ML20116F090
| ML20116F090 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 10/28/1992 |
| From: | Salter H CITIZEN'S RADIOLOGICAL MONITORING NETWORK, PILGRIM |
| To: | Bores R, Chilk S NRC, NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 9211100166 | |
| Download: ML20116F090 (3) | |
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11/0 M 2 15:49- U. 5' IL P. C. PEG 101 1: M it 1 002 jQL/f OI ' 92:14815' PILGRIM NRC RESIDENT P02 .i Gr. VP*
, Matt t 'ch utvo : 111- PV2 '112 42P*t 1 ' COMPLIANCEIC 1 s o; '-
, . - CITIZEN'S RADIOLOGICAL MONITORING NETWORX, FILCRIM INc. >
48 OLDFIELD DRIVE XINGSTON, MA88 ACHUSErrS 02M4 October 23, 1992 TO Mr. Samuel V. Chi 1X, D C.
Dr. Robert Bores, U.S.N.R.C.1ng U.S.H.R.C., K ofWashington Pruss1s,.-PA' Mr. Robert Hallissy, Mass. Dept. of Public Health Boston [MA .
Mr. George Davis, V. P., Doston-Edison Company, Pkynouth, MA
- Subjects liigher than normal.rsdiation levels in the Duxbury -
Kingston, Massachusetts area, Cotober 24 and.25, 1992.
aantlement This letter is to request additional information regarding activities involved with, and emissions released from the Pilgrim Nuclonr Pow: r Station, Plymouth, Massachusetts on the days of October 24 und October 25, 1992.
The renaon for the reque.st is that we+ experienced unusually high levels of radiation during those two days, and we are interested-in. finding a reasonable explanation for those levels.
All rour monitoring computera-that:We operate on a twenty-four hour basis had increason in the hourly counts-per-minute averages of more than three standerd deviations.- One computer-monitor showed hourly average incremnas of moreithant ten standard deviations, and one showed hourly average Anoreases or i -more than fourteen standard deviations. This should be: -
E statiutically improbable on a random Dasis. In two and one-half
! years or monltoring we have never recorded-Invels-of-more than--
l six standard devintione. ' Graphs of the hourly counts-per-minute t averagos are provided for your information.- We would be happy to go into the matter in greater detail, if you wish..
Further, we are aware that Pilgrim-was in'tho'processJof being shut down, and we are aware of the NRC; F; vent Reports- numbered -
24491-and 24494 that were submitted by Pilgrim to-the NRC:on
-October 24 -1992 (attached for your referanoo), warasXL 1 -if
-these even(s described in-the Reports were=related in.any('w)ay-to -
any emissions or other causes for the incroaned radiation,cand
-(2) if other monitora in.the area showed similar-increases in:
background radiation as we had.- on sunday morning,-October >25, we ostimate that the wind wan' light, apparently from the e a s t ,-
by north _eastt.there was light-intermittent rain. =Neither or those conditionsihave been' associated with-such very-high levels:
- of radiation-before.
L We would-appreciate your--responee-to thle inquiry at.your earliest convenienoa.- Thank you-in advance for i
-attention to this matter-and for your:providing.your prompt
-us-with the
-detailm.nncessary to-help _ explain-.these events. .
-Very1 ruly yours, -
pw -
Il rry,W.JG lter President -g Citizen's Radiciogical. Monitoring-Network, Pilgrim Inc. n :
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