ML19331B643
| ML19331B643 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/04/1980 |
| From: | Mroczka E NORTHEAST UTILITIES |
| To: | |
| References | |
| MP-1-1578, NUDOCS 8008120532 | |
| Download: ML19331B643 (1) | |
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August 4,1980 MP-1-1578 Mr. Boyce H. Grier Director, Region I Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406
Reference:
Provisional License DPR-21 Docket No. 50-245 Reportable Occurrence R0-80-ll/lP
Dear Mr. Grier:
This letter is forwarded to provide prompt notification of Reportable Occurrence R0-80-ll/lP as required by Millstone Unit 1 Technical Specifications.
On August 3,1980 at 0215 hours0.00249 days <br />0.0597 hours <br />3.554894e-4 weeks <br />8.18075e-5 months <br />, while investigating the reason for low off gas sample flow and radiation level, it was ciscovered that the off gas delay pipe sample line manual stop valve was closed.
The delay pipe had been placed in service on 8/2/80 at 2235 hours0.0259 days <br />0.621 hours <br />0.0037 weeks <br />8.504175e-4 months <br /> following minor operating difficulties with the off gas racombiner system. With this va.lve closed and the off gas delay pipe in service, a high off gas condition would not have resulted in closure of the off gas isolation valve.
Upon realization of the problem, the samp1s line stop valve was opened and nomal off gas monitoring was restored. At the time of the occurrence, the plant was operating at steady state full power.
Results of the investigation into the incident and further analysis will be included in the follow-up 14 day report.
Yours truly, NORTHEAST NUCLEAR ENERGY COMPANY N
/u E. J. Mro a
Station Superintendent
//U Millstone Nuclear Power Station EJM/MJB:lls cc: Director, Office of Management Infomation and Program Control, Washington, D.C.
(2)
U. S. Nuclear Regulatory Commission, c/o Document Management Branch, Washington, D.C. 20555
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