ML20086A406

Submits GE Perspective on 950619 Mgt Video Conference W/Ge & EPRI at GE Facility in San Jose,Ca & NRC & DOE & DOE Facility in Germantown,Md.Visual Aids Used at San Jose Facility Encl

ML20086A406
Person / Time
Site:	05200004
Issue date:	06/20/1995
From:	Quinn J GENERAL ELECTRIC CO.
To:	Quay T Office of Nuclear Reactor Regulation
References
MFN-092-95, MFN-92-95, NUDOCS 9507030213
Download: ML20086A406 (15)

Text

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GEh'eclearEnergy  ;

t J. E. Quinn, Pr

• s Mena9er GeneralElectn'c Company .l i' ' LMR and SB Programs . 175 Curtner Annue, MC 165 San Jose, CA 95125-1014 '

p . 406 925-1005(phone) 408 925-3991(facsimile) l

- June 20,1995 MFN 092 Docket STN 52-004 -i INcument Control Desk'  :

U . U. S. Nuclear Regulatory Commission j Washington DC 20555 - l l

Attention: Theodore E. Quay, Director Standardization Project Directorate l

Subject:

SBWR - June 19,1995 Management Video Conference j i

Dear Mr. Quay,

The following notes reflect GEs perspective on the subject meeting with GE and EPRI at -

the GE Nuclear Energy Video Conference facility in San Jose, California, and the NRC and l DOE at the DOE Video Conference facility in Germantown, Maryland. The~ visual aids used ' l at the San Jose facility are attached. The objectives of the meeting were: 1) to assure t communication among the interested parties (NRC, DOE, EPRI, and GE) regarding the  !

information to be provided. in document submittals; 2) review commitments between the j applicant and the NRC; 3) identify any issues;' and, 4) agree on ac_tions. The ' meeting l

objectives were accomplished, and the efficiency of the interaction method (Video Conference) - ,

and the resultant savings in travel costs and time were generally acknowledged.  !

l

' GE presented an overview of the SBWR Commitment Tracking System which had been j reviewed in much greater detail with NRCs Jim Wilson on June 15-16, 1995 at GE in San: .

j Jose. GE also reviewed the status of the test and analysis programs. It was agreed that the- 'l test programs were progressing well and it was noted that significant additional test results will l become available for NRC review throughout the balance of 1995. The analytical plan was - i discussed with emphasis on key document submittals for NRC review.  ;

i

' A number of issues regarding review schedules were identified:

1) The review of previous NRC TRACG submittals: l 1

- Responding to the recent receipt of 86 RAls on the Qualification LTR' document is a  :

challenge since the original technical staff who prepared the documents are not generally i available. GE does not understand the delay in providing these RAIs, since according to NRC 1 billing records, the key review seems to have been perj)rmed between June 1993 and t

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9507030213 950620 /J

DR ADOCK 05200004 O PDR

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GENuclearEnergy December 1994. Perhaps some of the RAls could have been provided earlier in the process.

- Additionally, these RAIs were unexpected based upon the prior. discussions on this topic between GE and NRC and their consultants. This situation emphasizes the need for timely review of submittals to reach closure on these important documents. NRC agreed to expedite a.teleconference between GE, NRC and BNL to discuss the 14 (of the 86) RAls of most -

concern to GE.

2) The projected time to review scheduled future submittals:

The dates provided by the NRC staff to review scheduled future submittals will significantly impact the SBWR schedule. Examples include: four months to review the TAPD Rev. C which will be issued at the end of August 1995; October 1995, for the DSER of the TRACG Model LTR which was submitted February 1993, and for which RAIs were received and answered; no committed date for the Qualification LTR submitted February 1993, and for which RAls were just received and GE responses are being prepared; and finally, a two (2) year schedule for review of the three TRACG final submittals even though the current versions at NRC are already receiving extensive review.

3) Closure of Vacuum Breaker Exemption Request No action has been taken by the NRC on the February 1995, GE letter requesting NRC review. The NRC agreed to assess what will be required in terms of resources and time to complete this review. The NRC has reviewed the details of the valve, and witnessed the tests in May and October 1994, and received the test reports. .

Identification of these issues for resolution is a positive result of the meeting. Followup action is required. The constraints on NRC resources are recognized but the impacts on the SBWR Program could be severe and thus a constructive dialogue seems to be required. GE recommends this take place in about one month, which will permit closure on the already identified actions.

