ML20195E873
| ML20195E873 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 05/30/1986 |
| From: | Kuncl L NEBRASKA PUBLIC POWER DISTRICT |
| To: | Martin R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| CNSS-867438, IEB-86-001, IEB-86-1, IEB-86-4, NUDOCS 8606090257 | |
| Download: ML20195E873 (2) | |
Text
~'
"75fb$S[ffbe$let**"""
j Nebraska Public Power District
~
CNSS867438
!6 :
May 30,1986 JUN - 21966 Mr. Robert D. Martin Regional Administrator U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011
Subject:
Response to IE Bulletin No. 86-01 Cooper Nuclear Station NRC Docket No. 50-298, DPR-46
Reference:
1.
IE Compliance Bulletin No. 86-01, " Minimum Flow Logic Problems That Could Disable RIltt' Pumps".
Dear Mr. Martin:
Purst:ent to the requirements of Reference 1, Nebraska Public Power District (NPPD) is submitting the following response.
An immed! ate review was conducted in response to IEB 86-01.
This review, along with discussions with General Electric, determined that Cooper Nuclear Station does not have the single failure vulnerability described in Reference 1.
The circuitry at Cooper includes a relay contact which isolates and provides independence for the minimum flow circuitry of the two RIIR' loops.
The circuitry for this isolating relay has been field verified and/or functionally tested.
General Electric has issued a letter to the District confirming that the Cooper RHR' minimum flow bypass valve logic is single failure proof due to this isolating contact.
If you have any questions regarding this submittal, please contact my office.
4 L. G.
unci Vice President j
g tS M Nuclear Power Group
/(
gy LGK:RWF:lk30/3 I g
$$d2. FIN 88 cc: Document Control Desk U.S. Nuclear Regulatory Commission g609025786053o ADOCK 05000298 o
~W' Mr. Rob:rt D. Martin Paga 2 May 30,1986 STATE OF NERR ASKA)
)ss PLATTE COUNTY
)
L. G. Kuncl, being first duly sworn, deposes and says that he Is an authorized representative of the Nebraska Public Power District, a public corporation and political subdivision of the State of Nebraska; that he is duly authorized to submit this request on behalf of Nebraska Public Power District; and that the statements contained herein are true to the best of his knowledge and belief.
.f q
L.fi. Kuncl SubscribedJ my presence and sworn to before me this N. day of
'//fyn
, 1986.
/ 3 CAo1n Mk NOTARY fUBAIC seausammeamens C0t.LEEN BR. KUTA ElCasut BE Aug(1m
,