BSEP-96-0051, Forwards Response to GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves
| ML20097G007 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 02/13/1996 |
| From: | Campbell W CAROLINA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| BSEP-96-0051, BSEP-96-51, GL-95-07, GL-95-7, NUDOCS 9602200338 | |
| Download: ML20097G007 (29) | |
Text
- - - . ..
- , S
, m.
l CP&L Carolino Power & Light C- ,xy William R. Campbell PO Box 10429 Vice President Southport NC 28461-0429 Brunswick Nuclear Plant -
i SERIAL: BSEP 96-0051 February 13,1996 United States Nuclear Regulatory Commission ATTENTION: Document Control Desk
- Washington, DC 20555 BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS.1 AND 2 DOCKET NOS. 50-325 & 50-324/ LICENSE NOS. DPR-71 & DPR-62 RESPONSE TO THE NRC GENERIC LETTER 95-07, " PRESSURE LOCKING AND THERMAL
' BINDING OF SAFETY-RELATED POWER-OPERATED GATE VALVES" Gentlemen:
On August 17,1995, the NRC issued Generic Letter 95 07, " Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves." In our December 6,
.1995, submittal (Serial: BSEP 95-0619), CP&L agreed to provide within 180 days from the date of the generic letter, a summary of the valves identified as susceptible to pressure locking or thermal binding and a schedule for corrective actions. The remainder of the 180
- day requested information will be submitted prior to April 26,1996. The following enclosures, provide CP&L's response.
Please refer any questions regarding this letter to Mr. George Honma at (910) 457-2741.
Sincerely, William R. Campbell GMT/gmt
Enclosure:
- 1. Response
- 2. Applicability Screen
- 3. Susceptibility Screen
- 4. Summary of Proposed Corrective Actions
- 5. Prior Related Modifications
- 6. List of Regulatory Commitments 9602200338 960213 -
PDR - ADOCK 05000324 Tel 910 457 2496 Fox 910 457-2803 m _ _ - -
D'ocum$nt Control Dssk BSEP 96-0051/ Pags 2 William R. Campbell, having been first duly sworn, did depose and say that the information contained herein is true and correct to the best of his information, knowledge and belief; and the sources of his information are officers, employees, and agents of Carolina Power & Light Company.
(
% < 1~ .
My commission expires: Ikib cc: Mr. S. D. Ebneter, NRC Regional Administrator, Region 11 Mr. C. A. Patterson, NRC Senior Resident inspector - Brunswick Plant Mr. D. C. Trimble, Jr., NRR Project Manager - Brunswick Plant The Honorable H. Wells, Chairman - North Carolina Utilities Commission l
i ENCLOSURE 1 BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 NRC DOCKET NOS. 50-325 & 50-324 OPERATING LICENSE NOS. DPR-71 & DPR-62 RESPONSE TO THE NRC GENERIC LETTER 95-07, " PRESSURE LOCKING AND THERMAL BINDING OF SAFETY-RELATED POWER-OPERATED GATE VALVES "
Reauested Actions NRC 180-Dav Reauested Information Generic Letter 95-07 requested that a summary description of the following information be submitted within 180 days of the date of the Generic Letter:
- 1. The susceptibility evaluation of operational configurations performed in response to (or consistent with) 180-day Requested Action 1, and the further analysis performed in response to (or consistent with) 180-day Requested Action 2, including the bases or criteria for determining that valves are or are not susceptible to pressure locking or thermal binding;
- 2. The results of the susceptibility evaluation and the further analyses referred to in 1 above, including a listing of the susceptible valves identified;
- 3. The corrective actions, or other dispositioning, for the valves identified as susceptible to pressure locking or thermal binding, including: (a) equipment or procedural modifications completed and planned (including the completion schedule for such actions); and (b) justification for any determination that l particular safety-related power-operated gate valves susceptible to pressure locking or thermalbinding are acceptable as is.
CP&L Respon. jig In our December 6,1995, submittal (Serial: BSEP 95-0619), CP&L agreed to provide within 180 days from the date of the generic letter, a summary of the valves identified as susceptible to pressure locking or thermal binding and a schedule for corrective actions. The remainder of the 180 day requested information will be submitted prior to April 26,1996.
The criteria for determining susceptibility to pressure locking or thermal binding are ,
provided in CP&L's Nuclear Engineering Department, Chief Engineering Section Program Document MECH-002. They are summarized as follows:
Criteria for Determining Potential Suceptibility to Pressure Locking
- 1. Solid wedge gate valves are considered not susceptible to pressure locking and no further screening is required.
El-1 {
A
1 ll
' ^
- 2. Othhr typss of gate valvss, such as doubis-disc and finx-wedgs, cra potentillly suscrptibl3 to prassure locking. If a valve is provided with a -
~
. pressure locking mitigating feature, such as a hole drilled in the disc, no further screening is required.
- 3. Valves other than solid wedge gate valves, or those with pressure locking mitigating features, may be susceptible to hydraulically induced pressure -i locking. .This may occur if a mechanism exists to trap high pressure within l
the bonnet of a valve, followed by de-pressurization of the connected piping. l The mechanism of pressure entrapment may be the result of a LOCA, a ;
pump trip, reactor de-pressurization, or a hydrostatic test.
l
- 4. Valves other than solid wedge gate valves, or those with pressure locking ,
mitigating features, may be susceptible to thermally induced pressure !
locking. This may occur if water within the bonnet cavity is heated while. '
the valve is closed. Heating may occur by conduction or convection through
- connecting piping, or heat may be applied from the environment around the ,
valve. Valves where the process medium is a compressible fluid other than ;
steam are not susceptible to thermally-induced pressure locking. '
Criteria for Determining Potential Suceptibility to Thermal Binding !
- 1. Solid wedge gate valves and flex-wedge gate valves are considered potentially susceptible to thermal binding. Double-disc gate valves are not susceptible to thermal binding, i
- 2. If a valve is procedurally controlled to mitigate the effects of thermal i binding, no further review is required. ,
s
- 3. If the maximum operating temperature of a valve does not exceed 200 F, it :
is considered to be not susceptible to thermal binding. ~!
- 4. If a solid wedge gate valve cools no more than 50 F after closure, or the !
differential temperature across the valve is no more than 50 F, then the valve is not considered susceptible to thermal binding. !
- 5. If a flex-wedge gate valve cools no more than 100 F after closure, or the h differential temperature across the valve is no more than 100*F, then the valve is not considered susceptible to thermal binding.
(
CP&L's Brunswick Steam Electric Plant, Unit Nos.1 and 2 has implemented the .h requested actions of Generic Letter 95-07 as described in the attached enclosures: i i
6 9
d h 4
El-2
_ - _ __ .~- _ _ -_ _ _. _ . - - ,
. _ . - _ . _. . _ . .- _ . _ , . _ _ . . . . _ _ _ _ . . . _ _ . _ ._. _- - _ _ . . _ . . , _ . _ . _ _ . _ . ~
L . ENCLOSURE 2/ .
BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 ;
NRC DOCKET NOS. 50-325 & 50-324'
- OPERATING LICENSE NOS. DPR-71 & DPR-621 '. ,
4 RESPONSE TO THE NRC GENERIC LETTER 90-07, " PRESSURE LOCKING AND THERMAL BINDING OF .-
SAFETY-RELATED POWER-OPERATED GATE VALVES " -
. .t GL 95-07 APPLICABILITY SCREEN VALVE TAG VALVE FUNCTION - ' VALVE DESCRIPTION ACTUATOR DESCRIPTION GL 95-07 APPUCABluTY-4 DtSC SIZE CLASS VFNDOR TYPE StZE ' VENDOR- DESIGN NORMALLY OR GL 95-07 .
f TYPE. BASIS OCCASIONALLY APPUCABLE?
SAFETY CLOSED?
FUNCTION 1-821-FOl6 MSL DRAN INBOARD ISOLATION DOUBLE 3 900 ANCHOR- MOV SMB-00 UMITOROUE CLOSE YES NO VALVE DARLNG !
