PNO-I-80-024, on 800210,facility Lost Incoming 345 Kv Transmission Line.Caused by External Power Sys Problems.Core Defueled & Spent Fuel Pool Temp Remained Relatively Constant During Event

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PNO-I-80-024:on 800210,facility Lost Incoming 345 Kv Transmission Line.Caused by External Power Sys Problems.Core Defueled & Spent Fuel Pool Temp Remained Relatively Constant During Event
ML20126B728
Person / Time
Site: Pilgrim
Issue date: 02/11/1980
From: Brunner E, Kehoe D, Martin T
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
References
PNO-I-80-024, PNO-I-80-24, NUDOCS 8003190442
Download: ML20126B728 (1)


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D - 5 E ~ M: [ .}s-{5~ $ } % ,y lp N - % [' .{~ Date{~februsry 11, 1980 I

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Y. PRELIMIhAUNOTIFIC

                                   -+ _.= .:-           b5N OF  . .SYENT
                                                                    =-        OfUNUSUAL               OCCURRENCE -P
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9= - - -v This preliminar/ notification constitutes EARLY notice of events of POSSIBLE 2 shfety _or cablic interest. 51cnificance. Thi ~infor::ation cresented is as initially receivec without verification or evaluation ano 1s casically all that is known ~~ by IE staff on tnis cate. ' Facility: Bastan Edison Co.7any Pil.qrim, Unit 1 (DN W293) Plyr.culh. Massachusetts subjec9 1.055 0F DFF5ITE POWER At 3:34 PM, February 10, 1980, Pilgrirn Nuclear Power Station lost its incoming 345 KV transmission line, due 4 Boston Edison Cccany power system prob 1 cms external to the plant. At the time power was lost, the backup offsite power line and one of two

          .s tation cier.e.1r. were riown for preplanne.d maintenanc.e. Vital loads were picked up by the recaining dieset aref a transfor.er link with normal power to Plymouth, Masser.;huse.

Normal offsita power wa2 finally re.storad at 7:00 PM. The core was defucled and spent fuel prial te.r;:arature recained relatively constant during the event. Madia intarsst is possibla because of sensitivity to nuclear powcr issues. The Cm:nonvaalin of Massach:.:setts has been infor ed. Neither the licensee nor the NRC plan to issue a prass ralease at this time. NRC, Reginn I (Philadel;hia) received initial notification of this uccurrene,e from the Hucdquarters Duty Officar at 6:30 PH, February 10, 1900. This PN 1s issued for infar=ation anTy, Centact: 0 Kutne ass-1275 T. Martin 463-1235 E. Brunner 488-1No 015TRIBUTICH: (Fac5r.ile Transmission Times Noted) H ST BLDG HARYLANO MATIONAL I!: X005 Chairman Ahaarne BANX EUILDING _ __ NRC/TMI Tecnnical Cocnissiener Xeaned/ W. J. Di rcks , E00 Support Office Comissioner Gilinsi:y C. Michelson, AE00 - Comissione.- Eradford J. J. Fouchard, PA Region II Co.missioner Hendrie ' N. M. Haller, MPA Region III ACR5 .

                                     .~            R. G. Ryan, OSP                              Region IV
5. J. Chilk, SECY H. K. Shapar, ELD Region V C. C. KL_earer, CA '

(for Distribution) WILLSTE BLOG _ _ RI Resident Sites J. G. Davis, M55 / PHI!. LIPS SLDG S. Levin, RES __ _ / H. R. Dentca, hKR R. C. DeYoung, HRR LANDOW BLDG (Fax by HO) (MAIL) R. J. Mattsen. NRR (6 HIN/PAGE) R. Minogue, SD O. Vassa11c, NPJt J. J. Cu::nings, CIA IE:X005 D. Eisenhut, NRR , PRcLIMINARY hoidlCAll0N Region I Form 83 (Rev. February 1980) . 8003190 y h

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