ML20095F328

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Forwards Addl Info Re 951120 Proposed Amend to OL Re Drywell Leak Rate Testing Requirements
ML20095F328
Person / Time
Site: Grand Gulf Entergy icon.png
Issue date: 12/15/1995
From: Meisner M
ENTERGY OPERATIONS, INC.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GNRO-95-0138, GNRO-95-138, NUDOCS 9512180381
Download: ML20095F328 (7)
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OsENTERGY c Ef0%"""" '"*'

Ptyt Gbson, MS 39150

. Tel 601437 6470 M J. Meisner December 15,1995 can wear sur s rewenwar, U.S. Nuclear Regulatory Commission Mail Station P1-137 Washington, D.C. 20555 ATTENTION: Document Control Desk

SUBJECT:

Grand Gulf Nuclear Station Docket No. 50-416 License No. NPF-29 Drywell Leak Rate Testing Requirements Proposed Amendment to the Operating License

REFERENCE:

GNRO-95/00128 and RBG-42193, Drywell Leak Rate Testing Requirements Proposed Amendment to the Operating License, dated November 20,1995 GNRO-95/0138 Gentlemen:

Entergy Operations, Inc. is submitting by this letter additional information concerning a proposed amendment to the Grand Gulf Nuclear Station (GGNS) Operating License. This letter provides additional information concerning this submittal and a commitment to qualitatively assess drywell leaktightness once per operating cycle as discussed with members of the NRC Staff.

The information in this letter does not affect Entergy Operations's previous conclusion that the proposed amendment involves no significant hazards considerations.

Yo struly,

/ a M / F att ments: 1. Alternate Drywell Leak Rate Testing (1 page)

2. Drywellisolation Valves (4 pages) cc: Mr. J. Tedrow (w/a)

Mr. H. W. Keiser (w/a)

Mr. R. B. McGehee (w/a)

Mr. N. S. Reynolds (w/a)

Mr. H. L. Thomas (w/o) 0 0(

1 n ,, ._

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_ 9512190381 951215

,^ PDR ADOCK 05000416 P PDR

l GNFiO 95/0138 page 2 of 2 cc: (continued)

Mr. P. W. O'Connor, Project Manager ,w/2)

Office of Nuclear Reactor Regulation ,

U.S. Nuclear Regulatory Commission l Mail Stop 13H3 l Washington, D.C. 20555 Dr. Eddie F. Thompson (w/a)

State Health Officer State Board of Health P.O. c3ox 1700 )

Jackson, Mississippi 39205 Mr. L. J. Callan (w/a) l U.S. Nuclear Regulatory Commission l

Region IV Suite 400 611 Ryan Plaza Drive l Arlington, TX 76011 j I

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e GNRo-95/0138 Attachment 1 page 1 or 1 ,

1 Alternate Drywell Leak Rate Testing i

l Following approval of the proposed Technical Specification changes, EOl will qualitatively assess the drywell leaktightness at least once per operating cycle. The first assessment will be performed during Cycle 9 at Grand Gulf Nuclear Station. This assessment will provide reasonable assurance of the ability of the drywell to perform its design basis pressure suppression function, that is, that the drywell is operable.

At GGNS, it is our intent to perform this assessroent by using the purge compressors to t cause a pressure change in the drywell. Although not exact, this will provide assurance that the actual drywell leakage is not far in excess of the drywell purge compressors flow rate.

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GNRO-95/013h Attachment 2 page 1 of 4 Drywell isolation Valves

  • Comments System Valve Number Penetraten Type Penetraton Posibon

. Number size (in. diam.) indcation I LPCI"A" E12-F041A 313(i) Check 14 YES F041A is a PlV leak tested by LCO 3.4.6. Leak detechon LPCI "A" T/C E12-F056A 313(O) Locked Closed (LC) .75 istr. installed F041Ahas Manual posson indicahon.

LPCI *B" E12-F041B 314(1) Check 14 YES F041B is a PlV leak tested by LCO 3.4.6. Leak detechon LPCI *B* E12-F236 314(O) LC Manual 1 istr. Installed. F041B has posibon indcahon.

LPCI *B* T/C E12-F056B 314(O) LC Manual .75 CRO to Recire. Pump A Seals 833-F013A 326(1) check .75 NO CRD system normally pressurized to > 1500 psi.

CRD to Recire. Pump A Seals B33-F017A 326(O) check .75 CRD pump inop. alarms.

