ML19320C674
| ML19320C674 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/03/1980 |
| From: | Jay Collins, Conte R, Shanbaky M Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| PNO-TMI-80-038C, PNO-TMI-80-38C, NUDOCS 8007170547 | |
| Download: ML19320C674 (1) | |
Text
PRELIlill JY l40TIFiCMISN July 3,19c0 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL CGNCURRENCE--PNO-TMI-80-38C This preliminary notification constitutes EARLY notice of even,ts_of POSSIBLE safety or Dublic interest sicnificance. Tile information cresented is as initially received o thcjli, verification or evaluation and is basically all that is known by NRC staff cn this date.
Facility: Metropolitan Edison Company Three Mile Island, Unit 2 Middletown, Pennsylvania Docket Number 50-320
Subject:
REACTOR BUILDING PURGE STATUS Purging of the reactor building atmosphere utilizing the modified hydrogen control (MHC) system continued at various system flow rates based on meteorological condition.
Momenta ry snut::cwns also occurred due to e tack monitor filter changeouts.
An unscheduled shutdown et 5:46 a.m. occurred due to the ' is of the sample pump for the effluent monitor (HP-R-219A)
A replacement pumo nas been inst: ' as of 8:30 a.m. anc purging resumed at that time.
Maximum purge system flow rat:..
- imately 540 cfm while stack flow rate averaged dpproximately 100,000 cfm in ths.
.ours.
Total calculated radioactivity released as of 7:00 a.m. was 14,346 Ci based on stack flcs rate and measured stack concentration.
Remaining concentration in the reactor building based on the last building sample was analyzed at 0.72 uCi/cc (40,781 C1, total).
An additional monitor, consisting of a 3X3 inch scdium iodide crystal detector installed in the plant stack sample line, is providing signals to a miti channel analyzer where sc-C5 ga=a signals are distinguished from other potential isotope, in particular cessium 137 T.his new monitor is being used as backup to tne olant effluent monitor (HP-R-Zl9M with asscci:t:d filter sample analyses.
The sample ar.alysis recuires tne removal of.V-e-fi9A particulate filter, once per day, for spectral analysis to identify any porticula:e activi:y indication. All releases were made in accordance witn the Comiission orcer, the Tecnnical Specifications and the licensee's procedures.
Additional reports on reactor building purging will be updated on a daily basis tring the initial stages of purging.
The NRC Region I mobile lat.cratory will continue to be used to verify the licensee's analytical results.
Media interest has occurred because of public sensitivity to this evolution ena TMI relatec events. The Cormionwealth of Pennsylvania has nonitored these events.
NRC has responded to inquiries. The NRC TMI Program Office staff has monitored events as they occur on a 24 hoar basis.
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This infomation is curren as of 'l:30 a.m.
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Contact:
R. J. Conte 590.950 M. M. Shanbaky 590-3950
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asano 590-3950 J. T." Collins 590-3955 D"*D
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