Sincere -:p ,, 7 -

} J4 , Projects Manager

-b n and SBWR Programs

Attachment:

Visuals used in San Jose during the June 19,1995 Video Conference meeting cc: P. A. Boehnert (NRC/ACRS) (2 paper copies w/att. plus E-Mail w/o att.)

. . I. Catton (ACRS) (1 paper copy w/att. plus E-Mail w/o att.).

~[ S. Q. Ninh (NRC) (2 paper copies w/att. plus E-Mail w/o att.)

J. H. Wilson (NRC) (1 paper copy w/att. plus E-Mail w/o att.)

~

a GENuclear Energy SBWR GE/NRC/ DOE /EPRIManagement VideoConference Meeting June 19,1995

a Agenda .

• Introduction

• NRC Responses to TAPD Rev-B

• Tracking System of Deliverables to NRC and expected responses / actions by NRC

• Summary of Testing Program Status and near term expectations

- Systems Interaction Test Matrix - NRC concurrence with only 4 tests

• Response of NRC to requests in our May letter MFN No. 071-95 on the three TRACG documents and the TAPD Rev-C i

- TRACG Qualification (NED-32177) RAls

- BestEstimate Codes

• Vacuum Breaker Single Failure Exemption Request

• Closure & Follow-up Actions

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SBWR Commitment Tracking System Completed, Thru 10/94 1

Open, I Delayed  ;

Design Review Commitments A

y Topical Lists

• NRC Log.xis ** Partial l TestDocs '

• Open 611tems l

• Completed TRACGdel  !

0395fwitg RAls900.96> 101 RAls901.75> 160  ;

l Plan. ppt

• Please use open sheet format i i

4

" ' ~

Open RAls and Commdments Source or Due ID or RAI Date Date No. ENGR CHKR From Received Comments or Action 1/0/00 Licensing Topical Report (LTR) NEDE-32177P, Rev.1 901.079 JGMA BSS NRC 5/25/95 (TRACG Qualification) 1/0/00 901.080 Licensing Topical Report (LTR) NEDE-32177P, Rev.1 JGMA BSS NRC 5/25/95 (TRACG Qualification) 1/C90 901.083 ' Licensing Topical Report (LTR) NEDE-32177P, Rev.1 BSS NRC 5/25/95 JGMA (TRACG Qualification) 1/0/00 901.087 JGMA BSS NRC 5/25/95 *" "9 E 8' E b I ~ ' ' #'

(TRACG Qualification) 1/0/00 901.089 WU BSS NRC ens 09 psal Repo4M) NEDE-32179, Rev.1 4

5/25/95 (TRACG Qualification) 1/0/00 901.091 YKC Licensing Topical Report (LTR) NEDE-32177P, Rev.1 BSS NRC 5/25/95 (TRACG Qualification) 1/0/00 901.093 YKC Licensing Topical Report (LTR) NEDE-32177P, Rev.1 BSS NRC 5/25/95 (TRACG Qualification) 1/0/00 901.094 L censing Topical Report (LTR) NEDE-32177P, Rev.1 PE BSS NRC 5/25/95 (TRACG Qualification) 1/0/00 901.097 Licensing Topical Report (LTR) NEDE-32177P, Rev.1 JGMA BSS NRC 5/25/95 (TRACG Qualification) 1/0/00 901.100 JGMA BSS NRC ns g ep ( E42W, Rev.1 5/25/95 (TRACG Oualification) 1/0/00 901.105 JRF BSS NRC, 5/25/95 ""* 9 E 8' E ) ~

frRACG Oualification) 1/0/00 901.111 JGMA BSS NRC 5/25/95 ens ng p cal ep d 4 ) EDE-3217F, Rev.1 (TRACG Qualification) 1/0/00 901.137 JRF Licensing Topical Report (LTR) NEDE-32177P, Rev.1 BSS NRC 5/25/95 (TRACG Oualification) 1/0/00 901.152 JGMA Licensing Topical Report (LTR) NEDE-32177P, Rev.1 BSS NRC 5/25/95 (TRACG Oualification) 1/0/00 950.42 NRC NRC GE 133- en gs m al ula ns t GE, so 94 that Ge can send them to Dodewaard.