Standby Liquid Control (SLCS) C41-F007 328(l) check 1.5 NO SLCS -Drain C41-F218 328(I) LC Manual 1 SLCS C41-F006 328(O) check 1.5 SLCS T/C C41-F026 328(O) LC Manual .75 Cont. Cooling Water P42-F115 329(l) check 8 YES Cont. Cooling Water P42-F114-B 329(O) Remote Manual 8 Cont Coohng Water P42-F116-A 330(l) Remote Manual 8 YES Cont Cooling Water P42-F117-B 330(O) Remote Manual 8 Drywell Chilled Water P72-F125-A 331(1) Automatic 4 YES Drywell Chilled Water P72-F126-B 331(O) Automate 4 Drywell Chilled Water P72-F147 332(l) check 4 YES Drywell Chilled Water P47-124-B 332(O) Automate 4

GNRO-95/013'8 Attachment 2 page 2 of 4 Drywell isolation Valves -

Systein Valve Number Penetration Type Penetration Position Comments Number size (in. diam.) indication -

jcondensate Flush Conn. 833-F204 333(l) LC Manual 4 NO Mensate Flush Conn. B33-F205 333(O) LC Manual 4 Instrument Air P53-F008 335(l) check 2 YES/NO Primary path has position indication. Test connedion instrument Air P53-F007-B 335(O) Automatic 2 path does not.

Instrement Air T/C P53-F493 335(O) LC Manual .75

~RWCU Pump Suction G33-F250-A 337(1) Automatic 6 YES RWCG Pump Suction G33-F251-B 337(O) Automatic 6 Combustible Gas Control E61-F0038-B 338(O) Automatic 10 YES LCO 3.6.5.6 requires dosed CombustiNs Gas Control E61-F002B 338(O) Check 10 LCO 3.6.5.6 requires dosed Combustible Gas Control E61-F003A-A 339(O) Automatic 10 YES LCO 3.6.5.6 requires dosed Corr.bustible Gas Control E61-F002A 339(O) Check 10 LCO 3.6.5.6 requires dosed Eb *tible Gas Convol E61-F005A-A 340(O) Automatic 10 YES LCO 3.6.5.6 requires dosed Combustible Gas Control E61-F005B-B 340(O) Automatic 10 LCO 3.6.5.6 requires dosed Combustible Gas Control E61-F004A 340(O) Check 10 LCO 3.6.5.6 requires dosed Combustible Gas Control E61-F004B 340(O) Check 10 LCO 3.6.5.6 requires dosed Combustible Gas Control E61-F007-(A) 341(O) Automatic 8 YES Combustible Gas Control E61-F020-(B) 341(C' Automatic 8 Upper Containment Pool Drain G41-F265 M2(O) LC Manual 3 NO Containment Leak Rate System NA 343(1)(O) BIind flange 4 N/A

GNRO-95/0188 Attachment 2 page 3 of 4 Drywell isolation Valves .

System Valve Number Penetrabon Type Penetrabon Possbon Comments Number size (in. diam.) indcahon -

Drywell Air Purge Supply M41-F015-(A) 345(1) Automabc 20 YES LCO 3.6.5.3 requres dosed Drywell Air Purge Supply M41-F013-(B) 345(O) Automebc 20 LCO 3.6.5.3 requwes dosed CRD to Recirc. ump B Seals B33-F0138 346(l) check .75 NO CRD system normally pressurized to > 1500 psi CRD to Recirc. B Seals B33-F0178 346(O) check .75 CRD pump inop. alarms Drywell Air Purge Exhaust M41-F0164A) 347(l) Automebc 20 YES LCO 3.6.5.3 requwes closed Drywell Air Purge Exhaust - M41-F017-(B) 347(O) Automebc 20 LCO 3.6.5.3 requwes closed i Equpnent Drains P45-F009-(A) 348(I) Automabc 3 YES Equipment Drains P45-F010-(B) 348(O) Automsbc 3 Floor Drains P45-F003-(A) 349(l) Automabc 3 YES Floor Drains P45-F004-(B) 349(O) Automabc 3

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Serwce Air PS2-F196 363(1) check 2 YES/NO Primary path has posson

, indicabon. Test connechor

Serwce Air PS2-F195-B 363(O) Automabc 2 path does not.
Servxe AirT/C PS2-F476 363(O) LC Manual .75 i

Chemmal Sump Dmcharge P45-F096-A 364(l) Automabc 1.75 YES Chemmal Sump Discharge P45-F097-B 364(O) Automebc 1.75 l RWCU T/C G33-F120 366(l) LC Manual .75 YES RWCU to Heat Exchanger G33-F253-A 366(O) Automabc 6

! Cont. Leak Rate Sys M61-F021 438A(1) LC Manual 1 NO j Cont. Leak Rate Sys. M61-F020 438A(O) LC Manual 1 i

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GNRO-95/0138 Drywell isolation Valves ,

System Valve Number Penetration Type Penetrabon Posden Comments -

Number size (in. diam.) indicaten Reactor Water Sample Line B33-F020-A 465(0) Automate .75 YES Reactor Water Sample Line 833-F019-B 465(0 Automatic .75 Reactor Sa@ TC B33-F021 465(O) LC Manual .75 i

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