ML19221A562
| ML19221A562 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/14/1979 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-79-067AN, PNO-79-67AN, NUDOCS 7905230198 | |
| Download: ML19221A562 (2) | |
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IMMEDIATE PRELIMINARY NOTIFICATION May 19, 19ss
' MELfMINARY NTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-79-67AN (Corrected)
This preliminary notification constitutes summary information of an event of safety or public interest si2nificance.
Facility: Three Mile Island Unit 2 Middletown, Pennsylvania (DN 50-320)
Subject:
NUCLEAR INCIDENT AT THREE MILE ISLAND Operational Status 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-eous effluent flow from Unit 2.
Iodine concentrations in the gas-ecus effluent have been below instantaneous release limits and below detectable levels most of the time.
3.
Preliminary hydrostatic testing of the existing decay h. at removal system ("A" and "B" loops) has been perfor=ed.
Leaks have been identified and are being corrected.
4 The pressurizer has been taken " solid" periodically to obtain con-firmatory information on pressurirer level and to check primary system leak rate.
5.
Measure =ents of the liquid level inside containment is planned in the near future by measuring the hydrost-tic head on the sump discharge piping using a recently insta12ed Heise gage.
164 267 Environmental Status Envirenmental radistion levels continue to be consistent with natural back-ground levels.
There were approximately 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 (F10 pCi/1).
Grass samples taken at the goat farn showed I-131 levels less than MDA. Cow milk sa=ples and grass samples from other locations show less than MDt. 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 sacples taken during this period.
CohIINUED IMMEDIATE PRELIMINARY NOTIFICATION 79052301ts
b.
Continued May 14, 1979 Page 2 PNO-79-67AN (Corrected)
Contact:
RCPaulus, IE x2724f, DThompson, IE x23487 Distribution:
Transmitted H St 4 *~
Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY Cotamissioner Kennedy Cocraissioner Ahearne C. C. Kammerer, CA Comissioner Gilinsky ACRS (For Distribution)
Transmitted: MNBB P. Bldg 3!!O J. G. Davis. IE L. V. Gossick, EDO H. R. Denton, NRR Region I N E T H. L. Ornstein, EDO R. C. DeYoung, NRR Region II M'.L5 J. J. Fouchtrd, PA R. J. Mattson, NRR Regica III 9 '2d N. M. Haller, MPA V. Stello, NRR Region IV R. G. Ryan, OSP R. S. Boyd, NRR Regirn V H
K. Shapar, ELD SS Bldg 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. Abranam, PA (Middletown - TMI-Information 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 164 268