4/13/95 A A H N ATE PFB3 TRM JLT N 6/14/94 RETURN VALVE OF IC MFN 95- ^'"'***"*" 9* 9*

5/15/95 072 Item MFN 95-JET TRM NRC 046 Item 34 3

MFN 95- MFN 95- PANTHERS -IC Test Plan 00097PP91 5/15/95 072 Item PFB TRM NRC 046 Items 52 28,33,34 MFN 95- GIRAFFE - Helium Instrumentation Drawing Package 5/19/95 072 Item MH TRM NRC 26

, MFN 95- MFN 95- GIRAFFE - Helium Test Plan and Procedures (T1,H1-5/19/95 072 Item MH TRM NRC 046 Items H4,T2) TOGE110-T07 28 28.34,35 Page 1

j Open RAls Ond Commitments

s. . .

Source or l Due ID or RAl Date  !

Date No. ENGR CHKR From Received Comments or Action I MFN 95- PANDA Apparent Test Results (S1-S6). Schedule for i 6/1/95 072 Item JET TRM NRC S7-S9 to be determined.

8 I MFN 95- GIRAFFE - Helium As-Built Drawing Package 6/2/95 072 ftem MH TRM NRC 25 MFN 95- GIRAFFE - Helium Apparent Test Results (T1,H1,H2) 6/16/95 072 Item MH TRM NRC ,

29 ,

6/16/95 N/A NRC NRC GE Written concurrence with TAPD Rev. B 95 MFN 95- PANTHERS - IC Pre-Test Analysis Package -

6/19/95 072 Item JRF BSS NRC '

57 i MFN 95- PANTHERS /PCC Data Analysis Report 6/23/95 072 Item PFB TRM NRC 49 6/26/95 900.097 JDD Systems integral testing (SIT) at the GIRAFFE test BSS NRC 5/25/95 facility.

6/26/95 Systems integral testing (SIT) at the GIRAFFE test I 900.098 JDD TRM NRC 5/25/95 facility.

6/26/95 900.099 JDD TRM Systems integral testing (SIT) at the GIRAFFE test NRC 5/25/95 facility.

6/26/95 Systems integral testing (SIT) at the GIRAFFE test 900.100 JDD TRM NRC 5/25/95 facility.

6/26/95 900.101 JDD TRM NRC ys ems integ@esdng (SU) at me GIRARE test 5/25/95 facility.

/9 H mee ng n A HERS#CC resuus.

6/27/95 NA PFB TRM NRC phone call Evaluation of data and how they will be used.

6/28/95 328.01 MH TRM NRC 3/28/95 GIRAFFE / HELIUM 6/28/95 328.02 MH TRM NRC 3/28/95 GIRAFFE HELIUM ,

6/28/95 328.03 MH TRM NRC 3/28/95 GIRAFFE FACILITY 6/28/95 328.04 MH TRM NRC 3/28/95 GIRAFFE FACILITY 6/28/95 328.05 MH TRM NRC 3/28/95 GIRAFFE FACILITY 6/28/95 328.06 MH TRM NRC 3/28/95 GIRAFFE NON-CONDENSABLES 6/28/95 328.07 MH TRM NRC 3/28/95 GIRAFFE NON-CONDENSABLES

• 6/28/95 328.08 JET TRM NRC 3/28/95 PANDA NON-CONDENSABLES l 6/28/95 328.09 TRM NRC 3/28/95

^

B 6/28/95 328.10 REG BSS NRC 3/28/95 - SCALING - GIRAFFE / HELIUM 6/28/95 328.11 REG BSS NRC 3/28/95 SCALING - GIRAFFE / HELIUM 6/28/95 328.12 REG BSS NRC 3/28/95 SCALING - GIRAFFE / HELIUM 6/28/95 328.13 REG BSS NRC 3/28/95 SCALING - GIRAFFE / HELIUM 6/28/95 328.14 JRF BSS NRC 3/28/95 CONTAINMENT MODEL 6/28/95 328.15 JRF BSS NRC 3/28/95 CONTAINMENT MODEL 6/28/95 328.16 i JRF BSS INRCl 3/28/95 CONTAINMENT MODEL Page 2

Open RAls and Commitments 3

Source or Due ID or RAI Date Date ' No. ENGR CHKR From Received Comments or Action 6/28/95 328.17 I JRF BSS NRC 3/28/95 DRYWELL MIXING 6/28/95 328.18 JRF BSS NRC 3/28/95 TRACG QUALIFICATION 6/28/95 328.19 JRF BSS NRC 3/28/95 TRACG QUALIFICATION 6/28/95 328.20 JRF BSS NRC 3/28/95 TRACG QUAllFICATION

)

6/28/95 328.21 JRF BSS NRC 3/28/95 CSAU FOR CONTAINMENT  !

