ML20214Q259

Summary of 860904 Meeting W/Util,Plc & Nucon Re Applicant Approach to Charcoal Filter Fire Analyses.Viewgraphs Encl

ML20214Q259
Person / Time
Site:	Seabrook
Issue date:	09/17/1986
From:	Nerses V Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8609240237
Download: ML20214Q259 (16)

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,-.,k UNITED STATES

[ p, NUCLEAR REGULATORY COMMISSION 5 :j WASHINGTON, D. C. 20555

\*****/ 17 SEP 19e5 Docket Nos.: 50-443 and 50-444 APPL.ICANT: Public Service Company of New Hampshire (PSNH)

FACII.ITY: Seabrook Station, Unit I and 2

SUBJECT:

MEETING

SUMMARY

.; On September 4, 1986, representatives of PSNP and others met with the NRC staff to present and discuss the applicant's approach to the charcoal filters fire analyses, .Th.ey noted that 8 charcoal filters (4 safety and 4 I non-safety), which are located in various locations, are involved. The identity of the charcoal filters and their locations are provided in the applicant's attached handout. The amount of charcoal involved in these filters varies from 4000 lbs to 20,000 lbs.

The applicant noted that because a charcoal fire is a slow burning fire that credit can be taken for certain timely actions. Given this, the applicant presented their assumptions (see attached handout) for a charcoal filter fire analysis. The staff noted that the applicant should use 20 minutes (instead of 10 - see item 3 in the attached on " Assumptions / Methods"Ifor the fire brigade's response time. The applicant agreed to use 20 minutes.

The applicant noted that the present detection system is by single temperature, elements. However, they are investigating additional ones such as carbon monoxide detection systems. Whatever the system they select, it's expected to be a reliable one and indication from this system will be provided in the control room.

The applicant noted that charcoal filter CBA-F-8 can burn up and the plant can be safely shutdown. Because this loss can be taken, the applicant intended to modify their Appendix A report to indicate that no analysis will be done for CBA-F-8 nor will additional detection systems be provided. The staff was not in agreement with this position. The applicant agreed to reconsider their position.

The applicant agreed to submit on the docket by September 10, 1986, the description of their analyses, the assumptions used in the analyses, the justification to allow fuel load and precritical operation and the date for formally submitting the analysis.

8609240237 860917 3 PDR ADOCK 0500 F

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2 The applicant had previously committed to incorporating in the FSAR their fire protection program. It was agreed that incorporation may be by reference to specific previous submittals and the NRC approvals where appropriate. The staff requested 'that this be done before issuance of the operating license.

The their applicant had agreed to consider doing this and would inform the staff of planned actions.

Victor Nerses, Project Manager PWR Project Directorate #5 Division of PWR licensing-A cc: See next page i

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. Mr. Robert J. Parrison Public Service Company of New Hampshire .Seabrook Nuclear Power Station cc:

Thomas Dianan, Eso. E. Tupper Kinder, Esq._

John A. Ritscher, Eso. G. Dana Bisbee, Esq.

Ropes and Gray Assistant Attorney General 225 Franklin Street Office of Attorney General Boston, Massachusetts 02110 208 State Hosue Annex Concord, New Hampshire 03301 Mr. Bruce B. Beckley, Project Manager Public Service Company of New Hampshire Resident Inspector Post Office Box 330 Seabrook Nuclear Power Station Manchester, New Hampshire 03105 c/o US Nuclear Regulatory Commission Post Office Box 700 Dr. Mauray Tye, President Seabrook, New Hampshire 03874 Sun Valley Association 209 Summer Street Mr. John DeVincentir, Director Paverhill, Mas'sachu"setts 01839 Engineering and licensing Yankee Atomic Electric Company Robert A. Backus, Esq. 1671 Worchester Road O'Neil, Backus and Spielman Framingham, Massachusetts 01701 116 lowell Street Manchester, New Hampshire 03105 Mr. A. M. Ebner, Project Manaoer United Engineers & Constructors William S. Jordan, III 30 South 17th Street Diane Curran Post Office Box 8223 Parmon, Weiss & Jordan Philadelphia, Pennsylvania 19101 20001 S Street, NW Suite 430 Washington, D.C. 20009 Mr. Philip Ahrens, Esq.