(1) 1-B21-F019 MSL DRAW OUTBOARD ISOLATION DOUBLE 3 900 AMCHOR- 'MOV SMB UMITOROUE 'CLOSE YES NO 111 VALVE DARLNG ,
1-832-F031 A REORC PUMP A DISCHARGE VALVE DOUBLE 28 600 DARUNG MOV SB-2 UMITORQUE - CLOSE NO NO 1-832-F031 B REORC PUMP B DISCHARGE VALVE DOUBLE 23 600 DARUNG MOV SE2 LIMITOROUE CLOSE NO NO 1-832-F032A RECIRC PUMP A DISCHARGE BYPASS DOUBLE 4 DARLNG MOV SMB-000 LIMITORQUE CLOSE NO NO VALVE 1-832-F0328 REORC PUMP B DISCHARGE BYPAS$ DOUBLE 4 DARLNG MOV SMB-000 UMITOROUE CLOSE NO NO
- VALVE 1-832 V14 REORC PUMP 1 A SEAL STAGING SOLID 3/4 600 VELAN AOV 36RN122 K-M REMAN NO NO
, VALVE SP184 OPEN 1-832-V17 RECIRC PUMP 18 SEAL STAGING SOUD 3/4 600 VELAN AOV 36RN122 K-M REMAN NO NO l VALVE SP184 OPEN 1-E11-FOO7A RHR MMIMUM FLOW BYPASS VALVE FLEX 4 300 ANCHOR- MOV SMB-000 - UMITOROUE OPEN/ YES YES DARUNG CLOSE 1-E11 F0078 RHR MINIMUM FLOW BYPASS VALVE FLEX 4 300 ANCHOR- MOV SMB-000 LIMITORQUE OPEN/ YES YES DARLING CLOSE 1?E11-F008 SHUTDOWN COOLNG OUTBOARD FLEX 20 600 ANCHOfi- MOV SB-3 UMITORQUE CLOSE YES NO SUCTION ISOLATION VALVE DARLNG
- 1-E11-F009 SHUTDOWN COOLING NBOARD FLEX 20 600 ANCHOR- MOV SE2 -UMITOROUE CLOSE YES NO SUCTION ISOLATION VALVE DARLING
[1] These were originally flex-wedge gate valves and were replaced with double-disc gate valves as a result of a prior thermal binding review.
E2-1 4
_.___._.._.______._.___..m... . _ . _ _ _ _ _ _ _.z-_ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ . _ _ . - _ _ _ _ _ _ _ _ _ . _ _ _ ________e..w-*._-__m- mt. ____m. - - - - - . .
GL 954)7- APPLICABILITY SCREEN - ,
VALVE TAG VALVE FUNCTION VALVE DESCRIPTION ' ' ACTUATOR DESCRIPTION GL 95-07 APPUCABILITY ' .,
DISC SIZE CLASS VENOOR TYPE SIZE VENDOR DESIGN NORMALLY OR - GL 95-07 TYPE BASIS OCCASIONALLY APPUCABLEF SAFETY - CLOSED 7 :
ruMCnON 1-E11-F011 A RHR HEAT EXCHANGER 1 A DRAW TO FLEX 4 300 ANCHOR- MOV SMB-000 LIMITOROUE CLOSE YES' NO SUPPRESSION POOL VALVE DARLNG 1-E11 F011B RHR HEAT EXCHANGER 18 DRAN TO FLEX 4 300 ANCHOR- MOV SMB-000 LMTOROUE CLOSE YES- NO SUPPRESSION POOL VALVE DARLNG 1-E11-F015A LPCI NBOARD NJECTION VALVE FLEX 24 900 ANCHOR- MOV SB-4 LMTOROUE OPEN YES YES 12] DARLNG 1-E11-F015B LPCI NBOARD INJECTION VALVE FLEX 24 900 ANCHOR- MOV SB-4 LIMITOROUE OPEN YES YES (2) DARLING 1-E11-F028A SUPPRESSION POOL DISCHARGE FLEX 16 300 ANCHOR- MOV SMB-1 LMTOROUE OPEN/ . YES .- YES ISOLATION VALVE DARLNG CLOSE 1-E11-F0288 SUPPRESSION POOL DtSCHARGE FLEX 16 300 ANCHOR- MOV SMB1 LIMITOROUE OPEN/ ~YES YES ISOLATION VALVE DARLING CLOSE 1-E11-F040 MHR TO RADWASTE OUTBOARD FLEX 4 300 ANCHOR- MOV SMS-000 LIMITOROLT CLOSE YES NO ISOLATION VALVE DARLING 1-E11-F047A RHR HEAT EXCHANGER 1 A INLET FLEX 16 300 ANCHOR- MOV SMB1 LMTOROUE REMAN YES NO
. [3] VALVE DARLNG OPEN 1-E 11-F0478 RHR HEAT EXCHANGER 18 NLET FLEX 16 300 ANCHOR- MOV SMB-1 LMTOROUE REMAN YES NO 131 VALVE DARLING OPEN
[2] The high-pressure discs in these valves were drilled as a result of a prior pressure locking review.
[3] These valves are not within the scope of GL 95-07, but were evaluated at the discretion of the PLTB review group.
E2-2
4 i>
GL 95-07 APPLICABILITY SCREEN , --
VALVE TAG VALVE FUNCTION VALVE DESCRIPTION ACTUATOR DESCRIPTION - GL 95-07 APPUCABILITY ,
DISC SIZE CLASS . VENDOR TYPE SIZE VENDOR DESIGN NORMALLY OR GL 95-07 ,
1 TYPE BASIS OCCASIONALLY APPUCABLE? ,
SAFETY I
, CLOSED? . - ',
CORE SPRAY OUTBOARD FLEX 10 600 ANCHOR- MOV- SB-1 UMITOROUE OPEN YES YES
]
1-E21-FOO4A E
NJECTION VALVE DARLNG ,
1 1-E21-F0048 CORE SPRAY OUTBOARD FLEX 10 600 ANCHOR- MOV SB-1 UMTOROUE OPEN YES -YES L INJECTION VALVE DARLNG 1-E21-FOC5A CORE SPRAY INBOARD NJECTION FLEX 10 600 ANCHOR- MOV SB-1 UMTOROUE OPEN ~ YES YES f' 141 VALVE DARLNG 1-E21-FOO58 CORE SPRAY INBOARD NJECTION FLEX 10 600 ANCHOR- MOV SB-1 UMTOROUE OPEN YES YES [
141 VALVE DARLNG l
1-E21-FO31 A CORE SPRAY MINIMUM FLOW FLEX 3 300 ANCHOR- MOV SMB-000 UMTOROUE OPEN/ YES YES BYPASS VALVE DARLING CLOSE 1-E21-F0318 CORE SPRAY MINtMUM FLOW FLEX 3 300 ANCHOR- MOV SMB-000 UMITOROUE OPEN/ YES YES BYPASS VALVE DARLNG CLOSE E 1-E41-FOO1 HPCI TURBINE STEAM SUPPLY DOUBLE 10 600 ANCHOR- MOV SB-1 UMTORQUE OPEN YES YES [
151 VALVE DARLING
{
t 1-E41-FOO2 STEAM SUPPLY INBOARD DOUBLE 10 600 ANCHOR- MOV SMB-1 LIMITOROUE CLOSE YES NO 15] ISOLATION VALVE DARLNG ,
{ 1-E41-FOO3 STEAM SUPPLY OUTBOARD DOUBLE 10 600 ANCHOR- MOV SMB-1 LIMTORQUE CLOSE 'YES NO I 151 ISOLATION VALVE DARLNG j 1-E41-FOO4 CONDENSATE STORAGE TANK FLEX 16 150 ANCHOR- MOV SMEOO UMITOROUE CLOSE YES NO- ,
SUCTION VALVE DARLNG l
,-E41-FOC6 HPCIINJECTION VALVE DOUBLE 14 900 ANCHOR- MOV SB-2 UMITOROUE OPEN YES YES- l 151 DARUNG j 1-E41-F011 REP *** DANT ISOLATION TO FLEX 10 900 ANCHOR- MOV SMB-1 UMTOROUE CLOSE- YES NO !
CONDENSATE STORAGE TANK DARUNG l VALVE ;
- 4] The ligh-pressure discs in these valves were drilled as a result of a pnor pressure locking review.
