View source for PNO-II-80-150, on 801013,during Routine Check of Unit 2 Containment Purge Valve 5,purge Path Opened to Environ for 46 S.Caused by Failure to Follow Procedures in Proper Sequence.No Tech Spec Limits Exceeded.State of Sc Informed

{{Adams
| number = ML20204F118
| issue date = 10/14/1980
| title = PNO-II-80-150:on 801013,during Routine Check of Unit 2 Containment Purge Valve 5,purge Path Opened to Environ for 46 S.Caused by Failure to Follow Procedures in Proper Sequence.No Tech Spec Limits Exceeded.State of Sc Informed
| author name = Gibson A, Puckett J
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION II)
| addressee name = 
| addressee affiliation = 
| docket = 05000269, 05000270, 05000287
| license number = 
| contact person = 
| document report number = PNO-II-80-150, NUDOCS 8304280419
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
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MINARY NOTIFICATION        g October 14, 1980 FRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-II-80-150 This preliminary notifi m .,n constitutes EARLY natice of an event of POSSIBLE cr:fety or public interest significance. The information presented is as initially r::ceived without verification or evaluation and is basically all that is known by IE staff as of this date FACILITY: Duke Power Company Oconee f 0~
License Nos. DPR-38, DPR-47, DPR-55 Near Seneca, South Carolina

==SUBJECT:==
UNPLANNED RADIOACTIVE GAS RELEASE WITHIN REGULATORY LIMITS On October 13 at approximately 9:30 a.m. while performing routine checks of the Oconee Unit 2 reactor containment purge valves, procedural steps were not followed in the proper sequence. This resulted in a purge path being opened to the environment for about 46 seconds. The containment was at 0.6 psig and decreased to 0.2 psig during this time, releasing 13 curies of noble gases, 75 microcuries of iodine-131, and 465 microcuries of tritium. No technical specification limits were exceeded. This release is 0.026 percent of the annual limit. The resulting total dose at the site boundary due to this unplanned release was calculated by the licensee to be 0.003 millirem. Region II Radiation Specialists will followup on this event during the next scheduled routine inspection.
Media interest is expected as the licensee is making a press release. The hRC dose not plan a news release.
The State of South Carolina has been notified.
Region II (Atlanta) received notification of this occurrence by telephone from NRC HQ Duty Officer at 8:00 a.m. on October 14, 1980.                 -

==Contact:==
J. M. Puckett, RII 242-5593; A. F. Gibson, RII 242-5542 Distribution:
Chairman Ahearne Transmitted H. St. k)1 Commissioner Hendrie      S. J. Chilk, SECY Commissioner Gilinsky                Commissioner Bradford     C. C. Kammerer, CA ACRS                      (For Distribution)
Transmitted: HNBB N- M               P. Bldg. f . [            IE:X00SN~) TIE:HQDist.)
W. J. Dircks, EDO                    H. R. Denton, NRR C. Michelson, AEOD                   R. H. Vollmer, NRR        Landow [ f 9 (6 min /page)
J. J. Fouchard, PA                   F. Schroeder, NRR         J. J. Cummings, OIA N. M. Haller, MPA                    D. F. Ross, NRR R. G. Ryan, SP                       D. Eisenhut, NRR          MAIL H. K. Shapar, ELD                    S. H. Hanauer, NRR        R. Minogue, SD IE:XOOS Willstek"f/               Document Mgt. Br. (For PDR/LPDR)
Applicable Residept Site         ~
J. G. Davis, NMSS Regional Offices / C     ,
T. E. Murley, RES PRELIMINARY NOTIFIC/. TION 8304280419 801014                                         %
h-I 150        PDR gg}}

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