ML19250C135
| ML19250C135 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 10/19/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Groce R VERMONT YANKEE NUCLEAR POWER CORP. |
| References | |
| NUDOCS 7911080272 | |
| Download: ML19250C135 (1) | |
Text
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UNITED STATES
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, r gy i NUCLEAR REGULATORY COMMISSION 3-V 2
REGION I o, '**d
'I 631 PARK AVENUE
,e KING OF PRUSSIA, PENNSYLVANIA 19406 Docket No. 50-271 0E Vermont Yankei! Nuclear Power Corporation ATTN:
Mr. Robert H. Groce Licensing Engineer 20 Turnpike Road Westborough, Massachusetts 01581 Gentlemen:
Enclosed is IE Circular No. 79-21, " Prevention of Unplanned Releases of Radioactivity." which provides information on inadvertent releases /on-site spills of radioactivity.
Should you have any questions related to the enclosed suggested preventive measures, please contact this office.
Sincerely,
%w177. fldw yce H. Grier Director
Enclosures:
1.
IE Circular No. 79-21 2.
List of IE Circulars Issued in the Last Six Months cc w/encls:
W. F. Conway, Plant Superintendent Ms. J. Abbey, Technical Secretary 1274 233 7911 080 1
1 ENCLOSURE 1 Accession No.:
7908220128 SSINS:
6830 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 October 19, 1979 IE Circular No. 79-21 PREVENTION OF UNPLANNED RELEASES OF RADI0 ACTIVITY Numerous incidents of unplanned releases of radioactivity have been reported to the NRC within the past few months.
These incidents of leaks, overflows and spills have resulted in contamination of areas outside of plant buildings.
The attached table provides you with summary information on these events, their apparent causes, the radiological consequences and the corrective actions.
We believe that a number of these incidents could have been avoided and preven-tive actions for these types of unplanned releases should be instituted by all reactor licensees.
Based on the reported incidents, the following preventive measures can minimize the occurrence of such events.
1.
Review er procedures for transfer of radioactive liquids.
Errors in written procedures have led to mistakes in valve line-ups and tank overflow. Written procedures, including check lists for valve line-ups, should be developed and followed for operations which could cause spills of radioactivity.
Management controls, including audits, should be employed to assure verbatim compliance with such procedures.
2.
Review of "as built" systems having the potential of inadvertent releases because of design or construction errors.
Consider items such as:
a.
Tank overflows should be routed to liquid radwaste tanks.
b.
Storm drains should be located away from areas with a high potential for spills.
Consideration should be given to drip pans under equipment, such c.
as pumps and valves, from u.ich leakage is expected.
d.
Cofferdams should be installed under doors to areas with a potential for radioactive spills.
e.
Preoperational testing shou' that would permit radioactii unit (s) under construction.
DUPLICATE DOCUMENT 3.
Periodically functionally test a Entire document previously of systems that could cause an i entered into system under:
corrosion degradation have occur
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