[5] These were originally flex-wedge gate valves. They were replaced with double 4isc gate valves as a result of a prior themal binding ;
review. Also, holes were drilled in the high-pressure discs of the HPCI Turbine Steam Admission Valve and the HPCI Injection Valve j as a result of a prior pressure locking review. i I
E2-3 I
_ . _ _ _ . . _ . . _ _ . . _ . _ _ _ _ . _ . _ _ _ . _ _ . _ _ _ _ . _ _ . _ . . _ _ . . _ _ . . _ . _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___._m _ _ _ . _ . _ _ . _ _ _ . _ _ _ _ _ _ _ . _ _ _ _ . _ _ _ _ _ _ _ .__
, m ,# . . . . . ,,. - . ...o m -. . u u_ _ . . . . . ..
- . t l GL 95-07 APPLICABILITY SCREEN . ,
VALVE TAG _ VALVE FUNCTION VALVE DESCRIPTION - ACTUATOR DESCRIPTION GL 95-07 APPUCA8K.ITY ,
i DISC SIZE CLASS VENDOR TYPE ~ SIZE VENDOR DESIGN - NORMALLY OR _ GL 95-07 ' -
4 TYPE BASIS OCCASIONALLY. APPUCA8LEP [
SAFETY CLOSED? . .
FUNCTION 5 600 AOV 1-E41f025 HPCI CONO PUMP DISCH OUTBOARD SOUD 1 VELAN 37RN122 K-M CLOSE YES NO '
ISOL VALVE TO CRW SP236 i 1-E41-F026 HPCI COND PUMP DISCH INBOARD SOUD 1' 600 VELAN AOV 37RN122 K-M CLOSE YES NO -!
ISOL VALVE TO CRW SP236 f 1-E41-F041 SUPPRESSION POOL SUCTION VALVE FLEX 16 150 ANCHOR-~ MOV SMB-00 LIMITOROUE OPEN YES YES DARUNG 1-E41-F042 SUPPRESSION POOL SUCTION VALVE FLEX 16 150 ANCHOR- MOV SMEFOO UMITOROUE OPEN YES YES-DARUNG ,
1-E 51-F004 ROC COND PUMP OtSCH INBOARD SOUD 1 600 VELAN AOV 37RN122 K-M CLOSE YES NO ISOL VALVE TO CRW SP236 j
)
i 1-E51-FOO5 RCIC COND PUMP DISCH OUTBOARD SOUD 1 600 VELAN - AOV 37RN122 K-M CLOSE YES NO -
SP236 !
ISOL VALVE TO CRW 1 I 1 -E51-FOO7 RCIC STEAM SUPPLY IN80ARD DOUBLE 3 900 ANCHOR- MOV SMB-OO UMITORQUE CLOSE YES NO l ISOLATION VALVE DARLING ,
1-E51-F008 RCIC STEAM SUPPLY OUTBOARD DOUBLE 3 900 ANCHOR- MOV SMB-00 UMITOROUE CLOSE YES NO.
ISOLATION VALVE DARLING 1-E51-F010 CONDENSATE STORAGE TANK FLEX 6 150 ANCHOR- MOV SMEOO . LIMITOROUE OPEN/ YES YES [
SUCTION VALVE - DARLING CLOSE ;
-t 1-E51-F013 ROC INJECTION VALVE DOUBLE 4 900 ANCHOR- MOV SMB-OO UMITOROUE OPEN/ YES YES 161. 171 DARUNG CLOSE j 1-E51-F029 SUPPRESSION POOL SUCTION VALVE FLEX 6 150 . ANCHOR- MOV SM&00 UMITOROUE OPEN - YES YES
[71 DARUNG [
1-E51-F031 SUPPRESSION POOL SUCTION VALVE FLEX 6 150 ANCHOR- MOV SMS-00 UMITORQUE OPEN . YES YES [
17] DARUNG j
, 6] This was originally a flex-wedge gate va ve. It was replaced with a double-disc gate valve as a result of a prior thermal binding review. :
Also, a hole was drilled in the high-pressure disc as a result of a prior pressure locking review. j i
- [7] RCIC is not a safety-mlated system. However, it has PRA significance, so these valves were included in the scope of the GL 954)7 -
review.
i
[
t E2-4
. - _ . , _ - . . . ~ ~ _ . . - . - - , -c... - . _ _ _ _ _ ____________.________._,-___o . _ _ _ _ _ _ __m___ _.__________m
I 3
GL 95-07 APPLICABILITY SCREEN - ,
i VALVE TAG VALVE FUNCTION VALVE DESCRIPTION ACTUATOR DESCRIPTION GL 95-07 APPUCAB10TY ,
DISC SIZE CLASS VENDOR . TYPE SIZE VENDOR DESIGN NORMALLY OR GL 95-07 TYPE BASIS OCCASIONALLY APPUCABLE7 SAFETY CLOSED? -
pm r i
1-Gl&FOO3 DRYWELL FLOOR DRAN INBOARD FLEX 3 150 ANCHOR AOV A61B MILLER CLOSE YES- NO ISOLATION VALVE 1-G16-FOO4 DRYWELL FLOOR DRAIN OUTBOARD FLEX 3 150 ANCHOR AOV A618 MILLER CLOSE YES NO d
ISOLATION VALVE 1
1-G1&F019 DRYWELL EQUIPMENT DRAN INBOARD . FLEX 3 150 ANCHOR AOV A61B MILLER CLOSE YES' NO ^[
ISOLATION VALVE 1-G16-F020 DRYWELL EQUIPMENT DRAN FLEX 3 150 ANCHOR AOV A61B MILLER CLOSE YES NO OUTBOARD ISOLATION VALVE 1-G 31-FOO1 RWCU NLET' INBOARD ISOLATION DOUBLE 6 900 ANCHOR- MOV SMB-OO UMITOROUE CLOSE YES NO ISI VALVE DARLING ,
1-G31-FOO4 RWCU NLET OUTBOARD ISOLATION DOUBLE 6 900 ANCHOR- MOV SMB-OO UMITORQUE CLOSE YES NO (81 VALVE DARLING i I
[91 PRECOAT PUMP SP236 SAFETY f f
1-RCC-V54 DRYWELL EQUIPMENT DRAIN HX . SOUD 2 600 VELAN AOV 60RN155 K-M NON- NO NO l 191 RBCCW INLET VALVE SP174 SAFETY 1-RCC-V73 CRD PUMP 1B COOLING WATER INLET 5000 1 600 VELAN AOV 37RN122 K-M NON- NO NO 191 VALVE SP236 SAFETY 1-RCC-V74 CRD PUMP 1 A COOLNG WATER HLET SOUD 1 600 VELAN AOV 37RN122 K-M NON- NO NO 191 VALVE SP236 SAFETY 1-RCC-V76 REACTOR BUtLDING EQUIPMENT DRAN SOUD 2 600 VELAN AOV 60RN155 K-M NON ' NO NO 19] HX INLET VALVE SP174 SAFETY
[8] These valves have no safety function to open. However, the original flex-wedge gate valves were replaced with double-disc gate valves during a prior thermal binding review. Additionally, holes were drilled in the high-pressure discs as a result of a prior pressure locking 3 review.
I
[9] These valves have no safety function to open. However, PLTB evaluations were performed at the discretion of the PLTB review group.
P E2-5 i i
t I
GL 95-07. APPLICABILITY SCREEN- ,
VALVE TAG VALVE FUNCTION VALVE DESCRIPTION ACTUATOR DESCRIPTION GL 95-07 APPUCABILITY . ,
DISC SIZE CLASS VENDOR TYPE SIZE VENDOR DESIGN NORMALLY OR GL 95-07 TYPE BASIS OCCASIONALLY APPUCABLE7 '
SAFETY .. CLOSED 7 ,
ruNCriON -
2-B21-F016 MSL DRAN INBOARD ISOLATION DOUBLE 3 900 ANCHOR- MOV SMB-OO UMITOROUE CLOSE' YES NO -
11 01 VALVE DARLNG 2-B21-F019 MSL DRAIN OUTBOARD DOUBLE 3 900 ANCHOR-- MOV SMB-OO UMITOROUE CLOSE YES NO 11 01 ISOLATION VALVE DARUNG 2-832-F031 A REORC PUMP A DISCHARGE DOUBLE 28 600 DARUNG MOV SB-2 UMITOROUE CLOSE NO NO VALVE 2-832-F031B RECIRC PUMP B DISCHARGE DOUBLE 28 600 DARUNG MOV SB-2 UMITOROUE CLOSE NO NO
-VALVE 2-832-F032A REORC PUMP A DISCHARGE DOUBLE 4 DARLNG MOV SMB-000 UMITOROUE - CLOSE NO NO BYPASS VALVE 2-832-F0328 REORC PUMP B DISCHARGE DOUBLE 4 DARUNG MOV SMB-000 UMITOROUE CLOSE NO- NO BYPASS VALVE 2-832-V14 REORC PUMP 2A SEAL STAGNG SOLID 3/4 600- VELAN AOV 36RN122 K-M REMAIN NO NO VALVE SP184 OPEN 2-832-V17 REORC PUMP 28 SEAL STAGING SOLID 3/4 600 VELAN AOV 36RN122 K-M REMAIN NO NO VALVE SP184 OPEN
[10] These were originally flex-wedge gate valves. They were replaced with double-disc gate valves as a result of a prior thermal binding review.
