ML19250C325
| ML19250C325 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 10/19/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Boyer V PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 7911230216 | |
| Download: ML19250C325 (1) | |
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,o KING OF PRUSSIA, PENNSYLVANIA 19406 Docket Nos. 50-352 50-353 OUI 19IU3 Philadelphia Electric Company A1TN: fir. V. S. Boyer Vice President Engineering and Research 2301 Market Street Philadelphia, PA 19101 Gentlemen:
Enclosed is IE Circular No. 79-21, " Prevention of Unplanned Releases of Radioactivity," which provides inf m tion 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, N.
SW o ce H. Grier 1 rector
Enclosures:
1.
IE Circular No. 79-21 2.
List of IE Circulars Issued in the Last Six Months 1588 101 7 91123 01l b
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 RADIOACTIVITY 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 contamiration 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 rollowing 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:
Tank overflows should be routed to liquid radwaste tanks.
a.
b.
Storm drains should be located away from areac with a high potential for spills.
Consideration should be given to drip pans under equipment, such c.
as pumps and valves, from which leakage is expected.
d.
Cofferdams should be installed under doors to areas with a potential for radioactive spills.
] 3 g g l [ e. Preoperational testing shoul that would permit radioactiv unit (s) under construction. DUPLICATE DOCUMENT 3. Periodically functionally test an of systems that could cause an in Entire document previously corrosion degradation have occurr entered into system under: to cause leaks. New permanent an ] { /g No. of pages:}}