ML19341C719
| ML19341C719 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 02/13/1981 |
| From: | Crews J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| Shared Package | |
| ML19341C720 | List: |
| References | |
| NUDOCS 8103040007 | |
| Download: ML19341C719 (2) | |
See also: IR 05000312/1980035
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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REGION V
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1990 N. CALIFORNIA BOULEVARD
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SUITE 202, WALNUT CREEK PLAZA
WALNUT CREE K. CAllFORNIA 94508
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Docket No. 50-312
Sacramento Municipal Utility District
P. O. Box 15830
Sacramento, California 95813
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Attention: Mr. John J. Mattimoe
Assistant General Manager
and Chief Engineer
Gentlemen:
Thank you for your letter dated January 26, 1981, informing us of the steps
you have taken to correct the items which we brought to your attention in
our letter dated January 8, 1981. Your corrective actions with regard to
the items described in the Notice of Violation (Appendix A to our letter)
will be verified during a future inspection.
Your response to the Notice of Deviation (Appendix B to our letter), while
addressing most of our concerns regarding acceptance limits for snubber
visual inspection, does not, however, address one important condition
identified during the recent inspection and at the exit meeting. This is
the condition where the snubber fluid level is extremely low such that the
reservoir is completely empty (Grinnell type snubbers) or the indicator rod
is not visible (Bergen-Paterson type snubbers). For this condition, it is
our position that such a snubber is inoperable within the meaning of Technical Specification 3.12 until a functional test has demonstrated its operability
and the snubber has been reinstalled, or until an operable replacement of
appropriate design has been installed. The reason we assume such a snubber
to be functionally inoperable is because of the possible entry of air into
the operating cylinder.
Whether the snubber is inoperable for the purpose of determining the visual
inspection interval would depend upon the results of the functional testing
and when it was performed:
If it were determined by functional testing to
be fully operable in the "as found" condition, it would not have to be defined
as inoperable for the purpose of determining the visual inspection interval.
Conversely, if operability were established by functional testing following
any alteration of the "as found" condition, the snubber would be considered
inoperable for the purpose of determining the visual inspection interval.
In either case, however, as stated above, if the snubber reservoir is empty
8.103040007
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Sacramento Municipal Uti?ity District
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or the indicator rod is not visible it is our position that the snubber is
inoperable within the meaning of Technical Specification 3.12 until a
functional test has demonstrated its operability and it has been reinstalled
or an operable replacement of appropriate design has been installed.
Accordingly, with regard to the Notice of Deviation which was initially sent
to you on January 8,1980, please provide to this office within ten days
of receipt of this letter a revised response which incorporates appropriate
acceptance limits for snubbers where visual examination reveals an empty
reservoir or where the indicator rod is off-scale.
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Should you have any questions concerning this letter, we will be glad to
discuss them with you.
Si cerely,
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J L
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Reactor perations and Nuclear
Support Branch
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