ML20128B386
| ML20128B386 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 04/21/1972 |
| From: | Fiorelli G US ATOMIC ENERGY COMMISSION (AEC) |
| To: | James Keppler US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20128B298 | List: |
| References | |
| NUDOCS 9212030642 | |
| Download: ML20128B386 (2) | |
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ATOMIC ENERGY COMMISSION W ASHINGTON, D C 20S45 l
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April 21, 1972
%n J. G. Keppler, Chief, Reactor Testing and Operations Branch Division of Compliance, Headquarters NORTHERN STATES POWER COMPANY LICENSE NO. DPR-22 MONTICELLO HIGH READINGS ON ENVIRONMENTAL THERM 0 LUMINESCENT DOSIMETERS The attached inquiry report describes the results of three TLD readings at Monticello for the period March-21, 1972, through April 18, 1972.
Readings other than those listed are presumed to be normal. NSP is continuing their review of operating records and intends to prepare a summary of operating data, release rates, and wind directions for the period covered by the TLD measurements, which we will review. The Minnesota Public Health Department employee who processed the dosimeters has indicated to Mr. Larson that he suspects there is a possibility that the TLD's may have been exposed to a source. Our principal inspector and Radiation Specialist will be at the site on April 21 to review operating information and collect environmental and gas effluent samples.
We will keep you informed of developments.
Caston Fiore111 Senior Reactor Inspector
Attachment:
C0 Inquiry Rpt No. 050-263/72-06 (2 cys) cci E. G. Case, DRS (3)
R. S. Boyd, DRL (2)
R. C. DeYoung, DRL (2)
D. J. Skovholt, DRL (3)
H. R. Denton, DRL (2)
L. Kornblith, CO R. H. Engelken, CO CO Files g Central Files 2 0G27 9212030642 720421 PDR ADOCK 05000263 D-PDR
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O' U. S. ATOMIC ENERGY COMMISSION
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DIVISION OF COMPLIANCE REGION III-i I~
CO Inquiry 5eport No. 050-263/72-06 1
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Subject:
Northern States Power Company
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License No. DPR-22 i
Monticello j
High Readings on Environmental Thermoluminescent Dosimeters l-l Prepared By:
K. V. Seyfrit April 21, 1972 1
A.
Date and Manner AEC was Informed:
1 Mr. C. Larson, Plant Superintendent, telephoned Region III on 1
April 20, 1972.
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B.
Description of Particular Event or Circumstance:
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Thermoluminescent dosimeter readings in. a northeasterly direction from the Monticello reactor were found to read as follows:
d 12 miles from site 30 mr (10 mr normal-reading) 7-8 miles from. site 23;mr i
Site boundary
-15 mr The readings cover a period of one month (March 21 - April 18, 1972) l and were processed by the Minnesota Public Health Department.
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Action by Licensee:
i The licensee has examined the records of wind direction and ef fluent-discharge rates, and' can find no indAcation that such readings could j
be reactor'related. Mr. D. Gray of 2 the hunnesota Public' Health j
Department has also reviewed records at the site and reached the l-same conclusion.
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