ML19273B838
| ML19273B838 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay, Diablo Canyon |
| Issue date: | 05/21/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Crane P PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7906180265 | |
| Download: ML19273B838 (1) | |
Text
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[ %)g /,,g NUCLEAR REGULATORY COMMISSION REGION V a: :'
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S 1990 N. CALtFORNIA DOULEVARD e
SulTE 202, WALNUT CHE E K PLAZA 44,,+
WALV.Je CRF E K. CAllF ORN? A 94506 May 21, 1979 Docket flos. 50-133 50-275 50-323 Pacific Gas and Electric Company 77 Beale Street San Francisco, California 94106 Attention:
Mr. Philip A. Crane, Jr.
Assistant General Counsel Gentlemen:
In accordance with our letter dated April 1,1979 transmitting Bulletin 79-05, we are enclosing Preliminary flotification 79-67A0.
Sincerely, V6dtp" frector
Enclosure:
PNO-79-67A0 cc w/ enclosure:
W. Barr, PG&E W. Raymond, PG&E E. Weeks, PG&E, Humboldt Bay J. D. Worthington, PG&E R. Ramsay, PG&E, Diablo Canyon 7906180265
a IMMEDIATE PRELIMINARY NOTIFICATiGN May 21, 1979 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-79-67AO This preliminary notification constitutes summary information of an_ event of safety or public interest significance.
The information presented in a summary of information as of 7:00 a.m. on May 21, 1979.
Facility: Three Mile Island Unit 2 Middletown, Pennsylvania (DN 50-320)
Subject:
NUCLEAR INCIDENT AT THREE MILE ISL.AND Plant Status Operational:
1.
The average coolant temperature is being maintained at 170 degrees F by natural circulation.
Pres 4ure is about 300 psi.
Steam is being admitted to the main ecndenser through the turbine bypass valves from the A Steam Generator. The highest incore temperature reading is 301 degrees F.
2.
Hydrostatic testing of the existing decay heat removal system "B" loop has oeen performed satisfactorily.
Leaks have been identified and are being corrected in the "A" loop.
3.
The pressurizer has been taken " solid" periodically to obtain confirmatory information on pressurizer Icvel and to check primary system 1cak rate.
4.
The water level in the reactor building was measured and found to be 6.I' above floor level. This is about 450,000 gallons.
5.
One of two primary system pressure indications now in use is giving erratic readings. Direct.cading pressure gages can be connected to the system if needed.
Environmental Statua Environmental radiation levels continue to be consistent with natural background levels. Approximately six minor releases have occurred during the past week (May 14-20) in conjunction with changing levels in the primary make-up tank and sampling the primary system. Aerial and ground surveys taken during these releases indicated no radiation levels above background, except for a release at 1300 on May 16, when an aerial measurement above the stack read 0.05 mR/hr.
No radiation was detected on the ground. During the period May 14-20, approxi-mately 36 air samples were collected and all were less than HDA.
Vegetation and milk samples collected during this period also showed no activity above MDA. - EPA and FDA air, water milk and food samples collected during this past week up to May 19 showed no detectable activity from TMI.
m nren w ra c,e o M1b/l0 $
CosrInuco 7906060181
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Continued May 21,1979 Page 2 PNO-79-67A0
Contact:
RCPaulus, IE x27246 DThompson, IE x28487 Distribution:
Transmitted II St it:04 Chairman Hendrie Corruissioner Bradford S. J. Chilk, SECY Comissioner Kennedy Concissioner Ahearne C. C. Kaarocrer, CA Cominstoner Gilinsky ACRS (For Distribution)
Transmitted: MNBB P. Bldg II*.co _
J. G. Davis, IE L. V. Gossick, EDO H. R. Denton, NRR hegion 1 11^t4 fl.*ff II. L. Ornstein, EDO R. C. DeYoung, NRR Region 11 ff *, In J. J. Fouchard, PA R. J. Ma tYn, NRR Region III It'.ff N. M. Haller, MPA V. Stello,.4RR Region IV R. G. Ryan, OSP R. 5. Doyd, NRR Region V./2 fog H. K. Shapar, ELD SS Bldg (F M )
W. J. Dircks, NMSS J. J. Cumings, OIA S. Levine, RES R. Minogue, SD IE (THI) Site (Provide copy to STATE)
C. Abraham, PA (Middletown - THI-Infomation Center)
Wite House Situation Room FDAA (Provide copies to the Administrator and the Operations Center)
EPA DOE /EOC FEMA BRP (State of PA)
DCPA HEW Handcarry (FAA) e_ - -
IFDfEDIATE PRELIMINARY NOTIFICATION t
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