ML19325F336
| 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) | |
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j ' CITIZEN'S MONITORINGRADIOLOGICAL NETWORK / f/M' I *
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2150MMER STRIIT
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DUX6URY, MA 02332 T
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l October 8, 1989 y cQeark AM ft v<.J . ,
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2-Thomas Elsasser, Technical Advisor to Chairman Cart US Nuclear Regulatory Commission 16 G 15, Washington, DC 200551 l
!
Report of prolonged excessive radiation readings on 10/26'/89. ,
- The evening of September 26, 1989 was our quarterly Quality Assurance Meeting. Members of our network gather to test our monitors in a
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 #397 - "" " - 3210tc = ll.22 cpm.
- 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 at made 21 Summer in the following manner: The location, 10 miles from Pilgrim I,
- Street, in the Town of Duxbury, MA, at the intersection of Summer and South Streets. This intersection is referred to as Tree of Knowledge
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Corner on local maps.
All Radalerts were positioned at an open The conditions of the test:
window, leaning against a screen. Previous tests have shown that the 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 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 />. Since I .
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L had in my possession 8 Radalerts, I immediately employed them to certify the readings of $366 and 10.
1 .-
, 9/26/89 - 9:17am.
1366 - 30 mins. - 410tc = 13.67 cpm.
Ip l
<i 1353
" " - 4 31 tc = 14. 3 7 cpm.
1354
" " - 4 34 tc = 14.4 7 cpm.
1397
" " - 418tc = 13.93 cpm.
l G91120o156 892cos
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- 373
" " - 40ltc.= 13.37 cpm. '
- 415
"' " - 429tc = 14.30 cpm.
,
- 0
" "- - 1318tc = 43.93 cpm. -
,
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9/26/69 - 10:27am. !
9366 - 30 mins. - 412tc = 13.73 cpm.
.
l
" "' - 410tc = 13.67 cpm.
- 353 !
0354
" " - 353tc = 11.77 cpm. >
" " '- 418tc = 13.93 cpm.
0373' i
" " - 432tc = 14.40 cpm.
- 397 ,
,0415 "- " - 429tc = 14.30 cpm. l
" " - 431tc = 14.37 cpm.
- 452 i
- 1226tc = 40.87 cpm.
,
" "
60 ;
l I reported these findings to HeCharles called Marshall, back laterthe on Resident and NRCthat a reported l
,
Inspector of Pilgrim I.
check of the stack and vent monitors at the p lant reveal ed no abnormal l i
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 :
j rain shower. Several of our monitors recorded over double background Wind reported as southeast, j 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 />. i I am aware.that the above elevated readings are modest, but we do ;
record similar readings, at various times of day, for shorter periods
<
i almost daily. . Modern medical opinion deems any increase-in background
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as possibly injurious to health. t
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3 Please advise.
,
Re pectful}y bmitted, l
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l 0- i David L. Quaid, Citizen's Radiological Monitoring Network.
cc: Mass. Depts. Public Health, Public Safety, Civil Defense.
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J Carl O'Neill, Town of Duxbury CD.
Charles Marshall. MUC. ;
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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.
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C:#n8) signed By: Walter J. Pascsk Walter J. Pasciak, Ph. D., Chief Effluents Radiation Protection Section Facilities Radiological Safety and Safeguards Branch
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