ML20091P969: Difference between revisions

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#REDIRECT [[A09703, Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0165 Complete.Comments Encl]]
| number = ML20091P969
| issue date = 09/09/1991
| title = Informs That Review of Issues Re Employee Concerns for Allegation RI-91-A-0165 Complete.Comments Encl
| author name = Mroczka E
| author affiliation = NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
| addressee name = Hehl C
| addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
| docket = 05000336
| license number =
| contact person =
| document report number = A09703, A9703, NUDOCS 9202040107
| package number = ML20091P903
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE
| page count = 3
}}
 
=Text=
{{#Wiki_filter:.. __      _
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}}

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