ML19273B815
| ML19273B815 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 05/08/1979 |
| From: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Eric Turner HOUSTON LIGHTING & POWER CO. |
| References | |
| NUDOCS 7906180156 | |
| Download: ML19273B815 (1) | |
Text
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NUCLEAR REGULATORY COMMISSION pg g g
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611 RYAN PLAZA DRIVE, SUITE 1000 QJ M ARLINGTON, TEXAS 76011
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May 8, 1979 Docket No. 50-498 50-499 Houston Lighting and Power Company ATTN: Mr. E. A. Turner, Vice President Power Plant Construction and Technical Services Post Office Box 1700 Houston, Texas 77001 Gentlemen:
Enclosed is supplement AM to Preliminary Notification PN0-79-67, " Nuclear Incident at Three Mile Island," dated May 7,1979.
Should you have any questions regarding this review, please contact this office.
Sincerely,
, - = - -
W. C. Seid Chief Reactor Co ruction and Engineering Support Branch
Enclosure:
PNO-79-67AM 7906180lf[
IMMEDIATE PRELIMINARY NOTIFTCATION May 7 1979 PRELIMINARY NOTIFICATION OF AN EVENT OR UNUSUAL OCCURRENCE - PNO-79-67AM This preliminary notification provides updated information of safety or public interest significance.
Facility: Three Mile Is1 tad Unit 2 Middletown, Pennsylvania
Subject:
NUCLEAR INCIDENT AT THREE MILE ISIAND Operational Status:
1.
Three of four trains of an independent, additional charcoal filter system are presently in operation.
Jodine concentrations in the gaseous effluent are consistently below continuous release limits and below normally detectable levels most of the time.
2.
Hydrostatic testing of the existing decay heat removal system ("B" loop) is in progress.
3.
The pressurizer has been taken " solid" to demonstrate continued decay heat removal capability with the primary coolant system completely filled and to obtain confirmatory information on pressurizer level.
4.
Measurenent of tha liquid level inside containment is planned in the near future by ecoeuring the hydrunLatic head un the sump discnarge piping using a recently installed Heise gage.
5.
A ceasurement was made of the radioactivity inside the containment building.
It indicates that the present dose level from. gases within the building is about 100 R/br.
nrhar radiation ocureco auch -o activity deposited on the containment walls and water on the reactor building floor also contribute to the dose levels in the containment but cannot be directly estimated at this time.
Environmental Status Environmental radiation levels continue to be consistent with natural background Ir e,els.
Approximately thirteen minor releases have occurred during the past week (May 1-6) in conjunction with venting of the primary make-up tank.
Aerial and ground surveys taken during these releases indicated radiation levels at background, except for the periods 2000-2100 hrs on 5/1, 1500-2000 hrs on 5/3, and 0700-0800 hrs on 5/4, when aerial measurements reported I-131 at MDA levels and ground survey readings were 0.034 to 0.04 mr/hr. During the period May 1-6, approximately 37 air samples were collected and all were less than MDA. Vegetation samples collected following the releases were all less than MDA.
EPA air and water samples collected during the period April 26 to May 3 showed no evidence ofifission products (0.1-0.2 picocuries per cubic meter I-131 for air, and 130 picocuries per liter I-131 for water).
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U IMMEDIATE PRELIMINARY NOTIFICATION s v J_ a S)
.b 7905140: 5a
e' Continued May 7, 1979 Page 2 PNO-79-67AM
Contact:
RCPaulus, IE x27246: DThompcon, IE, x28437 Distribution:
Transmitted H St 'rh+f Chaircian Hendrie Commissioner Bradford S. J. Chilk, SECY Comissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Coc :rissioner Gilinsky'JD (For Distribution)
Transmitted: MNBB JI P. Bldg IT'ik3 J. G. Davis, IE L. V. Gossich, EDO H. R. Denton, }3R Region I Eraf H. L. Ornstein, EDO R. C. DeYoung, NRR Region II M* M J. J. Fouchard, M R. J. Mattson, NRR Regica III ))'.34 N. M. Haller, HPA V. Stello, NRR Regica IV _ fi!3J R. G. Ryan, OSP R. S. Boyd, NRR Region V H. K. Shapar, ELD SS Bldg (MAIL)
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 - TMI-Information Center)
. White House Situation Room H)AA (Provide copies to the Administrator and the Operations Center)
EPA DOE /EOC PEHA BRP (State of PA)
DCPA HEW
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IMMEDIATE PRELIMINARY NOTIFICATION
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