6/28/95 328.22 JRF BSS NRC 3/28/95 CSAU FOR CONTAINMENT l 6/28/95 328.23 JRF BSS NRC 3/28/95 CONTAINMENT MODEL 6/28/95 328.24 A!/SS BSS NRC l 3/28/95 BLIND ANALYSES MFN 95- ^** *"* * * '

6/30/95 072 item JET TRM NRC

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46 MFN 95- GIRAFFE - SIT Test Specification 6/30/95 072 Item JDD TRM NRC I 35 ,

MFN 95-6/30/95 072 Item 95- PANTHERS -IC As-Built Drawing Package I PFB TRM NRC 51 046 item 33 6/30!95 N/A NRC NRC GE Va umm breaker single failure exemption.

9 69

. 6/30/95 N/A NRC NRC GE GIRAFFE SlT - NRC concurrence with only 4 tests '

95 6/30/95 N/A NRC NRC GE DSER on TRACG Model LTR NED-32176 95 MFN 95- PANDA Pre-Tes* Analysis M3 7/3/95 l

072 Item JRF BSS NRC i 11 MFN 95- GIRAFFE - Helium Apparent Test Results (H3,H4) 7/7/95 072 Item MH TRM NRC ]'

31 MFN 95- MFN 95- GIRAFFE - SIT Test Plan and Procedures (11-14) 7/12/95 072 Item JDD TRM NRC 046 Items  ;

36 28,34,35  ;

MFN 95- GIRAFFE - Helium Apparent Test Results (T2) '

-7/21/95 072 Item MH TRM NRC 33

/

7/24/95 901.075 BSS JGMA NRC Li ensing Topicc! Report (LTR) NEDE-32177P, Rev.1 5/25/95 (TRACG Qualification) t 7/24/95 901.076 BSS JGMA NRC Li ensing Topical Report (LTR) NEDE-32177P, Rev.1 j 5/25/95 (TRACG Qualification) 7/24/95 901.077

"' BSS NRC 5/25/95 Li ensing Topical Report (LTR) NEDE-32177P, Rev.1 Blaes.ig l

(TRACG Quahfication) 7/24/95 901.078 JGMA BSS NRC L ensing Topical Report (LTR) NEDE 32177P, Rev.1 5/25/95 i (TRACG Qualification)

Page 3 l

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l NRC Source or ID or RAI Date Due Date No. From Received Comments or Action l Send results from RAMONA calculations to GE, so that GE l 1/1/01 950.42 GE MFN 133-94 can send them to Dodewaard.

6/16/95 NRC GE MFN 071-95 Written concurrence with TAPD Rev. B I 0

6/30/95 NRC GE Vacumm breaker single failure exemption.

6 95 t

6/30/95 NRC GE MFN 079-95 GIRAFFE SIT - NRC concurrence with only 4 tests 6/30/95 NRC GE MFN 071-95 DSER on TRACG Model LTR NED-32176 10/31/95 NRC GE MFN 071-95 SER on TAPD Rev. C i 12/31/95 NRC GE MFN 071-95 DSER on TRACG Qualification LTR NED-32177 5/31/96 NRC GE MFN 071-95 SER on TRACG Model LTR NED-32176 i

9/12/96 NRC GE MFN 071-95 SER on TRACG Qualification LTR NED-32177 9/12/96 NRC GE MFN 071295 SER on TRACG Application LTR NED-32178 l

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Page1

SBWR TestProgram Summary .

e t e

I t

t T.R. McIntyre 1 19 June 1995  ;

SW

_.._._.- .. _.- - - . - . - . . - . . . . . - . - . . . . - . . . _ . . . - . . - . . - . . - . . - . - - . . - . - . - - . . - . . _ - . - . - - . - . ~ - . - _ . . . _ . . _ - _ _ .

