ML19220C457
| ML19220C457 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay, Crane |
| Issue date: | 04/30/1979 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| Shared Package | |
| ML19220C455 | List: |
| References | |
| PNO-79-067AK, PNO-79-67AK, NUDOCS 7905040365 | |
| Download: ML19220C457 (2) | |
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I IffMEDIATE PRELIMINARY NOTIFICATION April 30, 1979 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRESCE -- PNO-79-67AX This prelimina ry notification constitutes summary information of an event of saiety or public interest signif,icance.
The information presented is a
sucmary of information as of 7:00 a.m.
ou Apri l 30, 1979.
Facility: Three Mile Island Unit 2 I,
g, Middletown, Pennsylvania (DN 50-320) i l'
Subject:
NUCLEAR INCIDENT AT THREE MILE ISLAND Plant Status The average coolaat temperature is being maintained at 175 degrees F by natural circulation.
Steam is being admitted to the main condensar through the turbine bypass valves f rom the A Steam Generator. The highest incore temperature reading is 323 degrees F.
Environmental Status One Aerial Measuring System (AMS) Survey was made on April 29, 1979. No radi.oactivity above natural background was detected.
Iodine concentration at Unit 2 ventilgtion stack for the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period ending at 12:25 a.m.
April 29 was 8.21 x 10 microcuries per cubic centimeter (Analyzed by NRC Mobile Laboratory).
An NRC survey of the site perimeter was conducted on April 29.
Radiation levels were in the range of 0.02 - 0.03 mR/hr.
Offsite Measurements Radiation Levels Offsite radiation levels identified by NRC survey teams continue to be consistent with natural background levels (0.02 mR/br maximum).
These results were obtained from routine daily surveys performed downwind on the east and west sides of the Susquehanna River at discances up to five miles north and south of the site.
Dose rates (47 locations) as measured by NRC thermoluminescent dosimeters (TLDs) for the past 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period continue to be consistent with natural background levels.
CONTINUED IMMEDIATE PRELIMINARY NOTIFICATION c
76
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Continued April 30, 1979 Page 2 PNO-79-67AK www NRC Environmental Samples (Samples taken of fsite within 3 miles of site analyzed in mobile laboratory)
Number of Sample Type Date of Sample Samples Resultr.
air 4/29 4
Less than MDA*
daily air 4/28-29 1
Less than HDA milk 4/29 3
Less than MDA discharge water 4/29 34 Less than MDA f*
vegetation 4/29 1
2.7 x 10 microcuries/
square meter EPA Environmental Samples (Analyzed at Remote Laboratory)
No Sample Results Reported.
The Commonwealth of Pennsylvania has been informed of these results.
- MDA - minimum detectable activity.
Contact:
RCPaulus, IE x27246 DThompson, IE x28487 Distribution:
Transmitted H St,hl[Q_
Chairman Hendrie Commissioner B rad fo rd S. J. Chilk, SECY Commissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Coanissioner Gilinsky (For Distribution)
Transmitted:
MNBB 30:l/C P. Bld8 (6-So J. C. Davis, IE L. V. Gossick, EDO H. R. Denton, NRR Region I II. L. Ornstein, EDO R. C. DeYoung, NRR Region IU 1/.'67 J. J. Fouchard, PA R. J. Mattson, NRR Region III (/t/O _
N. M. Haller, MPA V. Stello, NRH Region IV pl; R. G. Ryan, OSP R. S. Boyd, NRR Region V _ff;/f H. K. Shapar, ELD SS Bldg $3J,f()
(MAIL)
W. J. Dircks, h?!SS J. J. Cununings, OI A S. Levine, RES R. Minogue, SD IE (DfI) Sice (Provide copy to STATE)
C. Abraham, PA _
(Middletown - TMI-Information Center)
White House Situation Room FDAA (Provide copies to the Administrator and the Operations Center)
EPA DOE /EOC PEMA LRP (State of PA)
DCPA HEW Handcarry (FAA)
IMMEDIATE PRELIMINARY NOTIFICATION 7/
136 7
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