A09703, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0165 Complete.Comments Encl

From kanterella
(Redirected from A09703)
Jump to navigation Jump to search
Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0165 Complete.Comments Encl
ML20091P969
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
A09703, A9703, NUDOCS 9202040107
Download: ML20091P969 (3)
v • d • e


Text

.. __ _

NORTHEAST UTil.lTIES O.n.,.i Oii.c.. . s.io.n si, i. e.,i n. Conn.a co, 9 N'I'I$U'I'N""~"

P O BOX 270 1*,,**1',,*7,,% L HARTFORD. CONNECTICUT 061414270 k k J w # u.. . , ,,,, (?O31 665-5000 September 9, 1991 Docket No. 50-336 A09703 RE: Employee Concerns Mr. Charles V. Hehl, Director Division of Reactor Projects U. S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, Pennsylvania 19406 Dear Mr. Behlt H111 stone Nuclear Power Station, Unit No. 2 RI-91-A-0165 As requested in ,our transmittal letter, our response does not contain any personal privacy, proprietary, or' safeguards inforention. 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 these issues was granted by the Staff in telephone conversations '

on August 12 and August 30, 1991.

ISSUE 1:

Twenty of' the twenty-four valves and regulators within the cryogenic Liquid Nitrogen Converter Package (B-43) are not labeled.

Request:

Please discuss the validity of the above assettions. If deficiencies are found in Station drawings and/or equipment identification tagging, 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.

Response

This issue is valid. Many of the component tags have deteriorated or been lost due to years of unprotected exposure to the elements.

9202040107 911106 PDR ADOCK 05000336 P PDR

Hr. Charlos V. H bl, Director U. S. Nuclear Rogulatory Co: mission A09703/Page 2 September 9, 1991 This condition was previously brought to the attention of Hillstone Unit No. 2 Hanagement and was under investigation at the time the allegation was received. All component tags have been reviewed by Hillstone ' Unit No. 2 Operations personnel and the Liquid Nitrogen Converter Package has been givea a priority rating for tag replacement utilizing the new enhanced

'4gging system. A valk-dovn of the Cryogenic Liquid Nitrogen Converter Package (H-43) was performed by Hillstone Unit No. 2 Engineering and verified against the most current revision of P&ID 25203-26033, N2, H2, and CO2 System. The P&ID vas found to be accurate and to reflect the plant as-built configurr. tion and it vill be the basis for the valve tag replacement efforts.

The Cryogenic Liquid Nitrogen Converter Package is a low use system and as such there vas no safety significance involved. If a label or labels are discovered missing, the appropriate P&ID and a knowledgeable operator are used to provide identification.

ISSUE 2:

An evacuation pump appears to be permanently connected to the Cryogenic Liquid Nitrogen Converter system, but is not depicted on Station Drawing 25203-26033, Location F6, 7, and 8.

Request:

Please discuss the validity of the above assertions. If def!ciencies are found in Station drawings and/or equipment identification tagging, please notify us of the corrective actions you have taker. to prevent recurrence.

Please provide us with an assessment of the significance with regard to safety of any identified deficiencies.

Response

An evacuation pump has been mounted to the system via the designated N evacuation flange / union connection. Thepumpisusedonanasneededbasik and is disconnected when not in use. The pump evacuates the annulus portion between the inner Cryogenic vessel and the outer vessel vhich is exposed to ambient conditions. The annulus portion between the two vessels is filled with an insulation material and is maintained at a high vacuum to reduce heat loss. The pump is used to periodically evacuate the space, but does not interconnec* vith the plant N 2 system. No changes to the P&ID's are considered necessary nor varranted. This condition was previously brought to the attention of Northeast Nuclear Energy Company (NNECO) management and was under investigation at the time the allegation vas received.

Hr. Charlos V. Bahl, Director U. S. Nuclear Reguletory Coamission

, A09703/Page 3 September 9, 1991 After our reviev and evaluation of these issues, ve find that this issue did not present any indication of a compromise of nuclear safety. Perhaps the concern expressed was based on a lack of avareness of the action taken to address the previously identified problem. Ve appreciate the opportunity to respond and explain the basis of our action. Please contact my staff if there are further questions on these matters.

Very t ruly - surs, NORTHEAST NUCLEAR ENERGY COMPANY f NfW E.J.poczka (/

Senior Vice President cc V. J. Raymond, Senior Resident Inspector, Hillstone Unit Nos. 1, 2, ard 3 E. C. Venzinger, Chief, Projects Branch No. 4, Division of Reactor Projects E. H. Kelly, Chief, Reactor Projects Section 4A J. T. Shedlosky, NRC, Hillstone Nuclear Power Station i

l 3

Retrieved from "https://kanterella.com/w/index.php?title=A09703,_Informs_That_Review_of_Issues_Re_Employee_Concerns_for_Allegation_RI-91-A-0165_Complete.Comments_Encl&oldid=3492957"