Assistant Attorney General State House, Station #6 Augusta, Maine 04333 Jo Ann Shotwell, Esq.

Office.of the Assistant Attorney General Environmental Protection Division Mr. Warren Hall One Ashburton Place Public Service Company of Boston, Massachusetts 02108 New Hampshire Post Office Box 330 D. Pierre G. Cameron, Jr. , Esq.

Seabrook, New Fampshire 03874 General Counsel Public Service Company of New Hampshire Seacoast Anti-Pollution league Post Office Box 330 Ms. Jane Doughty Manchester, New Hampshire 03105 5 Market Street Portsmouth, New Hampshire 03801 Regional Administrator, Region I U.S. Nuclear Regulatory Commission Mr. Diana P. Randall 631 Park Avenue 70 Collins Street King of Prussia Pennsylvania 19406 Seabrook, New Hampshire 03874 Richard Hampe. Esq.

New Hampshire Civil Defense Agency 107 Pleasant Street Concord, New Hampshire 03301

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Public Service Company of Seabrook Nuclear Power Station l New Hampshire  ;

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Mr. Calvin A. Canney, City Manager Mr. Alfred V. Sargent,  !

City Hall Chairman

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126 Daniel Street Board of Selectmen Portsmouth, New Hampshire 03801 Town of Salisbury, MA 01950 Ms. l.etty Hett Senator Gordon J. Humphrey Town of Brentwood ATTN: Tom Burack RFD Dalton Road U.S. Senate Brentwood, New Hampshire 03833 Washington, D.C. 20510 Ms. Roberta C. Pevear Mr. Owen B. Durgin, Chairman Town of Hampton Falls, New Hampshire Durham Board of Selectmen Drinkwater Road Town of Durham Hampton Falls.,New Hampshire 03844 Durham, New Hampshire 03824 Ms. Sandra Gavutis Charles Cross, Esq.

Town of Kensington, New Hampshire Shaines, Mardrigan and RDF 1 McEaschern East Kingston, New Hampshire 03827 25 Maplewood Avenue Post Office Box 366 Portsmouth, New Hampshire 03801 Chairman, Board of Selectmen RFD 2 South Hampton, New Hampshire 03827 Mr. Guy Chichester, Chaiman Rye Nuclear Intervention Mr. Angie Machiros, Chairman Committee Board of Selectmen c/o Rye Town Hall

• for the Town of Newbury 10 Central Road Newbury, Massachusetts 01950 Rye, New Hampshire 03870 Ms. Cashman, Chairman Jane Spector Board of Selectmen Federal Energy Regulatory Town of Amesbury Commission Town Hall 825 North Capital Street, NE Amesbury, Massachusetts 01913 Room 8105 Washington, D. C. 20426 Honorable Peter J. Matthews Mayor, City of Newburyport Mr. R. Sweeney Office of the Mayor New Hampshire Yankee Division City Hall Public Service of New Hampshire Newburyport, Massachusetts 01950 Company 7910 Woodmont Avenue Mr. Donald E. Chick, Town Manager Bethesda, Maryland 20814 Town of Exeter 10 Front Street Mr. William B. Derrickson Exeter, New Hampshire 03823 Senior Vice President Public Service Company of New Hampshire Post Office Box 700, Route 1 Seabrook, New Hampshire 03874

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ATTENDEES David M. Pepe YNSD Alexander R._Klein YNSD

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Mike Mowrer PLC J. Louis Kovach NUCON Steven West NRC/NRR/PWR8/PDf6 Bill Cloutier YNSD - lead Systems Eng.

