ML19350D544
| ML19350D544 | |
| Person / Time | |
|---|---|
| Site: | McGuire  |
| Issue date: | 03/05/1981 |
| From: | Ross D Office of Nuclear Reactor Regulation |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| TASK-AS, TASK-BN-81-03, TASK-BN-81-3 BN--81-03, BN-81-3, NUDOCS 8104160500 | |
| Download: ML19350D544 (2) | |
Text
.-
f 7
'o, UNITED si ATES NUCLEAR REGULATORY COMMISSION g y., '. j WASHING T ON, D. C. 20555
.p3y
,,c.f,W-[.
ah e
f MR 5W Docket No. : 50-369 MEMORAND'JM FOR: Darrell G. Eisenhut, Director Division of Licensing rROM:
Denwood F. Ross, Jr., Director Division of Systems Integration STAFF APPRAISAL SUPPORTING THE MCGUIRE BOARD NOTIFICATION
SUBJECT:
,(BN 81-03)
Letter from R. A. Bari (BNL) to J. F. Meyer (NRC) dated RE FERENCE:
23, 1981 with enclosed BNL memorandum entitled Janua ry "Some Very Preliminary Results of a Short-Term Analysis (3 week study) of Hydrogen Combustion During Degraded Core Accidents in the Sequoyah Nuclear Power Plant in the Presence of Glow Plugs.
In my memorandum to you dated March 2,1981, I requested that the reference aterial be sent to the McGuire Board as a Board Notification of relevant The following staff appraisal is submitted in accordance with iafomation.
NRR Office Letter 19 Revision 1, in support of the requested Board Notification.
l The reference document summarizes preliminary results of a short-term study The study considered certain conducted by BNL under sponsorship of NRR.
technical aspects associated with installing a hydrogen control distributed igr.ition system. The technical aspects of the review were: (1) to consider accident sequences not considered by TVA in its study of the efficacy of the ignition system and (2) to consider variations (parametrics) on the sequence assumed by TVA in its analysis (small-break LOCA with a loss of ECCS in the injection mode).
The study was conducted to provide supportive infomation to aid the staff in The material its preparation of Supplement #4 to the Sequoyah Nuclear Plant.
has direct relevance to the McGuire Nuclear Station's proposed distributed since the McGuire ice condenser containment design is similar i
ignition system, to that of Sequoyah.
The study supports the conclusions reached by TVA, Duke, and the staff that there are no identified accident sequences that are made worse due to the However, although TVA had concluded that the l
operation of the igniters.
igniters would be effective for a wide range of accidents and associated releases, BNL's conclusions as to the system's effective' ness were limited to a more restrictive range of events.
8:104160 Scc i
O
~
Darrell G. Eisenhut ibuted ignition In summary, the BNL study supports the position that the distr it differs from system will help improve safety and reduce risk; howev ill provide.
y It must be emphasized that the conclusions reached in the study a preliminary and based upon a study that was conducted over a vThe BNL is continuing to perform additional analyses.
l l
following the considering the conclusions reached in the study and is c ose y of time.
additional analyses being performed at BNL, Q~ '.
N d(,}Ludd3ML'b,k
. Ross, Jr., Director Denwood Division of Systems Integration L. Rubenstein ec:
P. Check T. Spets W. Butler J. Scinto J. Meyer C. Tinkler R. Birkel e
e-l
. _ -,