ML19246A511
| ML19246A511 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay, Diablo Canyon |
| Issue date: | 06/19/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Crane P PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7907030232 | |
| Download: ML19246A511 (1) | |
Text
pn ne co UNITED STATES E'y'".,-,c*(*%^
NUCLEAR REGULATORY COMMISSION TE Jtti e
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SUITE 202, WALNUT CRE EK F LAZA J
1990 N. C ALIFORNIA BOULEVADD
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WALNUT CREE K. CALIFORNI A 94596 June 19,1979 Docket tios. 50-133 50-275 50-323 Pacific Gas and Electric Company 77 Beale Street San Francisco, California 94106 Attention: Mr. Philip A. Crane, Jr.
Assistant General Counsel Gentlemen:
In accordance with our letter dated April 1,1979 transmitting Bulletin 79-05, we are enclosing Preliminary flotification 79-67AT.
Sincerely,
[ [ 5, mLL ~
R. H. Engelken Director
Enclosure:
Pl10-79-67AT cc w/ enclosure:
W. Barr, PG&E W. Raymond, PG&E E. Weeks, PG&E, Humboldt Bay J. D. Worthington, PG&E R. Ramsay, PG&E, Diablo Canyon II4 047 7907osog2Sg
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i 1MMEDIATE PRELIMINARY NDTIFICATION June 18, 1979 i
PRELIMINARY NOTIFICATION OF AN EVENT OR UNUSUAL OCCURRENCE -- PNO-79-67AT This preliminary notification provides updated information of afety or public interest signific_ance.
Facility: Three Mile Island Unit 2 I
ih Middletown, Pennsylvania (DN-50-320)
Subj ec t:
NUCLEAR INCIDENT AT THREE MILE ISLiND l
Operational:
1.
The average coolant temperature is 155 degrees F and the highest incore thermocouple temperature reading is 273 degrees F.
Core cooling is being maintained by natural circulation. Pressure is about 350 psi with the prenurizer in solid operation. Steam is being admitted to the main con-denser through the turbine bypass valve from the A Steam Generator.
2.
Reactor building water level is being measured daily, and is now 7.01 0.5 feet above floor level.
This lower than p: eviously reported level is due to refinement of the measurec:e_it technique, and does not reflect an acutal level decrease.
3.
Preoperational testing for the Spent Fuel Pool Tank farm, once-Through Steam Generator "B" I.ong-Term Cooling System, the modified radwaste treatment system (EPICOR), and the pressure / volume control system pro-gressed slowly during the past week due to various operational / procurement problems eccounte red.
The testin3 may be completed within the next two weeks.
Environmental Status:
Environmental radiation levels remain consistent with natural background levels. Airbcrue releases have been beluw Technical Specification limits.
From J.me 11-17, 42 air samples, 2 milk samples, 4 vegetation samples and 2 soil samples were collected by the NRC.
All analytical results were less than MDA. EPA air, water and milk.tamples collected during the week (up to June 15) showed no detectable activity from THI.
CONTINUED m,m-__m
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i-DUPLICATE DOCUMENT
- 274, 048 Entire document previously entered into system under:
7966D76637 nNo No. of pages:
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