ML19250B776
| ML19250B776 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/19/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 7911050220 | |
| Download: ML19250B776 (1) | |
Text
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UNITED STATES
[gaRic,
NUCLEAR REGULATORY COMMISSION O~
REGION IV E
o G11 RYAN PLAZA DRIVE, SUITE 1000
.::.J ARLINGTON, TEXAS 76012
[,
October 19, 1979 In Reply Refer To:
RIV Docket Nos.
50-445/IE Circular No. 79-21 50-446/IE Circular No. 79-21 Texas Utilities Generating Company ATTN:
Mr. R. J. Gary, Executive Vice President and General Manager 2001 Bryan Tower Dallas, Texas 75201 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, U.)
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Karl V. Seyfrit
]
Director
Enclosures:
1.
IE Circulars Issued in the Last Six Months 1271 132
(] 7911oso N
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 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 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 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 it(ms such as:
e Tank overflows should be routed to liquid radwaste tanks.
a.
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 which leakafe is expected.
e d.
Cotferdams should be installed under doors to areas with a potential for radioactive spills.
e.
Preoperational testing should
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that would permit radioactivi unit (s) under construction.
DUPLICATE DCCl#!ENT Entire document previously entered into system under:
- 4fif4/2f 12~/1 133
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