ML19319D833
| ML19319D833 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 08/10/1974 |
| From: | Book H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Thornburg H US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19319D834 | List: |
| References | |
| NUDOCS 8003250822 | |
| Download: ML19319D833 (1) | |
See also: IR 05000312/1974004
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H. D. Thornburg, Chief, Field Support & Enforcement Branch
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Directorate of Regulatory Operations, HQ
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SACRAMENTO MUNICIPAL UTILITY DISTRICT (RANCHO SECO)
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DOCKET NO. 50-312
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The attached radiological report by our field inspector of visits to the
subject facility on May 21-22 and June 10-11 and 19-20, 1974 is forwarded
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for information. No violations of AEC requirements were identified
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within the scope of the inspection.
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The observation of the testing of a HEPA filter with DOP ?.m.; ;ad that
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silicone sealant was used to eliminate small leakage (leus than 171
around the filter. We note that in C.S.b of Regulatory Guide 1.52, the
use of silicone sealants or any other temporary patching material on
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filters, housing, mounting frames, or ducts should be prohibited."
Unless there are some chemical charais2ristics of the s:,11 cone sealant
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that would effect the filter, we believe that use of this type of
sealant would be acceptable to reduce the leakage by an amount of less
than or equal to 1% in order to peet the acceptance cri:eria. The
licensee would be expected to evaluate the use of such sealant where
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unusual tempe: ature and atmosphc.ric conditions might exist.
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H. E. Book, Ch.'.ef
Radiological and
Environmental Protection Br.
Enclosure:
RO Inspection Report
No. 50-312/74-04-
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cc w/ enclosure:
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DR Central Files
Regulatory Standards (3)
Directorate of Licensing (13)
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