)
E2-6
j GL 95-07 APPLICABILITY SCREEN-
- i t
VALVE TAG . VALVE FUNCTION VALVE DESCRIPTION ACTUATOR DESCf4PTION GL 95-07 APPUCA8IUTY
.- - OtSC SIZE CLASS VENDOR TYPE SIZE VENDOR- DESIGN NORMALLY OR . GI. 95-07 '
i TYPE - BASIS OCCASIONALLY APPUCASLE7 '
SAFETY CLOSED? , !
FUNCTION .
i 2-CAC CV-2698 CAC MERTING LN2 TANIC SOLID 3/4 150 GODDARD AOV J255 GODDARD - NON- NO NO 1111 VACUUM UNE VALVE SAFETY f 2-CAC-CV-2713 CAD VAPORIZER A INLET SOUD 3/4 150 GODDARD AOV J255 GODDARD OPEN YES YES ,
Illi VALVE
! 2-CAC-CV-2714 CAD VAPORIZER 8 WLET SOLtD 3/4 150 GODDARD AOV J255 GODDARD OPEN- YES YES ,
111] VALVE .f
! 2-CAC-CV-2715 CAD LOOP A/ LOOP B SOLID 3/4 150 GODDARD AOV J255 . GODDARD OPEN YES YES ,
1111 CROSS-TIE VALVE . ,
- t 2-CAC-CV-2716 CAD LOOP A/ LOOP B SOUD 3/4 150 GODDARD AOV' J255 GODDARD OPEN'. . YES - YES -
till CROSS-TIE VALVE 2-CAC-CV-2889 MSTRUMENT AIR BACKUP SOLID 3/4 150 GODDARD AOV .J255' GODDARD OPEN YES ~ YES {
(11] FROM CAD SYSTEM ISV i 2-CAC-CV-2890 INSTRUMENT AtR BACKUP SOLID 3/4 150- GODDARD AOV J255 GODDARD OPEN YES YES !
(11] FROM CAD SYSTEM ISV 2-CAC-CV-2981 AOG PURGE HX INLET VALVE SOUD 3/4 150 GODDARD AOV NA ' GODDARD NON- ~ YES- NO 1111 SAFETY i
4 2-CAC-V22 OUTBOARD SUPPRESSION SOUD 2 600 VELAN MOV SMB-OOO LIMITORQUE CLOSE YES NO ,
11 21 POOL 2-INCH PURGE EXHAUST 1 VALVE 2-CAC-V23 OUTBOARD DRYWELL 2-WCH SOUD 2 600 VELAN MOV SMB-OOO LIMITOROUE CLOSE YES NO (1 21 PURGE EXHAUST VALVE -;
- [11] These valves are specially designed for cryogenic service. They have soft seats and are not expected to become thermally bound. l
[12] These valves are not considered to be within the scope of GL 95-07. However, they were reviewed for PLTB based on their inclusion . [
in EOPs. They are potentially susceptible to thermal binding if they are operated at conditions beyond their design bases. t t
E2-7
~ - - . . . . - _ , _ . _ ~n~ . . - - - - . _ - - . . _ _ _ - - _ - = _ . - _ _ . _ _ . - . -
- - - ---__,__.___._<_g__-w. -
m __ v,-mm.w.m m. mu-.,m -ew-- v- + -,- -,.m.- n wme s -n.c,
4 GL 95-07 APPLICABILITY SCREEN VALVE TAG VALVE FUNCTION VALVE DESCRIPTION - ACTUATOR DESCRIPTION GL 95-07 APPUCABIUTY .-
DISC S ZE CLASS VENDOR TYPE SIZE VENDOR DESIGN NORMALLY OR GL 95-07
-TYPE BASIS OCCASIONALLY - APPLICABLE 7 SAFETY CLOSED? ,
FUNCTION 2-E11-FOO7A RHR MINIMUM FLOW BYPASS FLEX 4 300 ANCHOR- MOV SMB-000 UMITORQUE OPEN/ YES YES VALVE DARUNG CLOSE 2-E11-F0078 RHR MINIMUM FLOW BYPASS FLEX 4 300 ANCHOR- MOV SMB-000 UMITOROUE OPEN/ .YES YES VALVE DARUNG CLOSE 5 2-E11-FOO8 SHUTDOWN COOLNG OUTBOARD FLEX 20 600 ANCHOR- MOV SB-3 LIMITOROUE CLOSE YES NO r SUCTION ISOLATION VALVE DARUNG 2-E11-FOO9 SHUTDOWN COOUNG NBOARD FLEX 20 600 ANCHOR- MOV S8-2 UMITOROUE CLOSE YES. NO +
SUCTION ISOLATION VALVE DARUNG {
i 2 E11-F011 A RHR HEAT EXCHANGER 2A ORAIN FLEX 4 300 ANCHOR- MOV SMB-000 LIMITOROUE 'CLOSE YES NO i TO SUPPRESSION POOL VALVE DARLING l 4 MOV I 2-E11-F0118 RHR HEAT EXCHANGER 28 DRAN FLEX 300 ANCHOR- SM8-000 UMITORQUE CLOSE YES NO TO SUPPRESSION POOL VALVE DARUNG !
2 E11-F015A LPCIINBOARD NJECTION VALVE FLEX 24 900 ANCHOR- MOV SB-4 LIMITOROUE OPEN YES YES I 113l DARLING ,
2 E11-F0158 LPCI NBOARD NJECTION VALVE FLEX. 24 900 ANCHOR- MOV SM UMITORQUE OPEN YES. YES l 11 31 DARLING 2-E11-F028A SUPPRES$10N POOL DISCHARGE FLEX 16 300 ANCHOR- MOV SMB-1 ' UMITORQUE OPEN/ YES YES ISOLATION VALVE DARLNG CLOSE ;
2-E11-F0288 SUPPRESSION POOL DISCHARGE FLEX 16 300 ANCHOR- MOV SMB-1 UMITOROUE OPEN/ YES. YES ISOLATION VALVE -.DARUNG CLOSE 2-E11-F040 RHR TO RADWASTE OUTBOARD FLEX 4 300 ANCHOR- MOV SM8-000 UMITOROUE CLOSE YES NO i
' SOLATION VALVE DARLNG !
2-E11-F047A he.r1 HEAT EXCHANGER 2A NLET FLEX 16 300 ANCHOR- MOV SM81 UMITOROUE REMAN YES NO 11 41 VALVE DARLING OPEN i 2-E11-F0478 RHR HEAT EXCHANGER 28 NLET FLEX 16 300 ANCHOR- MOV SMB-1. LIMITOROUE REMAN YES NO [
11 41 VALVE DARUNG OPEN i
[13] The high-pressure discs in these valves were drilled as a result of a prior pressure locking review.
[14] These valves are not within the scope of GL 95-07, but were evaluated at the discretion of the PLTB review group. ,
s E2-8 ~
GL 95-07 APPLICABILITY SCREEN .
-VALVE TAG VALVE FUNCTION VALVE DESCRIPTION ACTUATOR DESCRIPTION GL 95-07 APPLICABILITY ,
DISC . ' SIZE CLASS VENDOR TYPE . SIZE . VENDOR DESIGN NORMALLY OR GL 95-07 TYPE BASIS OCCASIONALLY APPLICABLE 7 SAFETY CLOSED?, ,
FUNCTION 2-E21-FOO4A CORE SPRAY OUTBOARD FLEX 10 600 ANCHOR- MOV SB-1 LIMITGRQUE OPEN YES- YES INJECTION VALVE DARLING 2-E21-F0048 CORE SPRAY OUTBOARD FLEX 10 600 ANCHOR- MOV SB-1 LIMITORQUE OPEN YES YES.
