A09698, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0162 Complete.Comments Encl

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Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0162 Complete.Comments Encl
ML20091P953
Person / Time
Site: Millstone Dominion icon.png
Issue date: 09/09/1991
From: Mroczka E
NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To: Hehl C
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20091P903 List:
References
A09698, A9698, NUDOCS 9202040102
Download: ML20091P953 (3)
v • d • e


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'"', HARTFORD. CONNECTICUT 001410270 J .e w e, s.uw (?O3) M54o00 Septemb1r 9, 1991 Docket No. 50-336 A09698 RE: Employee Concerns Mr. Charles V. Behl, Director Division of Reactor Projects U. S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, Pennsylvania 19406 Dear Mr. Behlt Millstone Nuclear Power Station, Unit No. 2 RI-91-A-0162 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 NRC letter and our response have received controlled and limited distribution on a "need.to know" basis during the preparation of this response. Additional time to respond to this issue was granted by the Staff in telephone conversations on August 12 and August 30, 1991.

ISSUE:

'An uncalibrated and unlabeled manometer .has been temporarily attached (using cable ties) to the Hillstone Unit 2 Exhaust Ventilation Duct for approximately 2 years. During this time, no action to either remove the tonometer or to have it calibrated and permanently installed has been taken.

9202040102 911106 PDR ADOCK 05000336 p PDR

- Mr. Charles V. B-hl, Dirceter U. S. Nuclear Regulatory Coaatssion A09698/Page 2

    • September 9, 1991 Request Please discuss the validity of the above assertion. If deficiencies are found in cocponent installatinn or calibration, please notify us of the corrective actions taken to prevent recurrence. If the condition is found not to be deficient, please notify why it is not. Please provide us with an assessment of the significance with regard to safety of any identified deficiencies.

Background:

The subject manometer was found connected in parallel with flov switch FS-8328, which is associated with the Hillstone Unit No. 2 containment exhaust fan F34B. The nanometer vas installed at the existing instrument test tees to monitor the flov switch differential pressure, as the flov switch vas experiencing intermittent trouble at the time. Records shov that technicians toutinely refilled and checked the manometer during periodic maintenance on FS-8328.

Response

The assertion as stated is valid, however, when the manometer was installed, no formal administrative documentation requirement existed for such " temporary" eechanical gauges used for testing or monitoring.

Currently, an Automated Vork Order (AVO) vould be used to install and remo-e the device during any testing activity. Additionslly, the requirements of ACP-0A-2.06B, " Station Bypass / Jumper Control," may be invoked if deemed necessary by management or the Shift Supervisor if the gauge vere needed on a longer term basis.

The fan (F34B) and the flov switch (FS-8328) are non-0A installations and failure of the fan or flov switch would not affect the operation of any safety system. The installation of the manometer had no effect on the safe operation of the system or the plant and its calibration status had no bearing on the functioning of FS-8328. Nylon cable ties are commonly used for the mounting of temporary monitoring instruments on non-0A equipment and are considered adequate for this installation. Therefore, there is no safety significance.

A review of Production Maintenance Management System (PMMS) history indicates that the device is no longer required. The manometer has been removed under AVO H2-91-08081 and the test tee fittings capped.

After our reviev 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 that the installation of this temporary device vas of concern to I

1

1Mr. Charlos_V.;B:bl,-Director . l

- U. - S. Nuclear Regulatory Commission H

1. A09698/Page 3 -I September 9, 1991 anyone prior to receipt of your letter. .\s indicated in our response, the-device vas removed after determining (nat it .vas no longer Ve appreciate the opportunity to respond and explain theour basis of ,needed.

action.

Please contact my statt if there are further questions on this matter.

Very truly yours, 1 NOP.THEAST NUCLE Q ENERGY COMPANY E. Ji/Mroczka C/

Senior Vice President J. Raymond. Senior Resident Inspector, Millstone Unit Nos. 1, 2,

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E.- C. Vanzinger, Chief, Projects Branch No. ,, Division of Reactor Projects E. M. Kelly, Chief, Reactor Projects Section 4A J. T. Shedlosky, NRC, Millstone Nuclear Power Station i

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