1 l PANTHERS l

• Status .

- PCC testing complete 1

(

• Data TransmittalReportissuedandsentto NRC l

l

• Data Analysis Report to be issued this week l

- IC testing starts this summer; Shakedown next month l

• Visits byNRC during PCC testing

- Testing witnessed by D. McPherson and A. Levin

- Results discussed with A. Drozd and J. Kudrick

- Tests also witnessedby ANPA forNRC

- QA brieflyreviewedbyR. McIntyre l

• Expectations from NRC

- QA Inspection on July 19-21,1995 mes

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PANDA

• Status .

l -

Steady State PCCperformance tests o Tests S1 through S6 without PCC header insulation complete i o Tests S7 through S9 will be repeated with improved header insulation .

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IntegralSystems Tests o Facility characterization tests to be completed this month o First test, M3, planned forlate July

• Recent visits byNRC D. McPherson visit after Tests S1 through S6 (May 12)

J. Kudrick visit during S7 through S9 (May 15 through 19) .

Thadani, Jones, other NRC managers on June 14

• Expectations from NRC Observation ofIntegralSystem Test-- August,1995 QA Inspection -- October,1995

e GIRAFFEHelium Series Tests

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• Status ,

Shakedown tests: pressure & heat loss completed Helium tests HI& H2 completed Non-condensable gas sampling documentation for H1 & H2 will be completed this month Helium tests H3, H4 will be completed this month The nitrogen only test T-2 will be completed this month Tie-back test T-1 will be completed by middle of July  :

• Visits byNRC QA inspection June 8-14 by R. McIntyre, J. Peralta, S. Ninh, J. Kudrick, M. Snodderly l

• Expectations from NRC Timely review of GE responses to technical concerns raised during the QA inspection .

em 1

L.._.. ._ _ __.._.__ _ _ _

GIRAFFE- SIT .

.I +

!

• Status Agreement reached on Test Matrix (NRC, GE, Toshiba)

Plan to issue RAIresponses this week Expect to run tests in late August

• Expectations from NRC

- Documentation of NRC concurrence with only 4 tests s/ISSIF

-..4 , , ... ._ . . _2 .~.. .. . . . ,. .__________ ________ _ _ _ _ __

1 e

Expectation from NRC foralltests: -

4 Early feedback on key issues / concerns, ifany i

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--_-__-____--_--_-_----_--___j

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GENuclearEnergy l J. E. Quinn. Pmiects Manager GeneralElectric Company LMR and SBWR Programs 175 Curtner Avenue. MC 165 San Jose, CA 951251014 408 925-100$ (phone) 408 925 3991 (facsimile) l May 11,1995 MFN No. 071-95 Docket STN 52-004 Document Control Desk U. S. Nuclear Regulatory Commission Washington DC 20555 Attention: Dennis M. Cmtchfield, Associate Director for Advanced Reactors and License Renewal Office of Nuclear Reactor Regulation

Subject:

REVISED SCHEDULE FOR REVIEW OF THE SBWR TECHNOLOGY PROGRAM.

References 1. Letter, Dennis M. Crutchfield (NRC) to J. E. Quinn (GE), REVISED SCHEDULE FOR REVIEW OF THE TESTINO AND ANALYSIS PROGRAM DESCRIPTION (TAPD) FOR THE GE SBWR, dated March 21,1995.

2. Letter MFN No. 018-95, J. E. Quinn (GE) to R. W. Borchardt (NRC),

APPROACH TO ACHIEVE CLOSURE OF ITEMS RELATED TO THE GE SBWR TAPD, dated February 14,1995.

3. Letters MFN Nos. 045-95 a.nd 046-95; SBWR Test and Analysis Program Description, NED-32391, Revision B; dated April 13, 1995.

4. Letter MFN No. 052-95, J. E. Quinn (GE) to R. W. Borchardt (NRC), GE PANDA Audit Report, dated April 17,1995.

5. Letter MFN No. 068-95,J. E. Quinn (GE) to T. E. Quay (NRC); SBWR, MINUTES OF TELECON WITH NRC ON APRIL 6,1995; dated April 28,1995.

We have reviewed your Reference 1 letter and appreciate your efrort in evaluating our Februaq 14 letter (Reference 2). This letter addresses our specific expectations from the NRC for documentation of the NRC review of the key near term SBWR Technology Phase submittala.

