ML19325F336

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Provides Rept of Prolonged Excessive Radiation Readings Taken Near Plant on 890926.Stack & Vent Monitors at Plant Revealed No Abnormal Releases.Concern Expressed Increase of Background Being Injurous to Health.Graphs Encl
ML19325F336
Person / Time
Site: Pilgrim
Issue date: 10/08/1989
From: Quaid D
CITIZEN'S RADIOLOGICAL MONITORING NETWORK, PILGRIM
To: Elsasser T
NRC COMMISSION (OCM)
References
NUDOCS 8911200156
Download: ML19325F336 (45)


Text

CITIZEN'S RADIOLOGICAL f/M' I j

('

MONITORING NETWORK /

2150MMER STRIIT T

DUX6URY, MA 02332 dCm A

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]

y cQeark AM ft v<.J.

l October 8, 1989 2-Thomas Elsasser, Technical Advisor to Chairman Cart US Nuclear Regulatory Commission 16 G 15, Washington, DC 200551 Report of prolonged excessive radiation readings on 10/26'/89.

l The evening of September 26, 1989 was our quarterly Quality Assurance Members of our network gather to test our monitors in a Meeting.

batch for accuracy in reporting Beta and for total background i

radiation response.

On the 24th, and 25th., members who could not be l

present at the formal meeting (school openhouses, etc.) dropped their h

instrumpnts off so that their Radalerts could be tested with the group i

on.the' evening of the 26th..

On the 25th., I ran a preliminary comparative test on those instruments that had been collected todate.

Quality Assurance - 8:55am/1:41pm - 9/25/89.

6366 - 286 min. - 3222tc = 11.25 cpm.

1

  1. 397 -

- 3210tc = ll.22 cpm.

  1. 373 -

- 3090tc = 10.80 cpm.

1354 - 293 min. - 3245tc = 11.07 cpm.

60

- 286 min. - 8153tc = 28.50 cpm.

6366 is my own Radalert with a standard G/M tube, 80 is a protype

" pancake" G/M tube monitor.

The above figures are typical of normal radiation readings made in the following manner:

The location, 10 miles from Pilgrim I, at 21 Summer Street, in the Town of Duxbury, MA, at the intersection of Summer and This intersection is referred to as Tree of Knowledge South Streets.

Corner on local maps.

The conditions of the test:

All Radalerts were positioned at an open leaning against a screen.

Previous tests have shown that the

window, window screen material deflects approximately 2.5 cpm had the test been made out of doors.

Since the following data was gathered at precisely the same place and in the identical manner as the test above this factor is ignored.

On the morning of 9/26/89, at 7:29am, that entry in my work sheet jumped abuptly from the previous entry.

See copy of work sheet enclosed.

Radalert 1366 and pancake 80 recorded readings Since I approximately 27% above background for a period of 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br />.

L had in my possession 8 Radalerts, I immediately employed them to certify the readings of $366 and 10.

1 Ip 9/26/89 - 9:17am.

l 1366 - 30 mins. - 410tc = 13.67 cpm.

<i 1353

- 4 31 tc = 14. 3 7 cpm.

1354

- 4 34 tc = 14.4 7 cpm.

1397

- 418tc = 13.93 cpm.

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  1. 373

- 40ltc.= 13.37 cpm.

  1. 415

- 429tc = 14.30 cpm.

- 1318tc = 43.93 cpm.

  1. 0

.o 9/26/69 - 10:27am.

9366 - 30 mins. - 412tc = 13.73 cpm.

l

- 410tc = 13.67 cpm.

  1. 353 0354

- 353tc = 11.77 cpm.

418tc = 13.93 cpm.

i 0373'

  1. 397

- 432tc = 14.40 cpm.

,0415

- 429tc = 14.30 cpm.

l

  1. 452

- 431tc = 14.37 cpm.

i

- 1226tc = 40.87 cpm.

60 l

I reported these findings to Charles Marshall, the Resident NRC Inspector of Pilgrim I.

He called back later on and reported that a l

l l d no abnormal i

check of the stack and vent monitors at the p ant revea e releases.

The readings for 9/27/89 are more typical of what experience has shown us to be normal.

'i Enclosed for your interest is our computer graph of the elevated readings recorded the evening,of 7/10/89 during a brief torrential Several of our monitors recorded over double background j

rain shower.

readings for a period of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

Wind reported as southeast, j

i but we do I am aware.that the above elevated readings are modest, record similar readings, at various times of day, for shorter periods

. Modern medical opinion deems any increase-in background i

almost daily.

)

as possibly injurious to health.

\\

t Please advise.

3 Re pectful}y

bmitted,

/

~U.

e 0-i David L. Quaid, Citizen's Radiological Monitoring Network.

Mass. Depts. Public Health, Public Safety, Civil Defense.

J cc: Carl O'Neill, Town of Duxbury CD.

Charles Marshall.

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  1. 13
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  1. 19 2
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  1. 31 j-10-2-89 SHT 7 i

s L,-

k o MAR 3 01;gg Mr. David L. Quaid 21 Summer Street Duxbury, Massachusetts 02332

Dear Mr. Quaid:

I Thank you for the information you sent in your transmittal postmarked February 18, 1989. For your infomation, I have been designated as the appropriate NRC individual for receipt of information of this type. I will keep it on file in Region I and will also ensure it is entered into the Public Document Files. As ! indicated to you in our esrlier telephone call, I have responsibility for the operation of the NRC TLD Direct Radiation Monitoring Network. If you have Questions regarding that network relative to your own monitoring program, please feel free to call me (215) 337-5281. C:#n8) signed By: Walter J. Pascsk Walter J. Pasciak, Ph. D., Chief Effluents Radiation Protection Section Facilities Radiological Safety and Safeguards Branch ((06 0FFICIAL RECORD COPY f \\ >C. 1., _ _, vm g I ()Q(3 l' O.. ~ ,}}