ML19273B820
| ML19273B820 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 05/16/1979 |
| From: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Eric Turner HOUSTON LIGHTING & POWER CO. |
| References | |
| NUDOCS 7906180176 | |
| Download: ML19273B820 (1) | |
Text
h300 a **cu ao, UNITED STATES NSla e
NUCLEAR REGULATORY COMMISSION
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c [E REGION IV 0,
611 RYAN PLAZA DRIVE, SUITE 1000
,6 ARLINGTON, TEXAS 7G012
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r May 16, 1979 Docket No. 50-498 50-499 Houston Lighting and Power Company ATTN:
Mr. E. A. Turner, Vice President Power Plant Construction and Technical Services Post Office Box 1700 Houston, Texas 77001 Gentlemen:
Enclosed is supplement AN to Preliminary Notification PNO-79-67, " Nuclear Incident at Three Mile Island," dated May 14, 1979.
Should you have any questions regarding this review, please contact this office.
Sincerely, pW.C.Seidle, Chief Reactor Construction and Engineering Support Branch
Enclosure:
PNO-79-67AN 7906180 / 7[g i
.IMMEDIATE PRELIMINARY NOTIFICATION hay 19, 1979 PP.ELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCORRENCE== PEO-7C-67AN (C This preliminary notification constitutes summary inforgation of an event of safety or public interest significance.
Facility:
Three Mile Island.Unir. 2 Middletown, Pennsylvania (DN 50-320)
Subject:
NUCI. EAR 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-cous effluent flow from Unit 2.
Iodine concentrations in the gas-eous effluent have been below instantaneous release limits and belov detectable levels most of the time.
3.
Preliminary hydrostatic testing of the existing decay heat removal
,e" 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.
heasurements of the liquid level inside containment is planned in the near futuro by measurins the hydtuntaLic Lead un the numu 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 rilter train system anc 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 fans showed I-131 levels less than MDA.
Cow milk samples and grass samples from other locations 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 HDA. Other Federal Agencien have not reported any. positive values for samples taken during this period.
c0NTINUED l
D 1 A
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d INiEDIATE PRELIMINARY NOTIFICATION J o
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7006060i78
Continued May 14, 1979 Page 2 PNO-79-67AN (Corrected)
Contact:
RCPaulus, IE x27246; DThompson, IE x28487 Distribution:
Transmitted H St 4 *"
Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY Coe:missioner Kennedy Commissioner Ahearne C. C. Xacmerer, CA Cocznissioner Gilinsky ACRS (For Distribution)
Transmitted:
MNBB 4 P. Bldg 3)!!O J. C. 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 _'t'.L6 J. J. Fouchard, PA R. J. Mattson, NRR Region III 'j'.',L 7,
N. M. Haller, MPA V. Stello, NRR Region IV Lj 34 R. G. Ryan, OSP R. S. Boyd, NRR Region V
~
H. K. Shapar, ELD SS Bldg R:Zd (MAIL)
W. J. Dircks, NMSS J. J. Cu.nningo, OIA S. Levine, RES R. Minogue, SD IE (TMI) Site (Provide copy to STATE)
~
C. Abrabaci, PA (Middletown - TMI-Information Center)
White House Situation Rooca FDAA (Provide copies to the Administrator and the Operations Center)
EPA DOE /EOC PEMA BRP (State of PA)
DCPA REW Handcarry (FAA)
ItitiLDINfE PRELIMINARY NOTIFICATION e
e r
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