ML20150E682
| ML20150E682 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/24/1988 |
| From: | Bettenhausen L NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Mroczka E NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| IEB-85-003, IEB-85-3, NUDOCS 8804040011 | |
| Download: ML20150E682 (3) | |
Text
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14AR 14 W Docket No. 50-423 Northeast Nuclear Energy Company ATTN: Mr. E. J. Mroczka Senior Vice President - Nuclear Engineering and Operations Group P. O. Box 270 Hartford, Connecticut 06141-C270 Gentlemen:
Subject:
Request for Additional Information Regarding Response to IEB 85-03 for Millstone Unit 3 This transmits an identification of the addit:onal information needed by the NRC to evaluate valve operability considerations in accordance with IEB 85-03, "Motor-Operated Valve Common Mode Failures During Plant Transients Due to Imprcper Switch Settings.
To facilitate NRC review, we are requesting that you supplement your June 11 and October 28, 1986 responses to IEB 85-03 with the information identified in the enclosure to this letter.
Please make that submittal within sixty (60) days of the date of this letter, as agreed to by Mr. E. P. Perkins of your staf f on March 22, 1988.
Your submittal should be made to the NRC Document Control Desk, with copies to this office and the NRR Division of Operational Events Assessment.
Thank you for your cooperation.
Sincerely, Orlstaal Signed Pyi Lc,e if. Bettenhaasea Lee H. Bettenhausen, Chief Projects Branch No. 1 Divisicn of Reactor Projects l
Enclosure:
Request for Additional Information
Contact:
R. J. Kiessel, NRR (301) 492-1154 C.! f I l
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i 0FFICIAL RECORD COPY 33/ CONNER /3/22/88 - 0001.0.0 03/22/88 8804040011 800324 PDR ADOCK 05000423 TC3 -
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7 MAR 2 41988 Northeast Nuclear Energy Company 2
cc w/ enc 1:
W. D. Romberg, Vice President, Nuclear Operations D. O. Nordquist, Manager of Quality Assurance R. M. Kacich, Manager, Generation Facilities Licensing S. E. Scace, Statioi Superintendent PublIc Document Roon (PDR)
Local Public Docume it Room (LPDR)
Nuclear Safety Info mation Center (NSIC)
NRC Senior Resident Inspector State of Connecticut bec w/ encl:
Region I Docket Room (with concurrences)
Management Assistant, DRPA (w/o encl)
DRP Section Chief S. Pindale, RI, Beaver Valley R. Ferguson, LPM, NRR R. Bores, DRSS S. Barber, RI R. Kiessel, NRR E. Conner, RI RI:DRP RI:DRP RI:DRP R):pfiP i
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OFFICIAL RECORD COPY 33/ CONNER /3/22/88 - 0002.0.0 03/22/88 l
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ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION REGARDING REVIEW 0F RESPONSES TO IF BULLETIN 35-03 In regard to your response to IE Bulletin 85-03, additional information was found to be needed.
Please provide information to resolve the following comments and questions:
1.
Has water hammer due to valve closure been considered in the determination of pressure differentials?
If not, explain.
2.
Unlisted MOVs 17A, 17B, and 170 are shown normally open ta zones F-2, H-2, and C-2, respectively, of Figure 10.3-1, Sheet 1 of 5, Amendment 18, March 1986.
They are located in the steam lines from the staam generators to the AFW Turbine, in series with normally closed pneumatic valves. As required by Action Item a of the bulletin, assume inadvertent equipment operations.
How would steam flow to the AFW turbine be ensured if these MOVs were to be left closed inadvertently? Revise Attachment 4 of the response of 10/28/86 to include these MOVs, or justify their exclusion.
3.
The proposed program for Action Items b, c, and d of the bulletin is ir.com-plete.
Provide the following details as a minimum:
(a) commitment to a training program for setting switches and maintaining valve operators, (b) commitment to justify continued operation of a valve determined to be inoperable, (c) description of a method possibly needed to extrapolate valve stem thrust dete-mined by testing at less than maximum differential pressure.
(d) justification of a possible alternative to testing at maximum differen-tial pressure at the plant, and (e) consideration of applicable industry recommendations in the preparation of procedures to ensure maintenance of switch settings.
OFFICIAL RECORD COPY 33/ CONNER /3/22/88 - 0003.0.0 03/22/88 l