ML20091P974

Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0166 Complete.Comments Encl

ML20091P974
Person / Time
Site:	Millstone
Issue date:	09/13/1991
From:	Mroczka E NORTHEAST NUCLEAR ENERGY CO.
To:	Hehl C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20091P903	List: A09698, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0162 Complete.Comments Encl A09701, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0166 Complete.Comments Encl A09703, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0165 Complete.Comments Encl A09755, Informs That Review of Issues Re Employee Concerns for Allegations RI-91-A-0172 & RI-91-A-0173 Complete.Comments Encl A09768, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0079 Complete.Comments Encl A09803, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0183 Complete.Comments Encl A09805, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0070 Complete.Comments Encl A09806, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0171 Complete.Comments Encl A09807, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0170 Complete.Comments Encl A09819, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0163 Complete.Comments Encl A09829, Informs That Review of Issues Re Facility Activities for Allegation RI-91-A-0210 Complete.Comments Encl A09850, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0229 Complete.Comments Encl
References
A09701, A9701, NUDOCS 9202040108
Download: ML20091P974 (2)

Text

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i NORTHEAST UTILITIES o.n.,.i on.c.. . s.m.n sir i. a.,i,n, conn.ci.cui 1 .75$ SiNw

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p o Box 370 HARTFOn0. CONNECTICUT 06:4i0270 L L J U.U. CONE,"w",, (?O3) 6C&5o00 September 13, 1991 Docket No. 50-336 A09101 RE: Employee Concerns Mr. Charles V. Hehl, Director Division of Reactor Projects U. S. Nuclear Reguletory Commission Region I 4 475 Allendale Road King of Prussia, Pennsylvania 19406 Dear Mr. Hehl Millstone Nuclear Power Station, Unit No. 2 RI-91-A-0166 Ve have completed our reviev of the identified issue concerning activities at H.ilstene Station. As requested in your transmittal letter, our response does not contain any personal privacy, proprietary, or safeguards information. The material contained in this response may be released to the public and placed in the NRC Public Document Room at your discretion.

The Staff's transmittal letter and our response have received controlled _

and limited distribution on a "need to know" basis during the preparation of this response. Additional time in which to respond to this issue was granted by the Region I Staff in telephone conversations on August 12 and August 30, 1991.

ISSUE:

A level svitch (LS-9242) vithin the control circuit for the "B" Recovered

- Boric Acid Tank pump HP 92, was isolated with no plant documentation of it l:

being isolated.

Request:

Please discuss the validity of the above assertion. If deficiencies are found in vork control or valve alignments, please notify us of the corrective actions you have taken to prevent recurrence. Please provide us with an assessment of the significance with regard to safety of any identified deficiencies.

l 9202040108 911105 PDR ADOCK 05000336 PDR p

Mr. Chsrics V. H3hl, Directer

.% U. S. Nuclear Regulatory Commission

_, A09701/Page 2-September 13, 1991

Response

It is not possible to establish whether or not this assertion is valid.

Millstone Unit No. 2 Operations Department performs a weekly blovdown of miscellaneous tank level sensing lines in accordance with SP2654 - Periodic Checks. The "B" Recovered Boric Acid Storage Tank (RBAST) is included in this weekly surveillance. Therefore, the maximum period of time this switch could have been isolated is one veek. It is possible that it could have - been inadvertently left isolated during a veekly blevdown. There is no safety significance associated with such an isolation as RBAST tanks do not perform any safety related function.

Aftar our review and evaluation of this issue, ve find that this issue did not present any indication of a compromise of nuclear safety. Ve vere not avare of this issue prior to the receipt of the Staff's letter. Ve appreciat. the opportunity to respond and explain-the basis of our actions.

Please contact my staff if there are further questions on any of these matters.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY W e'

-/

E. J.g.roczka Senior Vice President cci V. J. Raymond, Senior Resident Inspector, Millstone Unit Nos. 1, 2, and 3 E. C. Venzinger, Chief, Projects Branch No. 4, Division of Reactor Proj ec t s --

E. - M. Kelly, Chief, Reactor Projects Section 4A J. T. Shedlosky, NRC, Millstone Nuclear Power Station

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