ML19224C420
| ML19224C420 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 06/05/1979 |
| From: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 7907020309 | |
| Download: ML19224C420 (1) | |
Text
- pa ne c u
'o, UNIT ED STATES
[ fp r, c, i h NUCLEAR REGULATORY COMMISSION sg.QygV[.l REGION IV
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G11 RYAN PLAZA ORIVE, SUITE 1000 U,..'...
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,o' ARLINGTON, TEXAS 76012 June 6, 1979 Docket No.
445 a.446 Texas Utilities Generating Company ATTft: Mr. R. J. Gary, Executive Vice President and General Manager 2001 Bryan Tower Dallas, Texas 75201 Gentlemen:
Enclosed is supplement AR to Preliminary Notification Pf40-79-67, "fluclear Incident at Three Mile Island," dated June 4, 1979.
Should you have any questions regarding this review, please contact this of fice.
Sincerely,
/l
'O-W. C. Seidje, Chief Reactor Construction and Engineering Support Branch
Enclosure:
Pfl0-79-67AR 271 146 7907020'3tj j
IMMEDIATE PRELIMINARY NOTIFICATION June 4, 1979 PRELIMINARY NOTIFICATION OF AN EVENT OR UhTSUAL OCCURPINCE -- PNO-79-67AR This preliminary notification provides updated infomst, ion of safety or public interest significance.
Facility: Three Mile Island Unit 2 Hiddletown, Pennsylvania (DN S0-320)
Sub M :
NUCIIAR INCIDENT AT TEEE MILE ISLAND Operational:
1.
The average coolant temperature is 157 degrees F end being maintained around that temperature by natur.1 circulation.
ensure is about 340 psi with the pressurizer in solid operation.
Stes:a is _eing admitted to the main condenser through the turbine bypass valve from the A Steam Generator.
The highest incore temperature reading is 286'F.
2.
Water level in the reactor building is being measured daily, and was 7.0 feet above floor level this morning.
3.
Pre' operational testing remainc in progress for the Spent Fuel Pool Tank Fam, Once-Through Steam Genera tar "B" Long-Tem Cooling System, and the codified rad waste treatment system (EPICOR).
The testiog is scheduled for completion by June 8.
The pressure / volume control system is due to be turned over for preoperational testing in a few days.
4.
An individual posing as an employee of a legitimate contractor at THI-2 attempted.to gain accese to the site at 10:45 p.m. on June 2, 1979. The person did not have a site photo identification badge and was refused access by the security guard at ite south gate. The individual left the site access area while the guard was at:cmpting to verify his identity.
The guard obtained the imposter's veticle license number (California plate). The individual has been tentatively identified by the Pennsylvania State Police.
No further action 2s planned by the licensee.
Additional followup of this matter will be conducted by the Region I office.
5.
.PNO-79-677 reported:
"The hydrogen recombine:- tripped off at 0115 on April 13 (burned out heaters)... A decision had not been made whether te replace the heaters or to initiar.e operation of the backup recombiner."
It was later determined that the recombinar trip was caused by a shorted quick-disconnect plug.
The failur
=
returned to operation on April 15.
DUPLICATE DOCUMENT 271 147 Envirocmental Status Entire document previously entered into system under:
Environ = ental radiation levels continu levels. Airborne relesses have been b(
h))h ANO During the period May 29 - June 4, app No. of pages:
k CONT
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