ML20085C929
| ML20085C929 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 10/10/1974 |
| From: | Kalivianakis N COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NJK-74-325, NUDOCS 8307130238 | |
| Download: ML20085C929 (2) | |
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!!J K-7 4-325 Telecopy:
Region III, Attention:
tir. C. Feierabend October 10, 1974 J. Keppler, Regional Director Directorate of Regulatory Operations Region III U. S. Atomic Energy Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Reference:
Quad-Cities liuclear Pouer Station, Unit 1 Docket tio. 50-254, DPR-29 Appendix A, Sections 1.0.A.3, 1.0.A.5, and 6.6.B.l.a
Dear I4r. Keppler:
The purpose of this letter is to provide you with notifi-cation of an Abnormal Occurrence as required by Technical Specification 6.6.B.l.a within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the occurrence.
At 10:04 a.m. On October 10, 1974, with Unit 1 at 520 me, an explosion occurred in the Unit 1 off gas holdup line.
The 1B Steam Jet Air Ejector rupture disc ruptured releasing off gas to the steam jet air ejector room through the tur-bine building ventilation system to the main chimney.
The i
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resultant reduction in the off-gas hold-up time caused an indicated increase from approximately 30,000 microcuries/
sec to approximately 100,000 microcuries/sec at the main chimney radiation monitors.
A GSEP condition ABEL was de-clared at 10:07 a.m.
The unit load was reduced to 320 We, the 1 A SJ AE was placed in service, and the 1B SJ AE was iso-
,i lated by 10: 30 a.n.
A reduction in radioactivity as indicated l
by the main chimney radiation monitors was noted and therefore dropped to pre-incident levels.
The 1A chimney filter was l
placed in service and the 1B' chimney filter was isolated by 10: 50 a.m.
Condition ABLE was terminated at, 11:04 a.m.
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o Mr. J. Keppler October 10, 1974 i
This occurrence was discussed by telephone with Mr. C. Feierabend of your office en October 10, 1974 Further information will be provided by Abnormal Occurrence Report A0 50-254/74-29 which will be submitted within 10 days of the date of this occurrence.
Very truly yours, COMMONWEALTH EDISON COMPANY QUAD-CITIES NUCLEAR POWER STATION r
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- .v.4. ~-'3 N. J. Kali'vianakis Station Superintendent 9
NJK/CWS/lk cc:
Directorate of Licensing J. S. Abel 9
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