INJECTION VALVE DARLING 2-E21-FOO5A CORE SPRAY INBOARD FLEX 10 600 ANCHOR- MOV SB-1 LIMITORQUE OFEN YES .YES
[151 INJECTION VALVE DARLING 2-E21-F005B CORE SPRAY INBOARD FLEX 10 600 ANCHOR- MOV SB-1 LIMITOROUE OPEN YES YES 1151 INJECTION VALVE DARLING 2 E21-F031 A CORE SPRAY MINtMUM FLOW FLEX 3 300 ANCHOR- MOV SMB-000 LIMITORQUE OPEN/ YES YES BYPASS VALVE DARLING CLOSE 2-E21-F0318 CORE SPRAY MINIMUM FLOW FLEX 3 300 ANCHOR- MOV SMB-000 LIMITOROUE OPENI YES YES BYPASS VALVE DARLING CLOSE 2-E41-FOO1 HPCI TURBINE STEAM SUPPLY DOUBLE 10 600 ANCHOR- MOV SB-1 LIMITOROUE OPEN YES YES 1161 VALVE DARLING 2-E41-FOO2 STEAM SUPPLY INBOARD DOUBLE 10 600 ANCHOR- MOV SMB-1 LIMITORQUE CLOSE YES NO 11 61 ISOLATION VALVE DARLING 2-E41-FOO3 STEAM SUPPLY OUTBOARD DOUBLE 10 600 ANCHOR- MOV SMB-1 LIMITORQUE - 'CLOSE YES NO 11 61 ISOLATION VALVE DARLING t 2-E41-F004 CONDENSATE STORAGE TANK FLEX 16 150 ANCHOR- MOV SMB-OO LIMITOROUE CLOSE YES NO SUCTION VALVE DARLING 2-E41-FOO6 HPCI INJECTION VALVE DOUBLE 14 900 ANCHOR- MOV SB-2 LIMITOROUE OPEN YES YES 11 61 DARLING 2-E41-F011 REDUNDANT ISOLAft3 4 TO FLEX 10 900 ANCHOR- MOV SMB-1 LIMITOROUE CLOSE YES NO CONDENSATE STO'(AGE 14'K DARLING VALVE
, [15] The high-pressure discs in these valves were drilled as a result of a prior pressure locking review.
[16] These were originally flex-wedge gate valves. They were replaced with double-disc gate valves as a result of a prior themal binding review. Also, holes were drilled in the high-pressure discs of the HPCI Turbine Steam Admission Valve and the HPCI Injection Valve as a result of a prior pressure locking review.
i E2-9
. GL 95-07 APPLICABILITY SCREEN .
VALVE TAG VALVE FUNCTION VALVE DESCRIPTION ACTUATOR DESCRIPTION GL 95-07 APPUCABlWTY -(
. DISC SIZE CLASS VENDOR TYPE SIZE VENDOR DESKIN - NORMALLY OR GL 95-07 TYPE BASIS OCCASIONALLY APPUCABLE?
SAFETY - CLOSED 7 ,
FUNCTION 2-E41-F025 HPCI COND PUMP DISCH OUTBOARD SOUD 1 600 VELAN AOV- 37RN122 K-M CLOSE -YES NO ISOL VALVE TO CRW SP236 2IE41-F026 ' HPCI COND PUMP DISCH INBOARD SOLID 1 600 VELAN AOV 37RN122 K-M CLOSE YES. NO_
ISOL VALVE TO CRW SP236 2-E41-F041 SUPPRESSION POOL SUCTION VALVE FLEX 16 150 ANCHOR- MOV SMB-OO UMITORQUE OPEN- YES .YES DARLING 2-E41-F042 - SUPPRESSION POOL SUCTION VALVE FLEX 16 150 ANCHOR- MOV SMEOO UMITOROUE OPEN YES YES
-DARUNG 2-E41-F075 TURBINE EXHAUST VACUUM SOLID 2 600 VELAN MOV SMB-000 LIMITOROUE CLOSE- YES NO BREAKER VALVE 2-E41-F079 TURBINE EXHAUST VACUUM SOUD 2 600 VELAN MOV SMB-000 UMITOROUE - CLOSE YES NO BREAKER VALVE 2-E51-FOO4 RCIC COND PUMP DISCH INBOARD SOUD 1 600 VELAN AOV 37RN122 K-M . CLOSE YES NO ISOL VALVE TO CRW SP236 2-E51-FOO5 . RCIC COND PUMP DISCH OUTBOARD SOUD 1 600 VELAN AOV 37RN122 K-M CLOSE YES NO ISOL VALVE TO CRW SP236 2-E51-FOO7 STEAM SUPPLY INBOARD ISOLATION DOUBLE 3 900 ANCHOR- MOV SMB-OO UMITOROUE CLOSE YES NO VALVE DARUNG 2-E51-FOO8 STEAM SUPPLY OUTBOARD DOUBLE 3 900 ANCHOR- MOV SMB-OO LIMITORQUE CLOSE YES- NO ISOLATION VALVE DARUNG 2 E51-F010 CONDENSATE STORAGE TANK FLEX, 6 150 ANCHOR- MOV SMB-OO UMITOROUE OPEN/ YES YES SUCTION VALVE DARUNG CLOSE E2-10 1
- _ _ ._- _ _ _ _ _ - - - - --_ _ - _ _ _ = _ _ - - _ _ _ _ - _ _ - _ _ _ _ _ _ _ _ - _ - _ _ _ - - _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ - - _ _ _ _ - _ _ _ _ _ _ - _ - _ _ . - _ _ - - -
GL 95-07 APPLICABILITY SCREEN l VALVE TAG VALVE FUNCTION VALVE DESCRIPTION ACTUATOR DESCRIPTION GL 95-07 APPUCAINUTY : ,-
DISC SIZE CLASS VENDOR TYPE SIZE VENDOR DESIGN NORMALLY OR GL 95-07 TYPE BASIS OCCASIONALLY - APPUCABLE7 '
SAFETY ^ CLOSED? ,
FUNCTION 2-E51-F013 RCIC INJECTION VALVE DOUBLE 4 900 ANCHOR- MOV SMB-OO LIMITOROUE OPEN/ YES YES 117L [181 DARUNG' CLOSE 2 E51-F029 SUPPRESSION POOL SUCTION ' FLEX 6 150 ANCHOR- MOV SMSOO UMITOROUE OPEN YES YES 11 81 VALVE DARUNG 2-E51-F031 SUPPRESSION POOL SUCTION FLEX 6 150 ANCHOR- MOV SMB-OO UMITORQUE OPEN YES YES 11 81 VALVE DARUNG 2-E51-F062 TURBME EXHAUST VACUUM SOUD 2 600 VELAN MOV SMB-000 LIMITOROUE CLOSE YES .NO BREAKER VALVE 2-E51-F066 TURBtNE EXHAUST VACUUM SOUD 2 600 VELAN MOV SMB 000 UMITORQUE CLOSE YES NO BREAKER VALVE 2-G16-FOO3 DRYWELL FLOOR DRAIN INBOARD FLEX 3 150 ANCHOR AOV A61B MILLER CLOSE YES NO ISOLATION VALVE 4
2-G16 FOO4 DRYWELL FLOOR DRAIN OUTBOARD FLEX 3 150 ANCHOR AOV A61B MILLER CLOSE YES NO ISOLATION VALVE I
2-G16-F019 DRYWELL EQUIPMENT DRAIN FLEX 3 150 ANCHOR AOV A61B MILLER CLOSE YES NO INBOARD ISOLATION VALVE 2-G16-F020 DRYWELL EQUIPMENT DRAIN FLEX 3 150 ANCHOR AOV A61B MtLLER 'CLOSE YES NO OUTBOARD ISOLATION VALVE
[17] This was originally a flex-wedge gate valve. It was replaced with double-disc gate valve as a result of a prior thermal binding review.
Also, a hole was drilled in the high-pressure disc as a result of a prior pressure locking review.
[18] RCIC is not a safety-related system. However, it has PRA significance, so these valves were included in the scope of the.GL 95-07 review.
