ML11305A074: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
(Created page by program invented by StriderTol)
 
(4 intermediate revisions by the same user not shown)
Line 1: Line 1:
{{Adams
#REDIRECT [[L-07-001, Clarification of Information Provided in Response to NRC Generic Letter 2007-01, Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients]]
| number = ML11305A074
| issue date = 10/21/2011
| title = Nine Mile Point, Units 1 and 2, Clarification of Information Provided in Response to NRC Generic Letter 2007-01, Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients
| author name = Gellrich G
| author affiliation = Constellation Energy Nuclear Group, LLC, EDF Development, Inc, Nine Mile Point Nuclear Station, LLC
| addressee name =
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000220, 05000410
| license number = DPR-063, DPR-069
| contact person =
| case reference number = GL-07-001, TAC MD4308, TAC MD4309, TAC MD4331, TAC MD4350
| document type = Letter
| page count = 3
| project = TAC:MD4309, TAC:MD4350, TAC:MD4331, TAC:MD4308
| stage = Other
}}
 
=Text=
{{#Wiki_filter:George Gellrich P.O. Box 63Vice President-Nine Mile Point Lycoming, New York 13093315.349.5200315.349.1321 FaxCENOSMa joint venture ofConstellation 6'=eDFEnergy*NINE MILE POINTNUCLEAR STATIONOctober 21, 2011U.S. Nuclear Regulatory CommissionWashington, DC 20555-0001ATTENTION: Document Control Desk
 
==SUBJECT:==
Nine Mile Point Nuclear StationUnit Nos. 1 and 2; Docket Nos. 50-220 and 50-4 10Clarification of Information Provided in Response to NRC Generic Letter 2007-01,Inaccessible or Underground Power Cable Failures that Disable Accident MitigationSystems or Cause Plant Transients
 
==REFERENCES:==
(a) Letter from J. M. Heffley (CEG) to Document Control Desk (NRC), datedMay 7, 2007, 90-Day Response to Generic Letter 2007-01(b) Letter from M. G. Kowal (NRC) to H. B. Barron (CENG), dated October 23,2008, Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2; Nine Mile PointNuclear Station, Unit Nos. 1 and 2; R.E. Ginna Nuclear Power Plant -Closeoutof Generic Letter 2007-01, "Inaccessible or Underground Power Cable Failuresthat Disable Accident Mitigation Systems or Cause Plant Transients" (TAC Nos.MD4308, MD4309, MD4349, MD4350, and MD4331)This letter clarifies certain information that was provided in the Constellation Energy response to NRCGeneric Letter (GL) 2007-01 as it pertains to Nine Mile Point Nuclear Station.By letter dated May 7, 2007 (Reference a), Constellation Energy submitted the 90-day response to GL2007-01. The second request in the GL was to submit the following information:"Describe inspection, testing and monitoring programs to detect the degradation of inaccessibleor underground power cables that support EDGs, offsite power, ESW, service water, componentcooling water and other systems that are within the scope of 1O CFR 50.65 (the MaintenanceRule)."
Document Control DeskOctober 21, 2011Page 2The response for Nine Mile Point Nuclear Station (NMPNS) in Reference (a) stated the following:"Manholes are inspected approximately every six months for water and, if water is found, it isremoved. This preventive maintenance inspection routine was established to reduce the likelihoodthat underground power cables are exposed to a water environment or to reduce the length ofexposure to water. Also, some manholes have installed sump pumps. These preventive measuresdo not detect degradation of inaccessible or underground power cables but they assist ineliminating or reducing the likelihood that these cables are subjected to a wet environment.Since there is no history of failure and the exposure to moisture is reduced by routine pumping ofmanholes, NMPNS has not established inspection, testing, and monitoring programs specificallyto detect degradation of inaccessible or underground power cables that are within the scope of 10CFR 50.65 (the Maintenance Rule). However, some inaccessible and underground power cablesthat are within the scope of 10 CFR 50.65 are tested to ground with a meggar as part of theassociated motor's routine maintenance."The NRC documented the results of its review of the Constellation Energy response to GL 2007-01 byletter dated October 23, 2008 (Reference b).As a result of discussions conducted during the most recent Component Design Basis Inspection (CDBI),NMPNS has determined that the above response needs to be clarified, for the following reasons:* Only Nine Mile Point Unit 2 (NMP2) has manholes containing power cables that are within the scopeof the GL. Nine Mile Point Unit 1 (NMP1) does not have any such manholes." While some NMP2 manholes do have installed sump pumps, the NMP2 manholes containing in-scope power cables do not have installed sump pumps.Based on the above, NMPNS hereby clarifies the response to GL 2007-01 for NMP1 and NMP2 to statethe following:"Nine Mile Point Unit 2 (NMP2) manholes containing power cables within the scope of GL2007-01 are inspected approximately every six months for water and, if water is found, it isremoved. This preventive maintenance inspection routine was established to reduce the likelihoodthat underground power cables are exposed to a water environment or to reduce the length ofexposure to water. These preventive measures do not detect degradation of inaccessible orunderground power cables but they assist in eliminating or reducing the likelihood that thesecables are subjected to a wet environment. Nine Mile Point Unit 1 (NMP1) does not have anymanholes containing power cables that are within the scope of GL 2007-01.Since there is no history of failure and, for NMP2, the exposure to moisture is reduced by routinepumping of manholes, NMPNS has not established inspection, testing, and monitoring programsspecifically to detect degradation of inaccessible or underground power cables that are within thescope of 10 CFR 50.65 (the Maintenance Rule). However, some inaccessible and undergroundpower cables that are within the scope of 10 CFR 50.65 are tested to ground with a meggar as partof the associated motor's routine maintenance."
Document Control DeskOctober 21, 2011Page 3This letter does not contain any regulatory commitments. Should you have any questions regarding theinformation in this letter, please contact John J. Dosa, Director Licensing, at (315) 349-5219.Very truly yours,STATE OF NEW YORKTO WIT:COUNTY OF OSWEGOI, George Gellrich, being duly sworn, state that I am Vice President-Nine Mile Point, and that I am dulyauthorized to execute and file this revised response on behalf of Nine Mile Point Nuclear Station, LLC.To the best of my knowledge and belief, the statements contained in this document are true and correct.To the extent that these statements are not based on my personal knowledge, they are based uponinformation provided by other Nine Mile Point employees and/or consultants. Such information has beenreviewed in accordance with company practice and I believe it to be reliable.Subscribed and sworn before me, a Notary Public in and for the State of New York and County ofnm, this 01- day of (. 2011.WITNESS my Hand and Notarial Seal: AOo,.. i,/ iA.)Notary PublicMy Commission Expires:9//,/J~I anbeKLDoranDate "Ooftft lose s of Nw%*GG/DEV My o W12=O*cc: Regional Administrator, Region I, NRCProject Manager, NRCResident Inspector, NRCA. L. Peterson, NYSERDA
}}

Latest revision as of 16:54, 12 April 2019

Redirect to:

Retrieved from "https://kanterella.com/w/index.php?title=ML11305A074&oldid=1451616"