ML20036B309
| ML20036B309 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 04/12/1991 |
| From: | Charlotte White NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Hehl C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20036A053 | List:
|
| References | |
| FOIA-92-162 NUDOCS 9305190082 | |
| Download: ML20036B309 (5) | |
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CFFICli OF INVESTIGATIONS FIELD OFFICE, REGION I p
478 ALLENDALE ROAD h
KING OF PRUS$tA, PENNSYLVANIA 19404 h
l April 12,1991 MEMORANDUM FOR: Charles W. Hehl, Director i
Division of Reactor Projects, Region 1 FROM:
Chester W. White, Directo l
Office of Investigations Field Office, Region I 4
i
SUBJECT:
ALLEGED FAILURE TO REPORT A SAFETY SYSTEM RELATED PROBLEM During the course of an interview of an Northeast Utility employee by the Office of Investigations (01), the following information was provided concerning NU's compliance with General Design Criteria (GDC) No.17 at Millstone Unit 2 The Source stated that he/she received second hand informa on from that he was concerned about a pro em related to o site p'ower to the Reserve. tation Service Transformer (RSST) that has to do with set point calibration involving voltage.
concerns, according to the Source, are as foliows:
1 i
believes that j
.if NU would have addressed his questions co ning GDC No 17, his j
concern would possibly go away. However, if NU was not in compliance, j
the matter should have already been resolved by management.
If there j
is/was a problem, and it has not or is not being addressed, is concerned that he should have made an official report on the matter at the time it surfaced.
l t at e ssue <
aproblemandthatj doesn t know what he is 1 king about.
(Source said it may just be a matter of a DPO.)
j The Source statedi ha NRC m aware of the is u through j
is supervised y _
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j The Source furthe stated that since LRS con ta o er contcattors t and requested i
t at they look
. s proble he law nn may ave been the firm i
of Winston and S awn who are enti NU in the current 01 l
investigations.)
has not received a
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response to his 1 er.
OI has no further infonnation on this matter, and is providing it to you for j
any action you deem appropriate.
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NRC Region I form 207 (Revised 10/89)
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g NUCLEAR REGULATORY COMMISSION l
REGION l p
475 ALLENDALE ROAD
%, * * " *,g' KING OF PRUS$tA. PENNSYLVANIA 1940tLl415 Jill 30t331
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MEMORANDUM FOR:
Chester W. White, Field Office Director Office of Investigations FROM:
Charles W. Hehl, Director Division of Reactor Frojects
SUBJECT:
NOTIFICATION REGARDING ALLEGATIONS RI-91-A-0091, RL91-A-OlM, AND RI-91-A 0029 l
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t Charles W. Hehl, Director Division of Reactor Projects
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E. Wenzinger l
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J. Stewart Files RI-91-A-0091 RI-91-A-0134 RI-91-A-0029 1
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MEMORANDUM FOR:
Jose Calvo, Assistant Director for Region I Reactors Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation FROM:
Charles W. Nehl, Director Division of Reactor Projects Region I
SUBJECT:
PROPOSED TASK INTERFACE REGARDING 1
l COMPLIANCE OF MILLSTONE UNIT 2 WITH GENERAL DESIGN CRITERION 17 f
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Your assistance is requested in resolving a conc..
originally identified by an SSFI conducted by the licensee approximately two years ago and subsequently classified as an allegation by the NRC.
The technical concern involves the compliance of Millstone Unit 2 with General Design Criterion Number 17; specifically, a scenario (t
wherein a single fault on an onsite bus and eventual loss of the Reserve Station Service Transformer (RSST) could cause the sisultaneous disruption of power to both Unit 2 redundant 4ky class 1E divisions.
Our preliminary assessment has identified two issues:
one involving a protective relaying question of breaker coordination; and, the other a licensing question regarding GDC17 acceptability.
The implications -- if true --
are of such significance that an independent assessment by the NRC is warranted.
Enclosed is an internal Northeast Utilities document dated May 2, 1991, containing an independent, third-party analysis of GDC-17 compliance for Millstone Unit 2.
We would appreciate your prompt attention to this matter and a prelisinary assessment by July 1991 so that, if a significant weakness is identified, action can be taken to ensure that the station can mitigate the effects of a blackout.
