ML19246A530
| ML19246A530 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 05/31/1979 |
| From: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Weigand D GULF STATES UTILITIES CO. |
| References | |
| NUDOCS 7907030259 | |
| Download: ML19246A530 (1) | |
Text
SG gf Io, UNITED STATES y 7) w,
' 'g NUCLEAR REGULATORY COMMISSION O
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611 RYAN PLAZA DRIVE, SUITE 1000
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ARLINGTON, TEXAS 7G012 May 31,1979 Docket No. 50-458 50-459 Gulf States Utilities ATTN: Dr. D. G. Weigand, General Manager Nuclear Projects Post Office Box 2951 Beaumont, Texas 77704 Gentlemen:
Enclosed is supplement AQ to Preliminary Notification Pf;0-79-67, " Nuclear Incident at Three Mile Island," dated May 29, 1979.
Should you have any questions regarding this review, please contact this office.
Sincerely j
W. C. Seidle, Chief Reactor Cooktruction and Engineering Support Branch
Enclosure:
PN0-79-67AQ 275 105
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1 IMMEDIATE PRELIMINARY NOTIFICATION May 29, 1979 PRELIMINARY NOTIFICATION OF AN EVENT OR UNUSUAL OCCURRENCE -- PNO-79-67AQ This preliminary not i fi cati nn nrnvide= updated information of oorcty or public in:crent oignificance.
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Facility: Three Mile Island Unit 2 Middletown, Pennsylvania (DN 50-320)
Subject:
NUCLEAR INCIDENT AT THREE MILE ISLAND Operational:
1.
The average coolant temperature is 158 degrees F and being maintained around that temperature by naturai circulation.
Pressure is about 450 psi with the pressurizer in solid operation.
Steam is being admitted to the main condenser through the turbine bypass valve from the A Steam Generator.
The highest incore temperature reading is 291*F.
2.
Water level in the reactor building is being measured daily, and was 6.8 feet above floor level this corning.
The lowest decay heat system motor-operated valve (DH-V2) in the reactor building was opened on May 25 as a precautionary measure, due to increasing water level.
Secondary sources o,f water into the reactor building have since been isolated, including the fan coolers water supply, to reduce water in-leakage.
3.
Preoperational testing is in progress for the Spent Fuel Pool Tank Farm, once-Through Steam Generator "B" Long-Term Cooling System, and the modified rad waste treatment system (EPICOR).
The testing is scheduled for completion by June 1.
Environmental Status Environmental radiation levels continue to te consistent with natural background levels.
A slight change in background level on May 24 and 25 was shown to be due to changing levels of naturally occurring Rc-222 caused by a weather front covitrg through the area.
Airborne releases have been below Technical Specification limits.
During the period May 21-28, approximately 35 nir samples were collected by the hTIC and all were less than IfDA. Vegeta-tion and milk samples collected dur2ng this period also showed no activity above MDA.
EFA air, water and milk samples collected during this past week up to May 24 showed no detectable activity f rom Tt!I.
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