Test and Analysis Program Description (TAPD) . Revision B:

We feel that we need a timely written expression of agreement (which could take the form of a letter - a DSER is not necessag) that the relevant items have been satisfactorily addressed, or timely Requests for Additional Information (RAls) on the TAPD Rev. B (Reference 3). Testing preparations are nearing completion at all three

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GENuclearEnergy J. E. Quinn, s Manager GeneralBectnc Company LMR and SB Programs 175 Curtner Avenue, wC 165 San Jose. CA 9512s.1014 408 92s 100$ (phone) 408 925-3991(facssmile) l test facilides, and TAPD Rev. B is intended to resolve the key programmatic testing related issues. We have developed Rev. B in close cooperation with the NRC Staff. We would expect the NRC Staff to concur that the issues are fully addressed and that the tests planned are reasonable and acceptable barring any surprises that may come from l the tests. We request you to reevaluate and determine if a written expression of NRC concurrence with TAPD Rev. B could be issued by mid-June 1995.

TAPD Revision C:

TAPD Rev. C is intended to close out the remaining programmatic issues raised in the DSER on the TAPD Rev. A. These relate primarily to the clarification and expansion of the Phenomena Identification and Ranking Tables (PIRT) and completion of global scaling of the test facilities. The TAPD Rev. C will be submitted by the end of August l 1995. GE intends to present this information concurrently to the ACRS Thermal '

Hydraulics Phenomena Subcommittee for their review. We request that you reevaluate and determine if a SER could be issued by the end of October 1995. j I

TRACG Model LTR NED-32176:- l Our understanding is that the TRACG Model Licensing Topical Report (LTR) NED-32176 (submitted in February,1993) review is nearly complete. There have been several rounds of Requests for Additional Information (RAIs) which have been closed for some time. NRC has requested several clarifications and additional detail which has been discussed with the Staff (Reference 5). We request that you consider Usuing a Draft Safety Evaluation Report (DSER) on this LTR mid year 1995 so that we can have a clear appreciation of any remaining NRC concerns. A revision to this LTR will be submitted by the end of 1995; this is ahead of the Reference 2 schedule. This LTR is not dependent on the testing results. We request that you issue a SER by the end of May 1996 (based on 2 months for NRC review and submittal of RAIs to GE,1 month for GE to satisfactorily respond to the RAIs, and 2 months for NRC to issue the Model LTR SER).

TRACG Qualification LTR NED-32177:

Our understanding is that the TRACG Qualification topical report NED-32177 (submitted February 1993) review is also nearly complete. NRC has requested substantial additional information, some of which comes from the Testing part of the Program. We request that you consider issuing a DSER on this LTR by the end of year 1995. A Supplement to this report which has been discussed with the Staff will be submitted April 1996. As indicated in Reference 2 pre-test and preliminary validation calculations are being provided on a timely basis. We request that the review of the Supplement be conducted such that a SER could be issued by mid-September 1996.

1

,= ..' .

GENuclearEnergy l

Y 'B Progra venue E165 San Jose, CA 951251014 406 925-1005 (phone) 406 925-3991 (facsimile) l

' TRACG Application LTR NED-32178: l Our understanding of the TRACG Application topical report NED-32178 (submitted February 1993) review is that it is least complete and most dependent on completion of the testing. and evaluation of calculational uncertainties. It will-_ be revised and resubmitted in April 1996 as indicated in Reference 2.. We have agreed with the Staff to l keep them informed of the testing, the TRACG testing analyses, and the development -

l of the application methodology such that most of the materials included in the April 1996 revision will already have been reviewed. We request that review of the Revision result in an issued SER by mid-September 1996.

As you requested, we have provided a discussion of the actions in response to the PANDA operational readiness review in Reference 4. Those actions required for the PANDA Steady State tests have been completed.

We wish to develop a mutually acceptable schedule, and agree that your timely review-depends in large part on complete and timely submittals by GE. We intend to do this.

