ML19199A593
| ML19199A593 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/27/1979 |
| From: | Paulus R, Thompson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-79-067AH, PNO-79-67AH, NUDOCS 7905040296 | |
| Download: ML19199A593 (2) | |
Text
h IMMEDIATE ygg3 PRELIMINARY NOTIFICATION April 27 1979 FRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-79-67AH This preliminary notificatica constitutes summary ir formation of an event of safety or public intq_ rest significance.
The information presented is a s umma ry o f in fo rma ti on a s o f 7 : 00 a. m. on April 27, 1979.
Facility:
Three Mile Island Unit 2 Middletown, Pennsylvania (DN 50-320)
Subject:
NUCLEG INCIDENT AT THREE MILE ISLAhT Plant Status The average coolant te=perature is being maintained at 225 degrees F by admitting steam to the main condenser through the. turbine bypass valves.
The high-st incore te=perature reading is 310 degrees P.
Pressurizer level transmitter LT-3 became erratic over the period of 12:30 - 1:30 a.m. on April 27, but is now tracking again.
Calibrat ion of the Heise Gauge, to be used as a back-up pressuriner level measure-ment has been ceepleted.
Environmental Status No Aerial Measuring System (AMS) Surveys were made on April 26, 1979.
Iodine concentration at Unit 2 ventilation stack (analyzed by NRC Mobile Laboratory).
Date/ Time Activity (uCi/cc)
-8 4/26 (0016) - 4/26 (0357) 1.2 x 10 4/26 (0400) - 4/26 (0800) 1.1 x 10_g 4/26 (0805) - 4/26 (1220) 1.1 x 10_
4/26 (1220) - 4/26 (1558) 7.4 x 10,9 4/26 (1606) - 4/26 (1913) 1.4 x 10_gg 4/26 (1913) - 4/27 (0006) 1.4 x 10 Offsite Measurements Radiar. ion _ Levels
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t Offsite radiation levels identified by NRC survey teams continue to be consistent with natural background levels (0.02 mR/hr maximum).
These results were obtained from routine daily surveys performed downwind on the east and I
west sides of the Susquehaana River at distanc.es up te five miles notth and south of the site.
COVTIKUED IMMEDIATE PRELIMINARY NOTIFICATION 79050403-96
Continued April 27 1979 Page 2 PNO-79-67AH Dose rates (47 locations as ceasured 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.
NRC Environmental Sa=cles (Samples taken offsite within 3 miles of site _-
analyzed in mobile laboratorv)
Number of Sample Tvoc Date of Sample Sacml es Results air 4/26-27 7
Less than MDA*
daily air 4/25-26 1
Less than MDA rain wate:
4/26 1
Less than MDA EPA Environmental Sa=nles (Analyzed at Remote Laboratorv)
EPA reported orally that the air samples collected on 4/24 - 4/25 from the 31 sampling staticns were all less than MDA for I-131.
All EPA sa:ples were taken at distances greater than 2 miles from the site.
- TA - =ini=um detectable activity.
The Com:.cnwealth of Pennsylvania has been informed of these results.
Contact:
RCPaulus, LE 27246 DThompson, IE x27246 Distribution:
Transmitted H St /2N/fB Chairman Hendrie Coc=issioner Bradford S. J. Chilk, SECY Cc==issioner Eennedy Co=missioner Ahearne C. C. Kascerer, CA Cocmissioner Gilinsky (For Distribution)
Trans=itted:
MNEB /O.ctfD P. Bldg 3 M'2.-
J. G. Davis, IE L. V. Gossick, EDO H. R. Denton, NRR Region I 3*/ f H. L. Ornstein, EDO R. C. DeYoung, NRR Region II '
J. J. Fouchard, PA R. J. Mattson, NRR Region III N. M. Haller, MFA V. Stello, NFsR Region IV R. G. " fan, OSP R. S. Boyd, NPS Region V r
H. E. Shapar, ELD SS Bldg /ol: $.
(MAIL)
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W.
J. Dircks, NMSS J. J. Cummings, OIA
.7;33 S. levine, RES R. Minogue, SD IE (TMI) Site '"f-(Provide copy to STATE)
White House Situation Room
<d YW FDA4 (Provide copies to the Administrator and the Operations Center)
EPA D.' e*7 T(x.ce,t)4.m)
N DCE/EOC
- m. ha' ?EMA
(,. AM m ERP (State of PA) 7 -//40 p.
DCPAfC C "
%. YMHEW x
Handcarry (FAA) w-
-/W C. Ab ra ham, PA (Middletown Information Center)
M-IMMEDIATE PRELIMINARY NOTIFICATION
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