ML20127B352

Advises That Containment Sys Branch re-review of Tech Specs to Verify That Info Properly Derived from Analyses & Evaluations Included in FSAR Complete.Recommended Changes Encl.W/O Encl

ML20127B352
Person / Time
Site:	Grand Gulf, 05000000
Issue date:	03/07/1984
From:	Butler W Office of Nuclear Reactor Regulation
To:	Houston R Office of Nuclear Reactor Regulation
Shared Package
ML19263A614	List: AECM-84-0133, Advises NRC of Completion of Operator Recertification Program,Per 831118 Commitment.Deficiencies in Training That Remain Open Will Be Closed in Near Future.One Licensed Reactor Operator Undergoing Remedial Training AECM-84-0204, Special Rept 84-017/0:on 840304,Fire Doors 1A401 & OC219 Blocked Open to Support Maint Activities.Fire Watches Established Until Doors Restored AECM-84-0226, Responds to 840323 Confirmation of Action Ltr Re Verifying Removal of Certain Individuals from Licensed Duties.Util Has Evaluated Licensed Operators to Determine If Deficiency Identified Applicable to Other Operators.Related Info Encl AECM-84-0239, Provides Info Re Plant Discrepancy Repts to Assure That Any safety-related Hardware or Procedural Deficencies Properly Dispositioned,Per 831205 Confirmatory Action Ltr.Procedural Revs Instituted.Related Info Encl ML20126D262 ML20126D273 ML20126D322 ML20126D343 ML20126D352 ML20126D357 ML20126D360 ML20126D363 ML20126D376 ML20126D380 ML20126D392 ML20127A505 ML20127B023 ML20127B328 ML20127B331 ML20127B336 ML20127B341 ML20127B347 ML20127B352 ML20127B358 ML20127B363 ML20127B365 ML20127B370 ML20127B373 ML20127B377 ML20127B381 ML20127B384 ML20127B389 ML20127B408 ML20127B440 ML20127B520 ML20127B524 ML20127B530 ML20127B533 ML20127B542 ML20127B803 ML20127B808 ML20127B888 ML20127B893 ML20127B922 ML20127B927
References
FOIA-84-459 TAC-54185, NUDOCS 8403160106
Download: ML20127B352 (4)

Text

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• NUCLEAR REGULATORY COMMisslON

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1984 MEMORANDUM FOR: R. Wayne Houston, Assistant Director for Reactor Safety, DSI FROM: Walter R. Butler, Chief, Containment Systems Branch, DSI

SUBJECT:

CSB RELATED INPUT RE: RE-REVIEW 0F THE GRAND GULF, UNIT 1 TECHNICALSPECIFICATIONS(TAC _#54185)

Reference:

Memorandum from R. J. Mattson to R. W. Houston et al, '

dated February 27, 1984 The Containment Systems Branch (CSB) has completed its re-review of the Technical Specifications, (TS) fqr Grand Gul.f, Unit 1. The objective of the re-review was to verify that the TS were properly derived from the analyses and evaluations included in the FSAR. The CSB review was focused on TS Section 3/4.6 as-it compares with FSAR Section 6.2.

Enclosure (1) identifies the specific TS sections that were reviewed by the CSB.

Enclosure (2) identifies differences between the TS and FSAR. Enclosure (3) contains our recommended changes for the Grand Gulf TS, assuming the recommenda-tions from-our last TS review (November 1983) will be adopted. These prior changes have not been incorporated in the present version of the TS. We consider the most significant finding from our TS re-review to be the non-implementation of our prior recommendations.

Another item that was uncovered during the re-review is an apparent discrepancy in the acceptance value of the inleakage for the secondary containment. .TS Surveillance Requirements Section 4.6.6.1.b.2 indicates a flow rate of 4000 cfm.

Based on conversations with the AEB, the flow rate.should be changed to 2300 cfm '

to be consistent with the AEB evaluation. This item will be discussed further with the applicant and AEB to assure proper implementation into the TS of the more conservative value. There also were several numerical discrepancies as identi-1 1

fied in Enclosure (2). 'We consider these differences to have no impact on  ;

containment response analyses and therefore no changes to the TS are recommended. l 1

The CSB has also reviewed the TS basis section which summarizes the reasons for the specifications. The TS basis section is not part of the TS. . However, for

. completeness, we had reviewed this section which corresponds to the topics in

• Enclosure _(1). Certain parameters in basis Sections 3/4.6.1. 7, 3/4.6.2. 5 and 3.4.6.3 do not appropriately reflect the main TS sections. Accordingly, we recommend the following changes:

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R., Wayrre Houston ~ (1) Regarding basis section 3/4.6.1.7, the containment to auxiliary building differential pressure is limited to -0.1 and 1.0 psid rather than -2.0 to 0. psid, (2) Regarding basis section 3/4.6.2.5, the maximum external drywell pressure differential is limited to 0.1 psid rather than 1.0 psid.

! (3) Regarding basis section 3/4.6.3, the minimum suppression pool volume should be 135,291 cubic feet rather than 135,145 cubic feet.

D Walter R. Butler, Chief l Contairment Systems Branch l Division of Systems Integration

Enclosures:

i As stated cc: R. Capra D. Houston D. Hoffman J. Read l T. Quay A. Schwencer l

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ENCLOSURE (1)

GRAND GULF, UNIT 1 - TECHNICAL SPECIFICATIONS:

LIMITING CONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS THE CONTAINMENT SYSTEMS BRANCH SCOPE OF REVIEW:

3/4.6.1 PRIMARY CONTAINMENT 3.6.1.1 Primary Containment Integrity 3.6.1.2 Containment Leakage 3.6.1.3 Containment Air Locks 3.6.1.5 Feedwater Leakage Control System 3.6.1.6 Containment Structural Integrity 3.6.1.7 Conta'inment InteYnal Pressure

'3.6.1.8 Containment Average Air Temperature 3.6.1.9 Con'tainment Purge System 3/4.6.2 DRYWELL

3. 6 . 2.1 Drywell Integrity 3.6.2.2 Drywell Bypass Leakage 3.6.2.3 Drywell Air Locks 2.6.2.4 Drywell Structural Integrity 3.6.2.5 Drywell Internal Pressure 3.6.2.6 Drywell Average Air Temperature 3/4.6.3 DEPRESSURIZATION SYSTEMS

3. 6. 3.1 Suppression Pool 3.6.3.2 Containment Spray 3.6.3.3 Suppression Pool Cooling 3.6.3.4 Suppression Pool Makeup System 3/4.6.4 CONTAINMENT AND DRYWELL ISOLATION VALVES 3/4.6.5 DRYWELL POST-LOCA VACUUM BREAKERS 3/4.6.6 SECONDARY CONTAINMENT 3.6.6.1 Secondary Containment Integrity 3/4.6.7 ATMOSPHERE CONTROL 3.6.7.1 Containment and Drywell Hydrogen Recombiner Systems 3.6.7.2 Containment and Drywell Hydrogen Ignition System 3.6.7.3 Drywell Purge System 5 . '2. c o un , w %T

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ENCLOSURE (2)

GRAND GULF TECHNICAL SPECIFICATIONS /FSAR COMPARISON 3 / 4 . G .3, (1) Maximum suppression pool water volume:

Tech. Spec. Page 3/4 6-20 / FSAR Table 6.2-50 138,851 cubic feet 138,701 cubic feet (2) Max / Min equivalent suppression pool water level:

Tech. Spec. Page 3/4 6-20 / FSAR Table 6.2-50 18'10" 18'9-3/4" 18 ' 4-3/4 18'4-1/12" e

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