E2-11 l
GL.95-07 APPLICABILITY SCREEN ,
VALVE TAG VALVE FUNCTION VALVE DESCRIPTION ACTUATOR DESCRIPTION GL 95-07 APPUCABluTY .
DISC SIZE CLASS VENDOR TYPE SIZE - VENDOR DESIGN NORMALLY OR - GL 95-07 TYPE BASIS ' OCCASIONALLY . APPUCABLE7 SAFETY CLOSED 7 - ,
FUNCTION t 2-G31-F001 RWCU NLET INBOARD ISOLATION DOUBLE .6 900' ' ANCHOR- MOV. SMIM)O UMITORQUE ~CLOSE YES NO l19l VALVE DARUNG 2-G31-FOO4 RWCU INLET OUTBOARD ISOLATION DOUBLE 6 900 ANCHOR- MOV SMB-OO UMITOROUE CLOSE YES NO (19] VALVE DARLING -
2-RCC-V120 RBCCW NLET VALVE TO RWCU SOUD 1 600 VELAN AOV 37RN122 K-M NON- NO NO-SP236 SAFETY *
(201 PRECOAT PUMP 2-RCC-V54 DRYWELL EOUtPMENT DRAN HX SOUD 2 600 VELAN AOV 60RN155 K-M NON- NO NO i (201 RBCCW INLET VALVE SP174 SAFETY j 2-RCC-V73 CRD PUMP 1B COOLNG WATER SOLID 1 600 VELAN AOV 37RN122 K-M NON- NO NO 1201 INLET VALVE SP236 - SAFETY 2-RCC-V74 CRD PUMP 1 A COOUNG WATER SOLID 1 600- VELAN AOV- 37RN122 K-M NON- NO NO 120] INLET VALVE SP236 SAFETY 2-RCC-V76 REACTOR BUILDMG EQUIPMENT SOLID 2 600 VELAN AOV 60RN155 K-M NON- NO NO 120] DRAN HX INLET VALVE SP174 SAFETY
[19] These valves have no safety function to open. However, the original flex-wedge gate valves were replaced with double-disc gate valves during a prior PLTB review. Additionally, holes were drilled in the high-pressure discs. ,
[20] These valves have no safety function to open. However, PLTB evaluations were performed at the discretion of the PLTB review group.
t 4
_ j-E2-12 .
l
._ _ _ . _ . _ _ _ _ . _ . _ _ _ . _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . - _ _ . ~. . _ _. . . . , . ~.
ENCLOSURE 3 BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 ..
NRC DOCKET NOS. 50-325 & 50-324 -
OPERATING LICENSE NOS. DPR-71 & DPR-62 RESPONSE TO THE NRC GENERIC LETTER 95-07, " PRESSURE LOCKING AND THERMAL BINDING OF SAFETY-RELATED POWER-OPERATED GATE VALVES "
GL 95-07 SUSCEPTIBILITY SCREEN PRESSURE LOCKING SCREEN THERMAL BINDING SCREEN VALVE TAG SUSCEPTIBLE SUSCEPTIBLE DISPOSITION SCHEDULE TO PRESSURE TO THERMAL FOR SUSCEPTIBLE TO SUSCEPTIBLE PROVIDED MAXIMUM MAXIMUM PROCEDURAL LOCKING 7 BINDING 7 LONG-TERM HYDRAULICALLY TO THERMALLY WITH PL OPERATING dT >50*F CONTROLS DISPOSITION INDUCED INDUCED MITIGATING TEMP FOR TO MITIGATE DOUBLE DISC DOUBLE DISC FEATURE 7 > 200*F7 SOLID OR TB7 DRAG FORCES? DRAG FORCES 7 > 100*F FOR FLEX 7 1-E11-F007A NO NO NO YES YES NO NO NO NA NA 1-E11-FOO7B [1] [1] [2] [1) 2-E11-F007A 2-E11-F0078 1-E11 FOO8 YES NO NO YES YES NO YES YES 131 NA 1-E11-F009 121 121 2-E11-F008 2-E11-FOO9 1-E11-F015A NO NO YES YES YES NO NO YES SHORT-TERM:. EVALUATION DETERMINED THAT THESE VALVES 1-E11-F0158 141 121 ARE OPERABLE 8/96 2-E11-F015A LONG-TERM: ESTABLISH 2-E11-F015B 1] 1/2-Ell-F011A/B are identical valves. They are periodically closed at temperatures which are greater than the maximum expected accident temperatures for 1/2-E11-F007A/B. Thennal binding has not been observed at bounding conditions.
[2] The present Operating Procedures contain precautions about PLTB conditions.
[3] Evaluated for commercial considerations but.not within the scope of GL 95-07.
[4] Holes have been drilled in the high-pressure discs as a result of a prior pressure locking review.
E3-1
__ _ _ __ _- .. - - _ _ _ _ _ _ _ _ _ - - - _ _ _ - _ _ - _ _ _ _ - - - _ _ - _ - _ _ _ _ _ - - _ _ _ _ _ _ _ _ _ - _ =
GL 95-07 SUSCEPTIBILITY SCREEN :
PRESSURE LOCKING SCREEN THERMAL BINDING SCREEN UALUE TAG SUSCEPTIBLE SUSCEPTIBLE DISPOSITION SCHEDULE TO PRESSURE TO THERMAL FOR SUSCEPTIBLE TO SUSCEPTIBLE PROVIDED MAXIMUM MAXIMUM dT PROCEDURAL LOCKING? ' BINDING? LONG-TERM HYDRAULICALLY -TO WITH PL OPERATING >50*F FOR CONTROLS DISPOSITION
-lNDUCED THERMALLY MITIGATING TEMP SOLID OR TO MITIGATE DOUBLE DISC INDUCED FEATURE? > 200*F? >100*F FOR TB7 DRAG FORCES? DOUBLE DISC FLEX?
DRAG FORCES?
1-E11-F028A YES NO NO NO NO NO YES NO SHORT TERM: EVALUATION DETERMINED THAT THE 8/96 1-E11-F0288 151 VALVES ARE OPERABLE 2-E11-F028A LONG-TERM: ESTABLISH PROCEDURAL CONTROLS 2-E11-F0288 1-E11-F047A NO NO NO YES NO NO NO NO NA 1-E11-F0478 161 151 [6] 16) 171 2-E11-F047A 2-E11-FO478
[5] The present Operating Procedures contain precautions about PLTB conditions.
[6] A potential susceptibility to thermally-induced pressure locking was identified in the initial screening review. However, the RHR System and valves are warmed up prior to closure of 1/2-E11-F047A/B, so pressure locking is not expected.
[7] GL 95-07 is not applicable to these valves. They were evaluated for PLTB at the discretion of the PLTB review group. ,.
i E3-2
GL 95-07 SUSCEPTIBILITY SCREEN .
PRESSURE LOCK!NG SCREEN THERMAL BtNDING SCREEN -
VALVE TAG SUSCEPTIBLE SUSCEPTIBLE OtSPOSITION SCHEDULE TO PRESSURE TO THERMAL FOR SUSCEPTIBLE TO SUSCEPTIBLE PROVIDED MAXIMUM MAXIMUM dT PROCEDURAL LOCKING ? BINDING? LONG-TERM HYDRAUUCALLY TO WITH PL OPERATING > 50*F FOR CONTROLS OtSPOSITIOA-INDUCED THERMALLY MITIGATING TEMPERATURE SOLID OR TO MITIGATE DOUBLE DtSC INDUCED FEATURE 7 > 200*F? >100*F FOR TB7 DRAG FORCES? DOUBLE DISC FLEX?
DRAG FORCES?
1-E 21-F004A NO NO NO NO NO NO NO NO NA NA 1-E21-F0048 18i 2-E21-FOO4A 2-E21-F0048 1-E21-FOO5A NO NO YES NO NO NO NO NO NA NA 1-E21-FOO58 191 2-E21-F005A 2-E21-F005B 1-E21-F031 A NO NO NO YES NO NO NO NO NA NA 1-E21-F031 B 11 01 2-E21-F031 A 2-E21-F0318
[8] These valves are closed approximately 1 minute every 92 days. The circumstances which could lead to hydraulically induced pressure locking are considered to be not credible.
[9] IIoles were drilled in the high-pressure discs of these valves as a result of a prior pressure locking review.
