ML19246A517
| ML19246A517 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/19/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| References | |
| NUDOCS 7907030242 | |
| Download: ML19246A517 (1) | |
Text
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NUCLEAR REGULATORY COMMISSION YA@q E
REGION V g $siMjb.: [,
1990 N. CALIFORNI A BOULEVARD
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SUITE 202 WALNUT CREEK PLAZA WALNUT CREE K, CALIFORNIA 94596 June 19, 1979 Docket No. 50-312 Sacramento Municipal Utility District P. O. Box 15830 Sacramento, California 95813 Attention:
Mr. John J. Mattimoe Assistant Genecal Manager Gentlemen:
In accordance with our letter dated April 1,1979 transmitting Bulletin 79-05, we are enclosing Preliminary fictification 79-67AT.
Sincerely, flSi$~pOE R. H. Engelken Director
Enclosure:
PNO-79-67AT cc w/ enclosure:
R. J. Rodriguez, SMUD L. G. Schwieger, SMUD 274 074 7907 039,2.9 %
, [1 IMMEDIATE PRELIMINARY NOTIFICATION June 18, 1979 PRELIMINARY NOTIFICATION OF AN EVENT OR UNUSUAL OCCURRENCE -- PNO-79-67AT This neeli_minary notification provides updated information of saf ety or public interest significance.
Facility: Thrae Mile Island Unit 2 S
i lb Middletown, Pennsylvania (DN-50-320)
Su'oj ec t:
NUCLEAR INCIDENT AT THREE MILE ISLAND I
Operational:
1.
The average coolant temperature is 155 degrees F and the highest incore thermocouple temperature reading is 273 degrees F.
Core cooling in being maintained by natural circulation. Pressure is about 350 psi with the pressurizer in solid operation.
Steam is being athnitted 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 previously reported level is due to refinement of the measurement technique, and does not reflect an acutal level decrease.
3.
Preoperational testing for the Spent Fuel Pool Tank Farm, Once-Through Steam Generator "B" Long-Term Cooling System, the modified radwaste treat:nent system (EPICOR), and the pressure / volume control system pro-gressed slowly during the past week due to various operational / procurement problems encountered. The testing may be completed within the next two weeks.
Environmental Status:
Environmental radiation levels remain consistent with natural background levels. Airborne releases have been below Technical Specification limits.
From June 11-17, 42 air samples, 2 milk samples, 4 vegetation samples and 2 soil sagrples were collected by the NRC. All analytical results were less than MDA.
EPA air, water and milk samples collected during the week (up to June 15) showed no detectable activity from TMI.
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