ML20215N504

Forwards Hazards Analysis of Seabrook Station Charcoal Filter Units & Markups of Fire Protection Program Evaluation Per 10CFR50,App R.Potential Heating of Charcoal Filter Steel Housing Will Not Jeopardize Safe Shutdown

ML20215N504
Person / Time
Site:	Seabrook
Issue date:	10/09/1986
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	Noonan V Office of Nuclear Reactor Regulation
Shared Package
ML20215N505	List: ML20215N504 ML20215N508 ML20215N511
References
SBN-1208, NUDOCS 8611060146
Download: ML20215N504 (4)

Text

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.- 4 SEABROOK STATION Engineering Offics October 9, 1986 Public Service of New Hampshire SBN-1208 T.F. H9.6.99, B7.1.2 NEW HAMPSHIRE YANKEE DIVISION United States Nuclear Regulatory Commission Washington, DC 20555 Attention: Mr. Vincent S. Noonan, Project Director PWR Project Directorate No. 5

References:

(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter (SBN-970), dated March 18, 1986, "Seabrook Station Fire Protection Program", J. DeVincentis to V. S. Noonan (c) PSNH Letter (SBN-1193), dated September 17, 1986, "Seabrook HVAC Charcoal Filters Fire Protection",

J. DeVincentis to V. S. Noonan

Subject:

Seabrook HVAC Charcoal Filter Fire Protection

Dear Sir:

Purs ua nt to Reference (c) and as discussed with your Staf f, provided herewith as Attachment A, please find the " Hazards Analysis of Seabrook Station Charcoal Filter Units" Report. The results of this report indicate that the hazards posed by the potential heating of the steel housing of any of Seabrook's charcoal filters due to charcoal l fire will not jeopardize the safe shutdown of Seabrook Station. In ,

addition to this report, the associated markups of Seabrook's Fire Protection Program Evaluation and Comparison to BTP APCSB 9.5-1, Appendix A and Fire Protection of Safe Shutdown Capability (10CFP30, Appendix R) i Reports are provided in Attachments B and C respectively. As a result l of this charcoal filter fire hazard analysis, Deviation No. 13 in Reference (b) should be revised as indicated in Attachment D.

As indicated in Attachments B and C, a carbon monoxide fire detec-tion system will be added to all eight charcoal filters for purposes of early detection. These filter modifications are scheduled to be com-pleted (i.e. , designed, installed, tested, and operational) by July 1987.

8611060146 861009 PDR ADOCK 05000443 F PDR 0(

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' 1 Seabrook Station Construction Field Office P.O. Box 700 Seabrook, NH 03874 J

2 s United States Nuclear Regulatory Commission SBN-1208 Attention: Mr. Vincent S. Noonan Page 2 l

We trust that the above information and Reference (c) is accept-able and request that this be reflected in the next su pplement to Seabrook's SER.

Very truly yours, p j Ant 1 ohn DeVincentis Director of Engineering Attachments cc: Atomic Safety and Licensing Board Service List J

4 s ATTACHMENT D TO SBN-1208 APPENDIX R/ APPENDIX A DEVIATION 1

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j A deviation was requested in PSNH Letter (SBN-970), dated i March 18,1986 (Deviation No. 13), from the requirement that Fire Suppression Systems should be installed to protect charcoal fil-ters in accordance with Regulatory Guide I.52. Modify Deviation No. 13 to delete this request for filters EAH-F-9,69, and FAH-F-41,74. These filters comply with Regulatory Guide 1.52.

Charcoal filters PAH-F-16, CAP-F-40, CAH-F-8, and CBA-F-38 do not

comply with Appendix A to BTP APCSB9.5-1 which references '

Regulatory Guide 1.52, thus a deviation is required for these four i filters.

It is our position that this deviation is justified based on our assertion that no fire would result from a loss of air flow across these charcoal filters. Further, a hazard analysis was conduct'ed, i see Attachment A to SBN-1208, on these filters. The results indi-I cated that if a filter started from external sources, the fire

{ would not jeopardize the safe shutdown of Seabrook Station. ,

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ATTACHMENT A TO SBN-1208 HAZARDS ANALYSIS OF SEABROOK STATION CHARCOAL FILTER UNITS REPORT r

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