ML19250B775
| ML19250B775 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 10/19/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Millen C PUBLIC SERVICE CO. OF COLORADO |
| References | |
| NUDOCS 7911050219 | |
| Download: ML19250B775 (1) | |
Text
CENTRAL FILES PDR:HQ
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UNITED STATES
,p" "'coq'o, NUCLEAR REGULATORY COMMISSION C
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October 19, 1979 Docket No. 50-267 Public Service Company of Colorado ATTN:
Mr. C. K. Millen Senior Vice President P. O. Box 840 Denver, Colorado 80201 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, C
ML Karl V. Seyfrit i
Director
Enclosures:
1.
IE Circulars Issued in the Last Six Months cc:
D. W. Warembourg, Nuclear Production Manager Fort St. Vrain Nuclear Station P. O. Box 368 Plattevilla, Colorado 80651 L. Brey, Manager, Quality Assurance 1271 130 119 7911050
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Accession No.: 7908220128 SSINS:
6830 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Circular No. 79-21 Date: October 19, 1979 Page 1 of 2 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 everts, their apparent causes, the radiological consequences and the corrective actions.
We believe that a number of these incidents could hcve 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 of procedures for transfer of radioactive liquids. Errors in written procedures ~have led to mistakes in valve line-ups and tank overflows. 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.
c.
Consideration should be given to drip pans under equipment, such as pumps and valves, from which leakage is expected.
d.
Cofferdams should be installed under doors to areas with a potential for radioactive spills.
Preoperational testing shoul e.
that would permit radioactiv unit (s) under construction.
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