[10] These are the Core Spray Minimum Flow Valves. They have a maximum possible closing temperature of 203"F during a LOCA. Ilowever, it is anticipated that the area temperature will be great enough so that the expected temperature change will be < 100"F.
E3-3
~.. ,
GL 95-07 SUSCEPTIBILITY-SCREEN -
PRESSURE LOCKNG SCREEN THERMAL BINDNG SCREEN UALVE TAG SUSCEPTIBLE SUSCEPT18LE DISPOS! TION SCHEDULE TO PRESSURE TO THERMAL FOR SUSCEPTl8LE TO SUSCEPTISLE PROVIDED MAXIMUM MAXIMUM dT PROCEDURAL LOCKING? BINDNG? LONG-TERM .
HYDRAULICALLY TO ' WITH PL OPERATNG >50*F FOR CONTROLS- MSPOSITd-INDUCED THERMALLY MITIGATING TEMP > SOLtO OR TO MITIGATE DOUBLE DISC NDUCED FEATURE? 200*F? >100*F FOR T87 DRAG FORCES? DOUBLE DISC FLEX?
DRAG FORCES?
1-E41-F001 NO NO YES NA NA NA' NO NO NA 'NA 3 2 E41-F001 1111 1-E41-F006 NO NO YES NA NA NA NO NO NA NA 2-E41-FOO6 till 1-E41-FO41 NO NO NO NO NO NO NO NO NA NA .
2-E41-F041 ,
L NO YES NO NO NO NO YES NO SHORT TERM: EVALUATION '('
1-E41-F042 DETERMtNED THAT THESE VALVES 4/26/96 ARE OPERABLE LONG TERM: PERFORM DETAtLED ANALYSIS, EVALUATNG THE NEED r 2-E41-F042 FOR MODIFICATION l i
[11] These were originally flex-wedge gate valves. They were replaced with double-disc gate valves with holes drilled in their discs as a result of a prior review. ;
i i
I h
i a
E3-4 ,
__ u._ ._ _ _ _ _ _ . _ _ m.._ _ _ _ _ _ _ . _ . _ _ _ _ . _ _ _ _ _ -__. . . . - - - . - - --
= r
a t i .
- GL 95-07 SUSCEPTIBILITY SCREEN l
I ..
PRESSURE LOCKING SCREEN THERMAL BINDING SCREEN ' -*s i VCAVE TAG SUSCEPTIBLE SUSCEPT1BLE - DISPOSITION SCHEDULE !
TO PRESSURE TO THERMAL FOR l
SUSCEPTIBLE TO SUSCEPTIBLE PROVIDED - MAXIMUM MAXIMUM dT PROCEDURAL LOCKING? BINDING? LONG-TERM HYDRAUUCALLY TO WITH PL OPERATING >50*F FOR CONTROLS DISPOSIM-INDUCED THERMALLY MITIGATING TEMP SOLID OR TO MITIGATE DOUBLE DISC INDUCED FEATURE? > 200*F7 >100'F FOR TBF DRAG FORCES? DOUBLE DISC FLEX?
DRAG i FORCES?
1-E51-F010 NO NO NO NO ' NO NO NO NO NA NA 2-E 51-F010 1-E51-F013 NO NO YES NA NA NA: NO NO NA NA 2-E51-F013 11 21 1121 1-E51-F029 NO NO NO NO NO NO NO NO NA NA 1-E51-F031 2-E51-F029 2-E51-F031 r
1-G31-FOO1 NO NO YES NA NA NA - NO NO NA
'I 1-G31-F004 (1 21 1121 11 31 2-G31-FOO1 .
2-G31-FOO4 e
[12] These were originally flex-wedge gate valves. They were replaced.with double-disc gate valves with holes drilled in their discs as a result of a prior PLTB review. .
[13] These valves are not strictly within the scope of GL 95-07. However, during a prior PLTB review, the original flex-wedge gate valves were replaced with double-disc gate valves and holes were drilled in the discs. l t
h 4
E3-5
_ - . . _ - - . _... .__.._.-_._.-_..-___.m . _ _ _ _ _ __._____ _ _ _.-- _ _ _ _ _ _ , - , - . , - , - , . -. ,
' GL 95-07 SUSCEPTIBILITY SCREEN -
PRESSURE LOCKING SCREEN THERMAL 81ND4NG SCREEN . .
t?ALVE TAG SUSCEPTIBLE - SUSCEPTIBLE DISPOSITION ' SCHEDULE TO PRESSURE TO THERMAL FOR SUSGPTIBLE TO SUSGPTIBLE PROVIDED MAXIMUM MAXIMUM ' PROGDURAL LOCKING? BINDING? . LONG-TERM HYDRAULICALLY TO .
WITH PL OPERATING dT >50*F CONTROLS ogsposgygon-INDUGD THERMALLY MITIGATING TEMPERAT FOR SOUD TO MITIGATE DOUBLE DISC INDUGD FEATURE? URE > OR >100'F TB7 DRAG FORGS? DOUBLE DISC 2OO'F? FOR FLEX?
DRAG FORGS?
1-RCC-V120 NA NA NA NO NO NO NO NO. NA NA 1-RCC-V54 [14l 1141 -
1 RCC-V73 1-RCC-V74 1-RCC-V76 2-RCC-V120 2-RCC-V54 2 RCC-V73 2-RCC-V74 2-RCC-V76
[14] These valves are not safety-related and are not within the scope of GL 954)7. They were evaluated at the discretion of the PLTB review group because their proper operation ensures adequate cooling (hence long-term reliability) for equipment serviced by RBCCW. They were determined to not be susceptible to PLTB.
E3-6
.4 GL 95-07 SUSCEPTIBILITY SCREEN PRESSURE LOCKING SCREEN THERMAL BINDING SCREEN .
tfALVE TAG SUSCEPTIBLE SUSCEPTIBLE DISPOSITION SCHEDULE TO PRESSURE TO THERMAL FOR SUSCEPTIBLE TO SUSCEPTIBLE PROVIDED MAXIMUM MAXIMUM dT PROCEDURAL LOCKING? BINDING? LONG-TERM, HYDRAULICALLY TO WITH PL OPERATING > 50*F FOR CONTROLS OlSPOSITION INDUCED THERMALLY MITIGATING TEMP SOLID OR TO MITIGATE DOUBLE DISC INDUCED FEATURE 7 > 200*F? > 100*F FOR - TB7 DRAG FORCES 7 DOUBLE DISC FLEX 7 DRAG FORCES 7 1
2-CCC-CV-2 713 NA NA NA NO YES NO NO NO NA NA 2 CCC-CV-2714 11 51 11 5) 11 51 1151 2-CAC-CV-2715 2-CGC-CV-2716 2-CAC-CV-2889 2-CAC-CV-2890 2-CAC-V22 NA NA NA NO NO NO NO NO [1 61 NA 2-CAC-V23
[15] These valves have solid wedges, but are equipped with soft seats. They have been specifically designed to operate in a cryogenic system, where significant temperature changes are expected to occur.
[16] These valves are not strictly within the scope of GL 95-07. However, they have been reviewed for PLTB based on their inclusion in EOPs.
They are potentially susceptible to PLTB if they are operated at temperatures beyond their design basis.
L E3-7
ENCLOSURE 4 BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 NRC DOCKET NOS. 50-325 & 50-324 OPERATING LICENSE NOS. DPR-71 & DPR-62 -
RESPONSE TO TIIE NRC GENERIC Llil IEK 95-07, " PRESSURE LOCKING AND THERMAL BINDING OF SAFETY-RELATED POWER-OPERATED GATE VALVES "
SUMMARY
SCIIEDULE OF PROPOSED CORRECTIVE ACTIONS PROPOSED PROPOSED WALVE FUNCTION SUSCEPTIBILITY CORRECTIVE COMPLETION ACTION DATE 1-E11-F015A RHR LPCI INJECTION VALVES THERMAL BINDING MAY OCCUR PROCEDURAL CONTROLS / PRECAUTIONS 8/15/96 1-E11-F015B IF A VALVE IS CLOSED AT AN ELEVATED TEMPERATURE 2-E11-F015A 2-E11-F0158 1 E11-F028A RHR SUPPRESSION POOL PRESSURE LOCKING MAY PROCEDURAL CONTROLS / PRECAUTIONS B/15/96 1-E11-F028B DISCHARGE ISOLATION OCCUR IF RHR PUMP VALVES DISCHARGE PRESSURE 2-E11-F028A BECOMES TRAPPED IN THE 2-E11-F0288 BONNET REGION 1-E41-FO42 HPCI SUPPRESSION POOL PRESSURE LOCKING MAY ANALYZE THERMAL ENVIRONMENT FOR IMPACT ON EXISTING 4/26/96 2-E41-F042 SUCTION VALVES OCCUR IF A VALVE BONNET IS VALVE CONFIGURATION HEATED AND THE WATER IN THE BONNET REGION CANNOT LEAK OUT E4-1
, ENCLOSURES
- BRUNSWICK STEAM ELECTRIC PLANT, UNITS'1 AND 2 ~ -
NRC DOCKET NOS. 50-325 & 50-324 OPERATING LICENSE NOS. DPR-71 & DPR-62 ~ .
