ML19246A531
| ML19246A531 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 05/31/1979 |
| From: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 7907030262 | |
| Download: ML19246A531 (1) | |
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UNITED STATES 8 y ),,, f' j NUCLEAR REGULATORY COMMISSION Shi ~M/ [<
Of; REGION IV 611 RYAN PLAZA DRIVE, SUITE 1000
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May 31,1979 Docket No. 50-445 50-446 Texas Utilities Generating Company ATTN: Mr. R. J. Gary, Executive Vice President and General Manager 2001 Bryan Tower Dallas, Texas 75201 Gentlemen :
Enclosed is supplement fQ to Preliminary hotification PNO-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, eke W. C. Seid,lh, Chief Reactor Cordtruction and Engineering Support Branch
Enclosure:
PNO-79-67AQ 275 116 7907 03QRQg y
IMMEDIATE PRELIMINARY NOTIFICATION May 29, 1979 PRELIMINARY NOTIFICATION OF AN EVENT OR UNUSUAL OCCURRENCE -- PNO-79-67AQ This preliminary notification ornvides updatad in form = tion o f oa re ty or public i n :c re n t aienificance. Facility: Three Mile Island Unit 2 Middletown, Pennsylvania (DN 50-320)
Subject:
NUCLEAR INCIDETf AT TIG1EE MILE ISLAND Operational: 1. The average coolant temperature is 158 degrees F and being maintained around that temperature by natural 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 morning. The lowest decay heat system motor-operated valve (DH-V2) in the reactor building was opened on May 25 as a precautionary measure, due tc 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 tha modified rad waste treatment system (EPICOR). The testing is scheduled for completion by June 1. Environmental Status Environmental radiatior levels continue to te consistent with natural background levels. A slight change in background level on May 24 and 25 was showr. to be due to changing 1cvels of naturally occurring Ro-222 caused by a wea-r f ront covi:rg through the area. Airborne releases have been below Tect al Specification limits. Duri:_g the period May 21-28, approximately 35 au samples were collected by the NRC and all were less than MDA. Vegeta-tion and milk samples collected during this period also showed no activity above MDA. EPA air, water and ailk samples collected during this past week up to May 24 showed no detectable activity from TMI. m milk saaples they analyzed betwee DUPLICATE DOCUMENT } [,r) ff[ The State of New Jersey reported - samples included c1 ilk from conati ent previously entered and supplied to New Jersey consuee Entire doc New Jercey farms. into sys h ANO No. of Pges: - n}}