The Region I point of contact is Edward Wensinger, Chief, Reactor Projects Branch 4 (FTS 346-5225).
This TIA proposal has been discussed with John Stols of NRR.
W' L
Char s W. Heb J Directok Division of Reactor Projects
Enclosure:
As stated no330 JFO i
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l NUCLEAR REGULATORY COMMISSION l
.I REGloN I 47s ALLENDALE ROAD i
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oNo or Prussia. rtNNsYLVANIA 1W41s OCT 2 41991 i
Dear 1
j Per your October 10, 1991 request, enclosed is a listing of concems that you have provided to
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the NRC which are currently open according to our records. For your information, we have l
broken down each allegation into individual concerns, and there are 86 concerns that remain open. The 21 concerns which are prececed by an asterisk are considered technically closed with j
the appropriate paperwork in process. You will be receiving closecut letters for those concerns, i
commensurate with their prionty and our other work activities.
i The enclosed listing provides the date of receipt of your concerns, and a brief summary. Your i
records should enable cross-reference between our case file numbers and related correspondence that you hase receised. Regarding any ot' r allegations you have made, according to our files.
those are closed with no further action planned by the NRC. I trust this meets your needs. I may be contac:ed at (215) 337-5225 if you have any further questions.
J Sincere!y.
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ff Edward Wenzinger, Chi l
Reactor Projects Branc 4 j
Enclosure:
As stated i
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OCT 2 41991
Dear Per your October 10. 1991 request,
enclosed is a listing of concerns that you have provided to i
the NRC which are currently open according to our records. For your information, we have broken down er.h allegation into individual concerns. and there are 86 concerns that remain open. The 21 concerns which are preceded by an asterisk are considered technically closed with the appropriate paperwork in process. You will be receiving closecut letters for those concerns, commensura'e with their priority and our other work activities.
I The enclosed listing provides the date of receipt of your concerns, and a brief summary. Your records should enable cross reference between our case file numbers and related correspondence that you base received. Regarding any od allegations you have made, according to our files.
those are closed with no further action planned by the NRC. I trust this meets your needs. I may be contacted at (215) 337-555 if you have any funher questions.
Sir cere!
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Edward Wenzinger, Chic Reactor Frojects Branc 4 j
Enclosure:
As stated
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g " * * *,j-OCT 2 41991 Dear l
Per your October 10, 1991 request, enclosed is a listing of concerns that you have provided to the NRC which are curTently open according to our records. For your information, we have broken down each allegation into indivicual concerns, and there are 86 concerns that remain open. The 21 concerns whi:h are preceded by an astensk are considered technically closed with the appropnate paperwork :n prceess. You will be receiving closcout letters for those concerns, i
commensurate with their pnonty and our other work activities.
I Te enclosed listing prosides the date of rt Spt of your concerns, and a brief summary. Your records should enable cross-reference between our case file numbers and related correspondence i
that sou base receised. Regarding any ot' allegations you have made, according to our files.
I ttce, re closed with no funher action planned by the NRC. I trust this meets your needs. I may c.e contacted at C15) 337-52:5 if you hase any funher questions.
Sincerely.
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Edward Wenzinger, Ch'ie' Reactor Projects Branc 4 l
Enclosure:
As stated
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l Per your October 10.1991 request, enclosed is a listing of concerns that you have provided to the NRC which are currently open according to our records. For your information, we have broken down each allegation into individual concerns. and there are 86 concerr.s that remain open. The 21 concerns which are preceded by an asterisk are considered technically closed with 4
j the appropnate paperwork in process. You will be receiving closcout letters for those concerns, j
commensurate with tneir priority and our other work activities.
4 i
The enclosed listing provides the date of receipt of your concerns, and a brief summary. Your I
records should enable cross reference between our case file numbers and related correspondence j
that you hase receised. Regarding any ot" allegations you have made, according to our files.
l those are closed with no funher action planned by the NRC. I trust this meets your needs. I j
may be contacted at (215) 337-5225 if you have any funher questions.
i i
Sincere!y.
)
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/f Edward Wenzinger, Chie Remor Projects Branc 4 i
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Enclosure:
As stated l
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