ML20134P632

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Forwards Request for Addl Info Re Containment Purging & Venting During Primary Containment.Response Requested within 30 Day of Ltr Receipt
ML20134P632
Person / Time
Site: Pilgrim
Issue date: 08/29/1985
From: Vassallo D
Office of Nuclear Reactor Regulation
To: Harrington W
BOSTON EDISON CO.
References
NUDOCS 8509060391
Download: ML20134P632 (3)


Text

, r-August 29, 1985 Docket No. 50-293 ,,DISTRIRUTION Pleech C.; Docket File f

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0 ELD NRC PDR ~""" ELJordan Local PDR BGrimes ORB #2 Reading JPartlow Mr. William D. Harrington HThompson ACRS (10)

Senior Vice President, Nuclear SNorris Gray File Boston Edison Company 800 Boylston Street Boston, Massachusetts 02199

Dear Mr. Harrington:

SUBJECT:

REQUEST FOR INFORMATION RELATIVE TO CONTAINMENT PURGING AND VENTING Re: Pilgrim Nuclear Power Station Your letter dated April 1,1985 provided a response, in Item 1.c., to our previous request for information relative to minimizing purging / venting of the primary containment during operation of the Pilgrim Station.

Concerning that response, we have three questions which are listed in the enclosure to this letter.

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Please respond to this request within 30 days of receipt of this letter.

The reporting and/or recordkeeping requirements of this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, Original signed by/

Domenic B. Vassallo, Chief Operating Reactors Branch #2 Division of Licensing

Enclosure:

As stated cc w/ enclosure:

See next page ORB 2:DL ORB #2:M' . O #2:DL SN s:rc PLeech W DVassallo 08/5/85 08/6'/85 08/41/85 i

8509060391 850829 1 DR ADOCK O g3 i

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Mr. William D. Harrington Boston Edison Company Pilgrim Nuclear Power Station cc:

Mr. Charles s1. Mathis, Station Mgr. Thomas A. Murley Boston Edison Company Regional Administrator RFD #1, Rocky Hill Road Region 1 Office Plymouth, Massachusetts 02360 U. S. Nuclear Regulatory Commission 631 Park Avenue Resident Inspector's Office King of Prussia, Pennsylvania 19406 U. S. Nuclear Regulatory Commission Post Office Box 867 Mr. A. Victor Morisi Plymouth, Massachusetts 02360 Boston Edison Company 25 Braintree Hill Park Mr. David F. Tarantino Rockdale Street Chairman, Board of Selectman Braintree, Massachusetts 02184 11 Lincoln Street Plymouth, Massachusetts 02360 Office of the Conmissioner Massachusetts Department of Environmental Quality Engineering One Winter Street Boston, Massachusetts 02108 Officelof the Attorney General 1 Ashburton Place 19th Floor

. Boston, Massachusetts 02108 Mr. Rnbert M. Hallisey, Director Radiation Control Program Massachusetts Department of Public Health 150 Tremnnt Street Boston, Ma'ssachusetts 02111 4

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ENCLOSURE PILGRIM PURGE / VENT REQUEST FOR ADDITIONAL INFORMATION The following request for additional information stems from a review of the licensee's submittal of 1 April 1985.

1. In the submittal it is stated that 17 seconds was used as the valve closure time in the radiation release calculation, even though the Tech Spec requires valve closure in 10 seconds. In the Tech Spec (Amendment 42, 12 May 80) the valve closure time is given as 15 seconds. In our telecon of 31 Jul 85 you stated the following: (1) the 10-second valve closure time was incorrect, (2) 15 seconds is the correct Tech Spec value; and (3) a 2-second delay is assumed for pressure buildup plus electronic delay to account for the difference between 15 seconds and 17 seconds will be changed. Please verify that the above information is correct.
2. Provide the analyses which show that the ductwork, filters, fans, and any other safety equipment outboard of the purge / vent valves will survive a DBA-LOCA. Describe any equipment (moisture separators, heaters, coolers) in the purge / vent lines that may reduce the damage potential of the air-steam effluent due to a LOCA.
3. On page 2 of your submittal you quote a release rate of 161,000 lbm/hr.

Please provide either the calculations or the assumptions and methodology in sufficient detail to allow verification of this value.

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