ML16340D022
| ML16340D022 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon, San Onofre, 05000000 |
| Issue date: | 12/14/1982 |
| From: | Eisenhut D Office of Nuclear Reactor Regulation |
| To: | Ahearne J, Asselstine J, Gilinsky V, Palladino N, Roberts T NRC COMMISSION (OCM) |
| Shared Package | |
| ML16340D023 | List: |
| References | |
| TASK-AS, TASK-BN82-125 BN-82-125, NUDOCS 8212220434 | |
| Download: ML16340D022 (6) | |
Text
DEC 14 j982 MEMORANDUM FOR:
Chairman Palladino Commissioner Gilinsky Commissioner Ahearne Commissioner Roberts Commissioner Asselstine FROt1:
SUBJECT:
Darrell G. Eisenhut, Director Division of Licensing, Office of Nuclear Reactor Regulation INFORtOTION ITEN - ACRS EVALUATION OF PWR FLOll BLOCKAGE (Board Notification No. 82-125>
82-125A)
Diablo Canyon Nuclear Power Plant, Units 1/2 San Onofre Nuclear Generating Station, Units 2/3 In accordance with present NRC procedures regarding Board Notifications, the enclosed information is being provided for your information as constituting new information relevant and material to safety issues.
This information is applicable to all PWR's.
The notification relates to an evaluation concerning flow blockage during natural circulation which was performed by H. Etherington.
Our assessment has concluded we are in general agreement with all of the points identified in Hr. Etherington's evaluation, and that all of his concerns regarding the phenomena of natural circulation flow blockage have been previously identified by the staff and provided to the boards in Board Notification BN-82-71.
- However, due to the interest in natural circulation and feed and bleed cooling in recent licensing proceedings, we believe it is in the best interest of the regulatory process to make the licensing boards aware of this recent evaluation.
We do not believe that these results adversely ampact our present staff position regarding reliance on natural circulation or the validity of feed and bleed cooling as a defense in depth measure.
Contact:
Suzanne
PDR OFFICE/
SURNAMEQ DATE$
NRC FORM 318 (10-80) NRCM 0240 OFFlClAL RECORD COPY USGPO: 1991~960
+J WQ 0
0 4
DEC i 4 1982 The staff is continuing to pursue with the B8W Owners the requirement for them to provide acceptable integral system experimental test data to aid in code verification and emergency operator procedure evaluation as part of TNI-2 action items II.K.3.30 and I.C.l respectively.
We will inform the boards of significant information if it causes us to change our tech-nical position.
Origi.. '
u Dy
, Darroll G. Eisenh~~
Enclosure:
As stated O
cc:
SECY OGC 08E Darrell G. Eisenhut, Director Division of Licensing Office of Nuclear Reactor Regulation OFFICE II SURNAMEII DATE Q 12/g)/82 12/
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DISTRIBUTION LIST FOR BOARD NOTIFICATION Before the Commission Diablo Canyon Units 1&2, Docket Nos. 50-275/323 OL San Onofre Units 2&3 Docket Nos. 50-361 362 Ns. Elizabeth Apfelberg Nr. Richard E. Blankenburg Nr. Glenn 0. Bright
, Mr. Herbert H. Brown Dr. John H. Buck A. S. Carstens, Mr. Gary D. Cotton Philip A. Crane, Jr.,
Esq.
Stephen F. Eilperin, Esq.
Mr. Frederick Eissler David S. Fleischaker, Esq.
Mrs.
Raye Fleming Phyllis M. Gallagher, Esq.
Arthur C. Gehr,
- Esq, Mr. Byron S. Georgious Dr. Reginald L. Gotchy Mr. Mark Gottlieb Dr. Cadet H. Hand, Jr.
Nrs.
Lyn Harris Hicks Mr. Richard B. Hubbard Nrs. Elizabeth B. Johnson Dr.
W.
Reed Johnson James L. Kelley, Esq.
Janice E. Kerr, Esq.
Charles R. Kocher, Esq.
Dr. Jerry Kline Nr. John Narrs Charles E. McClung, Jr.,
Esq.
Thomas S. Moore, Esq.
Bruce Norton, Esq.
David R. Pigott; Esq.
Joel R. Reynolds, Esq.
Nr. James
- 0. Schuyler Mr. Gordon Silver Paul C. Valentine, Esq.
Alan R. Watts, Esq.
Richard J. Wharton, Esq.
Harry N. Willis John F. Wolf, Esq Atomic Safety and Licensing Board Panel Atomic Safety and Licensing Appeal Panel Docketing and Service Section Document Management Branch ACRS Members Dr. Robert C. Axtmann Nr. Nyer Bender Dr. Nax W. Carbon Nr. Jesse C. Ebersole Mr. Harold Etherington Dr. William Kerr Dr. Harold W. Lewis Dr. J.
Carson Mark Nr. William M. Mathis Dr. Dade W. Noeller Dr. David Okrent Dr. Milton S. Plesset Mr. Jeremiah J.
Ray Dr. Paul C.
Shewmon Dr. Chester P. Siess Nr. David A. Ward
I I