ML19273B827
| ML19273B827 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 05/16/1979 |
| From: | Madsen G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Millen C PUBLIC SERVICE CO. OF COLORADO |
| References | |
| NUDOCS 7906180202 | |
| Download: ML19273B827 (1) | |
Text
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CENTRAL FILES p** " %,
UNITED STATES PDR: liq NUCLEAR REGULATORY COMMISSION LPDR' z
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$.l REGION IV
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May 16, 1979 Docket flo. 50-267 Public Service Company of Colorado ATTN: Mr. C. K. Millen Senior Vice President P. O. Box 840 Denver, Colorado 80201 Gentlemen:
In accordance with Mr. Seyfrit's transmittal letter of April 9,1979, the enclosed Preliminary Notification (s) relating to the Nuclear Incident at Three Mile Island is fonvarded for your information.
Sincerely, YNo G. L. Madsen, Chief Reactor Operations and Nuclear Support Branch
Enclosure:
1.
PNO-79-67AN cc w/ enclosure:
D. '.l. Warembourg, Nuclear Production Manager Fort St. Vrain Nuclear Station P. O. Box 368 Platteville, Colorado 80651 L. Brey, Quality Assurance (Same Address) 700618080/1
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.IhttEDIATE PRELIMINARY NOTIFICATION May 14, 19/9 PP.ELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCthhCE== P?!O=70-67AN (Ca This preliminary notificatiou constitutes summary information of an event of safety or public interest significance.
Facility:
Three Mile Island Unir. 2 Middletown, Pennsylvania (DN 50-320)
Subject:
NUCLEAR INCIDENT AT THREE MILE ISLVM
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Operational Status 1.
The average coolant temperature is being maintained at 170 decrees 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 concentracions in the gas-eous effluent have been below instantaneous release limits 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 con-firmatory information on pressurizer level and to check primary system leak rate.
5.
Measurements of the liquid level inside containment is planned in the near futuro by measurins the hydtuntaLit head una the dump discharge piping using a recently installed Heise gage.
Environmental Status Environmental radiation 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 farm showed I-131 levels less than MDA. Cow milk samples and grass samples from other locatiuu: show less than MDA 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.
_ -,, ~ m r3 c ra CONTINUED
{ ] (( f y;a y IMMEDIATE PRELIMINARY NOTIFICATION
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7906060178
4 Continued May I4, 1979 Page 2 PNO-79-67AN (Corrected)
Contact:
RCPaulus, IE x27246; DThompson, IE x28487___
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Distribution:
Transmitted H St 4* CU Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY Commissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Comminaioner Gilinsky ACRS b
(For Distribution',
I *b P. Bldg 9:10 J. C. Davis, IE Transmitted:
MNBB W L. V. Gossick, EDO H. R. Denton, NRR Region I W E g '
H. L. Ornstein, EDO R. C. DeYoung, NRR Region II 9'.L6 J. J. Fouchard, PA R. J. Mattson, NRR Region III'f ' 'L ',
N. M. Haller, MPA V. Stello, NRR Region IV L, y g
R. G. Ryan, OSP R. S. Boyd, NRR Region V H. K. Shspar, ELD SS Bldg 9:Zd (MAIL)
W. J. Dircks, NMSS J. J. Cumminga, OIA S. Levine, RES R. Minogue, SD IE (TMI) Site (Provide copy to STATE)
C. Abraham, 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 I