RESPONSE TO THE NRC GENERIC LETTER 95-07, " PRESSURE LOCKING AND THERMAL BINDING OF
. SAFETY-RELATED POWER-OPERATED GATE VALVES "
A number of prior modifications have been performed at BNP to mitigate the effects of PL/TB. This enclosure provides a list'of the significant changes.
VALVE VALVE FUNCTION MODIFICATIONS & REVISIONS 1-821-F016 MAIN STEAM LINE DRAIN Replaced Flex-Wedge Valve with Double-Disc Valve. Added ISOLATION Bonnet Pressure Equalizing Valves.
1-821-F019 MAIN STEAM LINE DRAIN Replaced Flex-Wedge Valve with Double-Disc Valve. Added ISOLATION Bonnet Pressure Equalizing Valves.
1 -E11 -FOO4 A RHR PUMP TORUS SUCTION Drilled Hole in Disc, Added Precaution in Operating Procedure 1-E11-FOO4B RHR PUMP TORUS SUCTION Drilled Hole in Disc, Added Precaution in Operating Procedure 1-E11-FOO4C RHR PUMP TORUS SUCTION Drilled Hole in Disc, Added Precaution in Operating Procedure 1-E11-FOO4D RHR PUMP TORUS SUCTION Drilled Hole in Disc, Added Precaution in Operating Procedure 1 -E11 -F015 A RHR LPCI INJECTION Drilled Hole in High-Pressure Disc 1-E11-FO15B RHR LPCI INJECTION Drilled Hole in High-Pressure Disc.
1-E21-FOOSA CORE SPRAY INJECTION Drilled Hole in High-Pressure Disc
- 1-E21-FOOSB CORE SPRAY INJECTION Drilled Hole in High-Pressure Disc t
i E5-1
~.
VALVE VALVE FUNCTION MODIFICATIONS & REVISIONS 1-E41 -F001 HPCI TURBINE STEAM ADMISSION Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled Hole in High Pressure Disc, Installed a Ball-Screw Actuator 1 -E41 -FOO2 HPCI INBOARD STEAM ISOLATION Replaced Flex-Wedge Valve with Double-Disc Valve. Added VALVE Bonnet Pressure Equalizing Valves.
1-E41-FOO3 HPCI OUTBOARD STEAM Replaced Flex-Wedge Valve with Double-Disc Valve. Added ISOLATION VALVE Bennet Pressure Equalizing Valves.
1 -E41 -F006 HPCI INJECTION VALVE Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled Hole in Feedwater-Side Disc, Installed Ball-Screw Actuator 1 -E51 -FOO7 RCIC INBOARD STEAM ISOLATION Replaced Flex-Wedge Valve with Double-Disc Valve. Added Bonnet Pressure Equalizing Valves.
1 -E51 -F008 RCIC OUTBOARD STEAM Replaced Flex-Wedge Valve with Double-Disc Valve. Added ISOLATION Bonnet Pressure Equalizing Valves.
1-E51-F013 RCIC INJECTION VALVE Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled Hcle in Feedwater Side Disc 1-G31-F001 RWCU INBOARD SUCTION Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled ISOLATION Hole in Reactor Side Disc 1 -G31 -F004 RWCU OUTBOARD SUCTION Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled ISOLATION Hole in Reactor Side Disc E5-2
l l
VALVE VALVE FUNCTION MODIFICATIONS & REVISIONS
- 2-B21-F016 MAIN STEAM LINE DRAIN Replaced Flex-Wedge Valve with Double-Disc Valve. Added ISOLATION Bonnet Pressure Equalizing Valves.
2-821-F019 MAIN STEAM LINE DRAIN Replaced Flex-Wedge Valve with Double-Disc Valve. Added ISOLATION Bonnet Pressure Equalizing Valves.
2-E11-F004A RHR PUMP SHUTDOWN COOLING Drilled Hole in Disc, Added Precaution in Operating Procedure SUCTION 2-E11-F004B RHR PUMP SHUTDOWN COOLING Drilled Hole in Disc, Added Precaution in Operating Procedure SUCTION 2-E11-FOO4C RHR PUMP SHUTDOWN COOLING Drilled Hole in Disc, Added Precaution in Operating Procedure SUCTION 2-E11-FOO4D RHR PUMP SHUTDOWN COOLING Drilled Hole in Disc, Added Precaution in Operating Procedure SUCTION 2-E11-F015 A RHR LPCI INJECTION Drilled Hole in High-Pressure Disc 2-E11-F015B RHR LPCI INJECTION Drilled Hole in High-Pressure Disc 2-E21-F005 A CORE SPRAY INJECTION Drilled Hole in High-Pressure Disc 2-E21-F005B Drilled Hole in High-Pressure Disc CORE SPRAY INJL}CTION ES-3
~.
VALVE VALVE FUNCTION MODIFICATIONS & REVISIONS .,
2-E41-FOO1 HPCI TURBINE STEAM ADMISSION Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled Hole in High Pressure Disc, installed a Ball-Screw Actuator' 2-E41 -FOO2 HPCI INBOARD STEAM ISOLATION Replaced Flex-Wedge Valve with Double-Disc Valve... Added VALVE Bonnet Pressure Equalizing Valves.
2-E41-FOO3 HPCI OUTBOARD STEAM Replaced Flex-Wedge Valve with Double-Disc Valve. Added ISOLATION VALVE Bonnet Pressure Equalizing Valves.
2-E41 -FOO6 HPCI INJECTION VALVE Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled Hole in Feedwater-Side Disc, installed Ball-Screw Actuator i 2-E51-FOO7 RCIC INBOARD STEAM ISOLATION Replaced Flex-Wedge Valve with Double-Disc Valve. Added Bonnet Pressure Equalizing Valves.
2-E51-FOO8 RCIC OUTBOARD STEAM Replaced Flex-Wedge Valve with Double-Disc Valve. Added
. ISOLATION Bonnet Pressure Equalizing Valves.
2-E51-F013 RCIC INJECTION VALVE Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled Hole in Feedwater Side Disc 2-G31 -FOO1 RWCU INBOARD SUCTION Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled ISOLATION Hole in Reactor Side Disc 2-G31 -FOO4 RWCU OUTBOARD SUCTION Replaced Flex-Wedge Valve with Double-Disc Valve, Drilled ISOLATION Hole in Reactor Side Disc E5-4
ENCLOSURE 6 BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 NRC DOCKET NOS. 50-325 & 50-324 OPERATING LICENSE NOS. DPR-71 & DPR-62 RESPONSE TO THE NRC GENERIC LETTER 95-07, " PRESSURE LOCKING AND THERMAL BINDING OF SAFETY-RELATED POWER-OPERATED GATE VALVES "
LIST OF REGULATORY COMMITMENTS The following table identifies those actions committed to by Carolina Power & Light Company in this document. Any other actions discussed in the submittal represent intended or planned actions by Carolina Power & Light Company. They are described to '
the NRC for the NRC's information and are not regulatory commitments. Please notify the Manager-Regulatory Affairs at the Brunswick Nuclear Plant of any questions regarding this document or any associated regulatory commitments.
1 I
l Committed Commitment date or i outage
- 1. Procedural controls are being established for the potential thermal 8/15/96 binding of the RHR LPCI Injection valves.
- 2. Procedural controls are being established for the potential 8/15/96 pressure locking of the RHR Suppression Pool Discharge Isolation valves.
- 3. Analyze the thermal environment for impact on the existing HPCI 4/26/96 Inboard Suppression pool suction valve configuration.
E6-1
_.