ML19273B829
| ML19273B829 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 05/14/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Goodwin C PORTLAND GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 7906180221 | |
| Download: ML19273B829 (1) | |
Text
l5V c
d D
UNITED STATES i
j 4
[.
.,I+g NUCLEAR REGULATORY COMMISslON j
REGIOfJ V Jg R pg Os
SUITE 202, W ALNUT CREEK PL AZ A U
1990 N. CALIFORNI A DOULEVARD S
- +e,#
W ALNUT CREEK. C AllF ORNI A 94596 May 14, 1979 P
tl 4
i Docket No. 50-344 Portland General Electric Company 121 S. W. Salmon Street Portland, Oregon 97204 Attention:
Mr. Charlc Goodwin Assistant Vice President Gentlemen:
In accordance with our letter dated April 1,1979 transmitting Bulletin 79-05, we are enclosing Preliminary Notification 79-67AN.
Sincerel,
b
)(f}l
/
. E ge ken irector
Enclosure:
PN0-79-67AN r-I cc w/ enclosure:
B. Withers, PGE l
F. Gaidos, PGE k
6 7906180M[{
[
- n ~..
[
f
IHMFDIATE PRELIMINARY NOTIFICATION Hay 14, 1979 PSELIMINARY NOTIFICATION OF EVENT OR UNUSDAL OCCURRENCE -- PNO-79-67AN (Corrected)
This preliminary notification constitutes summary information of an event of safety or public interest significance.
g' j t ! !;g 78'
.t.
- ~-\\
c
,. ' %(], <,l Facility: Three Mile Island Unit 2 (d p,Si i $ yfi3 NL Hiddletown, Pennsylvania (DN 50-320) q
Subject:
NUCLEAR INCIDENT AT THREE MILE ISLAND r'f
\\'
vb-
'i Operational Status kl;,7 f '
)
N /C TEi, \\
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 er.?. ire gas-cous effluent flow from Unit 2.
Iodine concentrations in tie gas-cons effluent have been below instantaneous release limita and below detectabic levels most of the time.
3.
Preliminary hydrostatic testing of the existing decay heat removal system ("A" and "B" J oopa) has been performed.
Leaks have been identified and are being corrected.
4.
The pressurizer has been taken " solid" periodically to obtnin con-firmatory information on pressurizer level and to check primary nystem leak rate.
5.
Measurements of the liquid IcVel inside containment is planned in the near future by measuring the hydrostatic head on the sump 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 thin period 14 24-hour continuous air samples and 27 air grab (1 to 2 hr.) samples were collected, and all were less than HDA. 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 pCL/1).
Grass samples taken at the goat farm showed I-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.
ran nran na R 9'FF
[yg y $
" i CONTI %t.u IMMEDIATE PREL:MINARY NOTIFICATION 790606017S
Continued May 14, 1979 Page 2 PNO-79-67Ni(Corrected)
_Contag: RCPaulus, IE x27246; DThompson, IE x28487 Ifistribution:
Transmitted H St 'I *'
~ ~
Chaiman Hendrie Conanissioner Bradford S. J. Chilk, SECY Coarsissioner Kennedy Counaissioner Ahearne C. C. Kammerer, CA Coenissioner Gilinsky ACRS (For Distribttion)
Transmitted:
MNBB P. Bldg 3?iO J. G. Davis, IE L. V. Gossick, EDO H. R. Dendr 7NRR Region I N b' M H. L. Ornstein, EDO H. C. DeYoung, NRR Region II T d ~
J. J. Fouchard, PA R. J. Mattson, NRR Region III
- :s N. M. Haller, MPA V. Stello, NRR Region IV R. G. Ryan, OSP R. S. Boyd, NRR Resign V Lj '. '/6 H. K. Shapar, ELD SS Bldg (gio (MAIL)
W. J. Dircks, NMSS J. J. Cunnings, 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 ERP (State of PA)
DCPA REW Handcarry (FAA)
JMMEDIATE PRELIMINARY NOTIFICATION 4