice Testing Safety Injection Valves Mode 6, provides instructions necessary to perform Inservice Inspection and Testing IAW Technical Specification 4.0.5 for the following Safety Injection (Accumulator) check valves:

o 11SJ55 and 11 SJ56 - 13 Accumulator Discharge to Cold Leg o 12SJ55 and 12SJ56 - 14 Accumulator Discharge to Cold Leg o 13SJ55 and 13SJ56 - 13 Accumulator Discharge to Cold Leg o 14SJ55 and 14SJ56 - 14 Accumulator Discharge to Cold Leg The testing procedure involves open-stroke testing each tank's discharge check valves with the reactor depressurized and the vessel head removed. The initial tank liquid volume is set to 96 - 100%, and initial tank pressure is set at 70 psig. Flow is initiated by opening the tank motor operated valve (MOV). Per the procedure, the valve is to be stroked fully open, left in the open position until the Accumulator reaches a pressure of 35 psig, and then closed. Tank pressure is set low enough to prevent injection of nitrogen gas into the reactor coolant system (RCS). Velocities achieved should also be sufficient to fully stroke the valves, according to calculation.

The bases for the testing are captured in Calculation No. S-1-SJ-MDC-1 539 Rev.2, Accumulator Pressure Decay Time During Discharge Test. The purpose of this calculation is to establish a mathematical model of test conditions to develop acceptance criterion for establishing the valves tested go full open. The description below describes the calculation with reactor head removed as is currently performed during testing.

The following parameters are fixed by procedure:

o The Unit is in Mode 6 (Defueled) with the Upper Intemals installed.

o Safety Injection Accumulators are at a fixed and defined pressure.

o Safety Injection Accumulators are at a fixed and defined level.

o Refueling Cavity is at a fixed and defined level.

o Acceptance criteria - Maximum blowdown time in seconds.

o Failure of testing to result in corrective action for both SJ55 and 56.

During valve stroking, Accumulator pressure and level measurements, which are acquired from inputs from normal plant instrumentation, are recorded. Based on the measured level and pressure change with time, the relationship between the check valve disc angle, flow rate and pressure difference are calculated using information supplied by Westinghouse Letter PSE 530 for full lift velocity for the valves being tested. The loss factor for the MOV isolation valve as well as friction losses associated 1

Document Control Desk Attachment 3 LR-N05-0424 with the piping system is calculated. Equations of motion are then solved simultaneously.

The calculation solves six unknown variables simultaneously using a FORTRAN computer program. The following are calculated to determine flow and pressure at a point in time under a variety of disc angles:

o Accumulator level elevation o Accumulator gas pressure o MOV loss factor o Check valve Delta P o Derivatives o Values at new time step 2

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