ML19246A527
| ML19246A527 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 05/31/1979 |
| From: | Madsen G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Millen C PUBLIC SERVICE CO. OF COLORADO |
| References | |
| NUDOCS 7907030254 | |
| Download: ML19246A527 (1) | |
Text
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CEllTRAL FILES
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AR LINGTON, TE X AS 76012 11ay 31,1979 Docket flo. 50-207 Public Service Company of Colorado ATTN:
Mr. r Millen
..ce President P. O. Esox emu Denver, Colorado 80201 Gentlemen:
In accordance with Mr. Seyfrit's transmittal letter of April 9,1979, the enclosed Preliminary Notification (s) relating to the fluclear Incident at Three Mile Island is fonvarded for your information.
Sincerely,
$NsW G. L. !!adsen, Chief Reactor Operations anel fluclear Support Branch
Enclosure:
1.
PNO-79-67AQ cc w/ enclosures:
'v. U. Uarembourg, fluclear Production Manager Fort St. Vrain Nuclear Station P. O. Box 368 Platteville, Colorado 80651 L. Brey, Quality Assurance (Same Address).
275 098 7907 0302ff
IMMEDIATE PREL.MINARY NOTIFICATION May 29, 1979 FRELIMINARY NOTIFIr'. TION OF AN EVENT OR UNUSUAL OCCURRENCE -- PNO-79-67AQ This preliminary or ification ovovides ordstad information of oafety or public intereot aienificance.
Facility: Three Mile Island Unit 2 Middletown, Pennsylvania (DN 50-320)
Subj ec_ t;:
NUCLEAR INCIDENT AT THREE MII.E ISLAND Operational.
1.
The average coolant temperature as 158 degrees F and being maintained around that temperature by natt:st circulation.
Pressure is about 450 psi with the pressurizer in solid rperation.
Steam is being admitted to the main condenser through the turbine bypass valve from the A Steam Generator.
The highest incore te.mperature 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 tessure, due to increasing water level.
Secondary sources of 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 conpletion 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 Icvels of naturally occurring Ra-222 caused by a weather front coving through the area.
Airborne releases have been below Technical Specification limits.
During the period May 21-28, approximately 35 air samples were collected by the NRC and all were less than MDA. Vegeta-tion and milk samples collected dur2ng this period also showed no activ' above MDA.
EPA air, wat2r and milk samples collected during this past to May 24 showed no detectable activity from TMI.
The State of New Jersey reported thatgg ~~
milk sacples they analyzed between M.
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