ML19273B830
| ML19273B830 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 05/14/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| References | |
| NUDOCS 7906180228 | |
| Download: ML19273B830 (1) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMisslON gg.
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WALNUT CREEK, CALIFORNI A 94596 i
May 14, 1979 i
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i, Docket No. 50-312 u
Sacramento Municipal Utility District P. O. Box 15830 Sacramento, California 95813 Attention: Mr. John J. Mattimoe Assistant General Manager Gentlemen:
In accordance with our letter dated April 1,1979 transmitting Bulletin 79-05, we are enclosing Preliminary Notification 79-67AN.
Sincerely, "I
fr)fgelken,
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.,i Director
Enclosure:
PHO-79-67AN cc w/ enclosure:
y-5 R. J. Rodriguez, SMUD L. G. Schwieger, SMUD 1
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IMMEDIATE PRELIMINARY NOTIFICATION
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May 14, 1979 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-79-67AN (Corrected)
This preliminary notification constitutes summary information of an event of safety or public interest significance.
il f>A?,[ ~gr..Q fxT' f$ h Facility: Three Mile Island Unit 2
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Subject:
NUCLEAR INCIDENT AT THREE MILE ISI.AND qs g g' n f
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f, Operational Status
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1.
The average coolant temperature is being maintained at 170 degrees F by natural circulation.
Pressure is about 650 psi.
Steam is being admitted to the main condenser through the turbine bypass valves from the A Steam Generator.
The highest incore temperature read-ing is 308 degrees F.
2.
All four trains of the independent, additional charcoal filter system are presently operable.
Normally three trains are operating at any one time to provide additional filtration for the entire gas-cous effluent flow from Unit 2.
Iodine concentrations in the gas-cous effluent have been below instantaneous release limita and below detectable levels most of the time.
3.
Preliminary hydrostatic testing of the existing decay heat removal system ("A" and "B" loops) has been performed.
Leaks have been identified and are being corrected.
4.
The pressurizer has been taken " solid" periodically to obtain can-firmatory information on pressurizer level and to check primary nystem leak rate.
5.
Measurecents of the liquid level inside containment is planned in the near future by measuring the hydrostatic head on the sump discharge piping using a recently installed Helse gage.
Environmental Status Environmental radiation levels continue to be consistent with natural back-ground levels. There were approxituttely four minor releases during the past week (May 7-13, 1979) associated with venting of the primary makeup tank and work on the new filter train system and monitors. During this period 14 24-hour continuous air samples and 27 air grab (1 to 2 hr.) samples were collected, and all were less than MDA.
A goat milk sample taken on May 8, 1979 contained an I-131 concentration of 12 pCi/ liter.
The latest goat milk sample collected and analyzed on May 13 showed less than MDA for I-131 (FIO pCi/1).
Grass samples taken at the goat farm showed 1-131 levels less than MDA. Cow milk samples and grass samples from other locations show less than HDA levels for I-131.
Ground surveys continued to show radiation to be at background levels. Aerial surveillance flights have not shown any levels of I-131 above MDA.
Other Federal Agencies have not reported any positive values for samples taken during this period.
' 2 CONTINUED r li fg INg i1 i
IMMEDIATE PRELIMINARY NOTIFICATION Qi 22 J 7006060178
" Continued May 14, 1979 Page 2 PNO-79-67Ni(Corrected)
Contact:
RCPaulus, IE x27246; DThompson, IE x28487 Distribution:
Transmitted H St i*
Chairman llendrie Conanissioner Bradford S. J. Chilk, SECY Cozrsissioner Kennedy Cocanissioner Ahearne C. C. Kammerer, CA Coacissioner Gilinsky,
ACRS (For Distribution)
Transmitted:
MNBB P. Bldg 8]!?O J. G. Davis IE L. V. Cossick, EDO H. R. Denton,"NRR Region I trtp $' g II. L. Ornstein, EDO R. C. DeYoung, NRR Region II 9'.L6 J. J. Fouchard, PA P.. J. Mattson, NRR Region III 3'.',
N. M. Haller, MPA V. Stello, NRR Region IV 14.u R. G. Ryan, OSP R. S. Boyd, NRR Region V Lj ' 46 H. K. Shapar, ELD SS Blds !f:Zo (MAIL)
W. J. Dircks, NMSS J. J. Cumings, OIA S. Levine, RES R. Minogue, SD IE (TMI) Site (Provide copy to STATE)
C. Abraham, PA (Middletown - TMI-Informat. ion Center)
White House Situation Room FDAA (Provide copies to the Administrator and the Operations Center)
EPA DOE /EOC PEMA BRP (State of PA)
DCPA HEW Handcarry (FAA)
IMMEDIATE PRELIMINARY NOTIFICATION
.