ML19273B814
| ML19273B814 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 05/08/1979 |
| From: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Humphreys L GULF STATES UTILITIES CO. |
| References | |
| NUDOCS 7906180152 | |
| Download: ML19273B814 (1) | |
Text
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May 8, 1979 Docket No. 50-458 50-459 Gulf States Utilities ATTN: Mr. L. L. Humphreys, Senior Vice President, Energy Development Post Office Box 2951 Beaumont, Texas 77704 Gentlemen:
Enclosed is supplement AM to Preliminary Notification PNO-79-67, "duclear Incident at Three Mile Island," dated May 7,1979.
Should you have any questions regarding this review, please contact this office.
Sincerely, b
W. C. Sei'dle, Chief ReactorC(nAtructionand Engineering Support Branch
Enclosure:
PN0-79-67AM 7006180/f,7
IMMEDIATE fh24hd PRELIMINARY NOTIFTCATION May 7 1979 PRELIMINARY NOTIFICATION OF AN EVENT OR UNUSUAL OCCURRENCE - PNO-79-67AM This preliminary notification provides undated information of safety or public interest significance.
Facility: Three Mile Island Unit 2 Middletown, Pennsylvania
Subject:
NUCLEAR INCIDENT AT THREE MILE ISLAND Operational Status:
1.
Three of four trains of an independent, additional charcoal filter system are presently in operation.
Iodine 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.
Measurement of the liquid level inside containment is planned in the future by mcoeuring the hydrubLatit Leod ou the sump discnarge near piping using a recently installed Heise gage.
5.
A measurement 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/hr.
nrhar radiation ooureco such -.
activity depcsited 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 levels. 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 of afission products (0.1-0.2 picoeuries per cubic meter I-131 for air, and 130 picoeuries per liter I-131 for water).
m n n o n n g n ca r, CONTINUED J'[slulPll lllJ6\\ !
b J 'G Td 'l IMMEDIATE PRELIMINARY NOTIFICATION u
7905140253
s Continue'd May 7, 1979 Page 2 PNO-79-67AM
Contact:
RCPaulus, It x27246 DThompcon, IE, x28437 Distribution:
Transmitted H St 4 Mi Chaircan Hendrie Commissioner Bradford S. J. Chilk, SECY Co=missioner Kennedy Commissioner Ahearne C. C. Kammerer, CA (For Distribution)
Coccissioner Gilinsky'zo Transmitted:
MNBB JI.
P. Bldg TCf6 J. G. Davis,6IE L. V. Gossick, EDO H. R. Denton, NRR Region I 44 H. L. Ornstein, EDO R. C. DeYoung, NRR Region II M*1df J. J. Youchard, PA R. J. Mattson, NRR Region III E L N. M. Haller, HPA V. Stello, NRR Region IV _ ti;3J R. G. Ryan, OSP R. S. Boyd, NRR Region V H. K. Shapar, ELD SS Bldg (MAIL)
W. J. Dircks, NMSS J. J. Cun:mings, OIA S. Levine, RES R. Minogue, SD IE (TMI) Site (Provide copy to STATE)
C. Abraham, PA (Middletown - TMI-Information Center)
-White liouse Situation Room FDAA (Provide copies to the Administrator and the Operations Center)
EPA DOE /EOC PEMA BRP (State of PA)
DCPA HEV Handenerv (FAA)
IMMEDIATE PRELIMINARY NOTIFICATION
.