ML19322C519
| ML19322C519 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/21/1979 |
| From: | Thadani A Office of Nuclear Reactor Regulation |
| To: | Heltemes J Office of Nuclear Reactor Regulation |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8001170848 | |
| Download: ML19322C519 (2) | |
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UNITED STATES P
NUCLE A R REGULATORY COMMISSION j
y
,g WASHINGTON, D. C. 20555
, gjg'211979 v
m NOTE T :
J. Heltemes FROM:
A. Thadani
SUBJECT:
STUCK OPEN PORV.AT FOREIGN REACTOR
Reference:
Memo from R. DeYoung to H. Denton, "Procursor Event In a Foreign Reactor," 7/24/79 In response to your request for my coments and responses to the above referenced DeYoung memo, the following are my views on the first two items in the DeYoung memo:
Item 1:
a) At a meeting with Westinghouse on April 26, 1979, in response to my questioning, Westinghouse (W) stated that a foreign reactor designed by W_ had experienced a stuck open PORY event.-
b.
After determining the country where the event had occurred, H. Faulkner of International Programs, S. Newberry of RSB and I discussed (tele con -
5/15/79) this event with the officials of that country to better understand the scenario and any other pertinent information we could gather.
The event discussion was provided to us on a confidential basis, c.
Imediately afterwards (5/15/79) I issued a memo to D. F. Ross in which I explained the sequence of events and noted the potentially serious deficiency in the W designed plant's ECCS actuation logic and emphasized the need to assure that recommendations of Bulletins 79-06 and 79-06A as they pertain to this issue were vigorously followed and implemented.
This memorandum, copics.of which were sent to E. Case, R. Mattson, R. Tedesco, T. Novak, H. Faulkner, and S. Newberry was given classification, " Confidential,"
by J. D. Lafleur.
d.
On 5/15/79, I believe, I also verbally described the event to R. Mattson and E. Case (D. Ross was on travel).
e.
Subsequently I had several discussions of this event with D. F. Ross i
H. Faulkner.
f.
Subsequently, in response to our (H. Faulkner and A. Thadani) request, a proprietary t' chnical report on the event.was sent to NRC and distributed e
by P. O'Reilly in a memorandum dated June 4,1979.. Copies of the report were also given to the ACRS.
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During wid-June, I requested H. Faulkner to obtain copies of c;pndices referenced in the proprietary technical report.
h.
During this period (can't remember the date) D. Ross and I talked to T. Anderson of W to determine if they (W) had seen the report, and T.
Anderson indicated that they had indeed seen a_ report on the incident.
- i. On 6/26/79, an unclassified paragraph summarizing the event only was sent to H. Faulkner by the officials of the country involved and H. Faulkner transmitte,d the infonnation to me on 6/28/79.
- j. During this period, and subsequently, I discussed this event and its implications with F. Hebdon of the "TMI Special Inquiry Croup."
Item 2:
The safety signficance of this event is that for a number of years the W designed plants continued operation with a design deficiency in the ECCF actuation logic. This deficiency had been corrected as a result of NRC Bulletins 79-06 and 79-06A, resulting from the TMI-2 evaluations, issued on April 11, 1979 and April 13,'1979, respectively.
l Ashok C. Thadani Reactor Systems Branch cc:
E. Case-R. Mattson D. Ross s
T. Novak T. Speis H. Faulkner l
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