ML16301A070
| ML16301A070 | |
| Person / Time | |
|---|---|
| Issue date: | 03/10/1987 |
| From: | Fraley R Advisory Committee on Reactor Safeguards |
| To: | Stello V NRC/EDO |
| References | |
| D870310 | |
| Download: ML16301A070 (2) | |
Text
D870310 MEMORANDUM FOR: Mr. Victor Stello, Jr.
Executive Director for Operations FROM: Mr. Raymond F. Fraley Executive Director, ACRS
SUBJECT:
ACRS COMMENT ON PRIORITIZATION OF GENERIC ISSUE 61:
"SRV DISCHARGE LINE BREAK INSIDE THE WETWELL AIR-SPACE OF BWR MARK I AND MARK II CONTAINMENTS" During the Committees' review of the fourth group of generic issues at the 319th meeting of the ACRS (November 6-8, 1986), the members deferred comment on the subject issue pending additional review. The Committee has now completed review of this matter and its comments are attached.
As the Committee has "agreed with comment" on Generic Issue 61, the members have requested a written response from the NRC Staff to their comments.
Please note that the attached comments recommend the evaluation of a potential new generic issue.
Attachment:
As Stated Comment on Priority Ranking for Generic Issue 61 "Agrees With Comments" Generic Issue No: 61
Title:
SRV Discharge Line Break Inside the
Wetwell Airspace of BWR Mark I and Mark II Containments Priority Ranking Proposed by the NRC Staff: DROP ACRS Comments: The ACRS agrees with the proposed priority ranking for this issue.
However, during our consideration of this issue, a related concern arose: the issue of potential containment overpressuriza-tion given a steam and/or large coolant release in the drywell and bypass to the wetwell airspace through a stuck-open wetwell-to-drywell vacuum breaker (air-return valve). Our inquiries to NRR indicate that this particular accident scenario has never been directly addressed by the Staff. We recommend that NRR evaluate this item as a potential generic issue to ensure its appropriate resolu-tion.