Amarjit Singh NRC/NRR/PWR-A/PSB Victor Nerses , NRR/NRR/PWR-A/PD#5 l

6e CHARC0AL FILTER FIRE ANALYSIS ,

IfiTRODUCTION - BILL CLOUTIER OVERVIEW - LOCATION OF FILTERS - D. M. PEPE -

FIRE DETECTION -ISOLATION OF. FORCE FLOW - D. M. PEPE FIRE BRIGADE RESPOND - D. M. PEPE IGNITION OF CHARC0AL - (NUCON) - LOUIS K0VACH CHARC0AL FIRE EFFECTS - NUCON/PLC - LOUIS K0VACH/ MICHAEL M0WRER FILTER BOX TEMPERATURES - PLC - AFFECT ON TARGET - MICHAEL M0WRER MODIFICATION TO APPEllDIX A, APPENDIX R - DOCUMENTATION - D. M. PEPE i

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ASSUMPTICMS/ METHODS- , Charcoal Filter Analyze

. 1. Fire will be detected by~ reliable system.

2. From detection, alarmed in Control Room. Operative per Operating Procedure will shut down air flow to the filters. Assume five minutes time from alarm conditions to shutdown of air flow. .

3. Fire Brigade will respond to the charcoal filter within lg[ minutes from notification by Control Room for all areas except containment. Control Room will notify Fire Brigade within minutes from detection of charcoal fire.

The notification is per Operating Procedures.

4. Once Fire Brigade, fully equipped, responds to charcoal filter unit fire location, can establish and isolate the effect of charcoal filter fire on the surrounding equipment, structures, within 5 minutes time.

5. Ignition of the charcoal starts at the top of the charcoal panel.

This is assumed conservative since a fire located lower on the panel would burn the retaining mesh and drop the charcoal from the air flow path precluding rapid fire propagation.

6. Since a fire can not be started due to decay heat internally, the fire must be started from an external source. Assume an outside source is carried into the filter unit. All the units have Hepa Filters on the inlet before the charcoal bed. Each Hepa Filter is made up of a grouping of Hepa filter elements 24" X 24" X 11-1/2". Each element is a throwaway, extended medium, dry-type filter, which are open face, rectangular, fire-resistance type design for radioactive service. Assume the source carried internal by air flow ignites one Hepa filter element, 2' X 2' totally. This 2' X 2' filter element is assumed to ignite a charcoal panel 4 ft. ,

7. With a 2' X 2' section of carbon burning and an air flow vel. of 40 fpm the analysis will determine the effect a carbon fire will have on adjacent filter panels. Panels on each side and opposite the panel of fire origin will be analyzed to determine fire propagation as a conservative approach. The effect of the fire on the charcoal filter box itself for structural integrity will be analyzed during the time of high ventilation rate and rapid fire growth. Subsequent effects of a slow burning fire during air flow isolation will be continued to determine total effects on the charcoal filter box.

8. Air flow through the charcial panels is assumed to be from the start of ignition. a 4 ft.2 area of charcoal will burn under air flow condition for a period of 5 minutes time. At this point forced air flow has stopped and the resulting fire will be analyzed under natural draft air flow. Air leakage through dampers will be assumed. This time period will be 10 minutes for all filters except CAH.

9. The burning rates are __. They were determined for forced air flow for a period of 15 minutes for CAH.

10. Once the charcoal filter box temperature profiles are know, the effect of the charcoal filter box on targets will be determined. Targets will be structure steel and equipment needed for safe shutdown of the plant. Radiant heat as well as convection heat will be reviewed. The time period analyzed will be from time I of detection to the time of fire brigade isolates and filters effect to targets.

This is to be __ minutes. The fire brigade will be usina one hose streams of 50 gym to cool the charcoal filter housing. Look at the affect of heatup of air passing through filter through ductwork.

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-2 The applicant had previously committed to incorporating in the FSAR their fire protection program. It was agreed that incorporation may be by reference to specific previous submittals and the NRC approvals where appropriate. The staff requested that this be done before issuance of the operating license.

The applicant had agreed to consider doing this and would inform the staff of their planned actions.

M Victor Nerses, Project Manager PWR Project Directorate #5 Division of PWR t.icensing-A cc: See next page 1

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Meeting Summary Distribution

. Docket or Central File ' NRC Participants NRC PDR Local PDR PD#5 Reading File Steven West _ .

J. Partlow Amarjit Singh V. Noonan Victor Nerses Project Manager 0GC-Bethesda E. Jordan B. Grimes ACRS (10)

M. Rushbrook cc: Licensee and Plant Service List I