NUREG/CR-4540, Forwards BNL 861117 Request to Amend Page 60 of NUREG/CR-4540, Review of Seabrook Psa:Containment Modes & Radiological Source Terms, to Clarify Wording Re Conditional Failure Probability

Forwards BNL 861117 Request to Amend Page 60 of NUREG/CR-4540, Review of Seabrook Psa:Containment Modes & Radiological Source Terms, to Clarify Wording Re Conditional Failure Probability

ML20207F462
Person / Time
Site:	Seabrook
Issue date:	12/31/1986
From:	Benaroya V Office of Nuclear Reactor Regulation
To:	Noonan V Office of Nuclear Reactor Regulation
Shared Package
ML19306D588	List: ML20197D222 ML20205L245 ML20207A140 ML20207F465 ML20207Q051 ML20207Q052 ML20207S785 ML20207T164 ML20207T271 ML20207T335 ML20207T387 ML20207T396 ML20207T407 ML20207T416 NUREG/CR-4540, Forwards BNL 861117 Request to Amend Page 60 of NUREG/CR-4540, Review of Seabrook Psa:Containment Modes & Radiological Source Terms, to Clarify Wording Re Conditional Failure Probability
References
RTR-NUREG-CR-4540 NUDOCS 8701060024
Download: ML20207F462 (1)

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DEC 311!B6 MEMORANDUM FOR: Vincent Noonan, Director PWR Project Directorste f5, DPLA FROM: Victor Benaroya, Chief Facilities Operations Branch, DPLA

SUBJECT:

AMENDMENT FOR'BNL REPORT "A REVIEW OF THE SEABROOK PSA: CONTAINMFNT MODES AND RADIOLOGICAL SOURCE TERPS" PRA; NUREG/CR-4540 Enclosed is a copy of a recent comunication from Brockhaven National Laboratory concerning this review of the Seabrook PRA. They have indicated they wish to amend several pages in their final report due to wording in the )

original which they concluded did not ccnvey their intended meaning. The significant change pertains to page 60, where they originally wrote: )

."There failure isto negligible isolate". probability of prompt containment failure or This has been amended to read:

"There is negligible probability of prompt containment failure".

The reason for this change is a finding provided earlier in their report where theyindicatedabeliefthatfailuretoisglatewouldbe,greaterthanthe conditional failure probability of 4 x 10- to 2 x 10 ' associated with a sub-atmospheric containment, a further indicated the conditional failure probability may approach 410-This amendment is readily incorporated into the BNL NUREG/CR submitted to us

. for publication since we are still processing the publication authorization.

We request, by way of this memorandum, that W. Yanez substitute the amended pages. A copy of the enclosure should also go to the PDR and the PSNH.

r u' Victor Benaroya, Chief Facilities Operations Branch

Enclosure:

As stated cc: 'S. Long W. Yanez V. Nerses -

C. E. Rossi G. Bagchi W. Lyon '

S. Newberry N

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