4 Sincerely, James E. Quinn, Projects Manager LMR and SBWR Programs cc: P. A. Boehnert (NRC/ACRS)(2 paper copies plus E-Mail)-

I. Catton (ACRS) (1 paper copy plus E-Mail)

S. Q. Ninh (NRC) (2 paper copies plus E-Mail)

J. H. Wilson (NRC) (1 paper copy plus E-Mail)

GE Letter MFN No 071-95 _

Requested NRC RequestedNRC ,

GEItem Response Response Date J

• TAPD Rev.-B Letter 6/16/95

• TAPD Rev.-C '

SER 10/31/95

• TRACG ModelLTR NED-32176 DSER 6/30/95

• TRACG ModelLTR NED-32176 SER 5/31/96 i

• TRACG Qualification LTR i NED-32177 DSER 12/31/95

• TRACG Qualification LTR NED-32177 SER 9/12/96 .

l

• TRACG Application LTR l NED-32178 SER 9/12/96 c:950619

. . _ _ _ - _ _ - _ _ _ - _ . _ _ _ - _ - _ - - - - - _ - - - - _ _ _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - =

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GENuclearEnergy Y S'8 Propom von 165 San Jose, CA 951251014 4o6925-1005(phone) 406925 3991(focaimide) y February 16,1995 MFN No.' 021-95 l Docket STN 52-004.

' Document Control Desk U. S. Nuclear Re latory Commission

. Washington DC 0555

' Attention: Richard W. Borchardt, Director Standardization Project Directorate  !

I

Subject:

Request for Exemption of the SBWR Drywell to Wetwell Vacuum Breaker from the Single

' Failure Criteria

Reference:

1. GEletterMFNNo. 018-95,J. E. Quinn (GE) to .

R. W. Borchardt (NRC), " Approach to Achieve Closure ofItems

. Related to the GE SBWR TAPD," dated 1%ruasy 14,1995.

2. Letter, T. R. McIntyre (GE) to Richard W. Borchardt (NRC),

Responses to the Referenced Letters, l

GE MFNNo.113-94, dated September 26,1994. A

3. Letter, E. Leatherman (GE) to Richard W. Borclusrdt (NRC), ,

NRC tsfor AdditionalInformation (RAls) on the Simpisped J1 Boilin terReactor(SBWR) Design, GEMFNNo. 065-94, dated 2,1994.

The "SBWR Drywell to Wetwell Vacuum Breaker Valve White Paper" Attachment to this letter is the GE response to item No. 42 in Attachment 2 to the Reference 1 letter. The ,

purpose of this paper is to present additional information regarding exemption of the SBWR vacuum breakers from the single failure criteria based on demonstrated reliability..

The paper describes the design features of this special vacuum breaker valve which-significantly improve its leak tightness and reliability performance. The paper also -

presents the rigorous leak tightness, performance, Design Basis Accident (DBA), and reliability testing which the valve has successfully undergone in substantiating this i exemption from the single failure criteria.

In the GE Response to RAI Number 900.63 (Reference 2), a discussion of vacuum breaker actions for analyses, transients and accidents, including a Gravity Driven '

Cooling System (GDCS) line break and discussion of assumptions made for both

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. GENuclearEnergy MFN No. 021-95 Page 2 expected and " licensing basis" scenarios was presented. Reference 2 also included detail as to why failure to close (after actuation) of a drywell to wetwell vacuum breaker is not,-

in GE's view, a credible failure.

L lL In the GE Response to RAI Number 900.62 (Reference 3), information was presented to l enable the staff to access the adequacy of the wetwell-to<lrywell vacuum breaker test

, program including: drawings of the vacuum breaker and instrumentation; the vacuum I

(

breaker Purchase Specifications; a copy of the Engineering Operating Procedure; detailed specification of the conditions, both normal and design basis, under which the vacuum breakers will be required to operate; the detailed test procedures for the vacuum breaker; and information appropriate to ensuring that the data obtained on the reliable performance of the valve is applicable to the valves to be incorporated into the certified plant design.

We hereby request your review of this letter along with the references and approval of -

this request for exemption of the subject vacuum breaker from having to meet the single failure criteria for application to the SBWR.

i Sincerely, 1

1 James E Quinn, Projects Manager LMR and SBWR Programs

Enclosure:

SBWR Drywell to Wetwell Vacuum Breaker Valve White Paper cc: P. A. Boehnert (NRC/ACRS)

I. Catton (ACRS) l S. Q. Ninh (NRC)

J. H. Wilson (NRC)

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