ML20207N514
| ML20207N514 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 10/13/1988 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20207N462 | List: |
| References | |
| NUDOCS 8810190192 | |
| Download: ML20207N514 (2) | |
Text
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LINITING CONDITION FOR OPERATION 3.6 PRIMARY SYSTEM BOUNDARY 1
1.
.SMtBIBji j
1.
During all modes of operation except COLD SHUTDOWN and REFUEL CONDITION, all safety related snubbers shall be OPERABLE.
i 2.
If a snuloer is determined to be inoperable, continued reactor 1
operation is permissible only during the 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> following such determination unless the snubber is sooner replaced, made OPERABLE, or an engineering evaluation determined the supported systeW component to be OPERABLE with the inoperable snubber, j
3, If the requirements of 3.6.1.1 and 3.6.1.2 cannot be met, an orderly shutdown shall be initiated and the reactor shall be in the COLO SHUTDOWN or REFUEL CONDITION within 36 nours, j
4.
If a snubber is determined to be inoperable while the reactor is in i
the COLD SHUTDOWN or REFUEL CONDITION, the snubber shall be made OPERABLE, or replaced, prior to reactor startup.
SURVEILLANCE REQUlkENENT 4.6 PRIMARY SYSTEM BOUNDARY 1.
SNUBBERS 1
i Each snubber shall be demnstrated OPERABLE by performance of the follow-ing augmented inservice inspection program.
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Visual Insoection I
All snubbers shall be visually inspected in accordance with the following schedule.
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- of Snubbers Found l
Inoperable During Inspection or During Next Required Inspection Interval Inspection Interval i
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18 months i 25%
1 12 months i 25%
2 6 months i 25%
3, 4 124 days i 25%
i 5,6,7 62 days i 25%
28 31 days i 25%
When the cause of the rejection of a snubber is clearly established and remedied for that snubber and for any other snubbers that may be i
generically susceptible, that snubber may be exempted from being 8810190192 801013 ADOCKOS00g5 DR Millstone Unit 1 3/4 6-15 Amendment No. 7, 15 t
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r SURVEILLANCE REQUIREMENT (Continued) t
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counted as inoperable.
Generically susceptible snubbers are those which are of a specific make or mods 1 and have the same design r
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features directly related to rejection of the snubber by visual i
1 inspection, or are similarly located or exposed to the same environ-mental conditions such as temperature, radiation, and vibration, i
The required inspection interval shall not be lengthened more than i
one step at a time.
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Snubbers may be categorized in two groups, mechanical and hydraulic.
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Each group may be divided into two subgroups; these accessible and t
those inaccessible during reactor operation.
Each group and i
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subgroup may be inspected independently in accordance with the above r
schedule.
L 2.
Visible insoection Acceotance Criteria i
i Visual inspections shall be conducted in the following manner-(a) in the case where the attachments to the foundation or support-ing structure are found to be insecure, the cause of the rejection i
shall be clearly established and remedied for that particular
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snubber and for other snubbers that may be generically susceptible (snubbers found to have insecure attachments to their foundation or t
supporting structure shall not be included in the table of 4.6.1.1 for determination of the next inspection interval); or (b) if there are visual indications of damage or impaired OPERABILITY, the affected snubber shall be tested in the as-found condition and, if L
i determined OPERABLE per specifications 4.6.1.4(a) or 4.6.I.4(b), as l
applicable, may be excluded from the number of snubbers counted as
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having failed the visual inspection, Snubbers which appeared a
inoperable as a retult of visual inspections may be determined OPERABLE for the purpose of establishing the next visual inspection t
interval provided that the above procedure is adhered to.
- However, j
i when the fluid port is found to be uncovered, the snubber shall be i
determined to be inoperable and cannot be determined operable via functional testing for the purpoacs of establishing the next visual inspection interval.
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Snubber Tests i
3.
At least once per eighteen (18) months, during shutdown, a represen-tative sample (10% of the total of each type of snubbers, mechanical I'
and hydraulic, in use in the plant) shall be tested either in place or in a bench test.
For each snubher that does not meet the test acceptance criteria of Specification 4.6.I.4(a) or 4.6.I.4(b), as applicable, an additional 5% of that type of snubber shall be r
tested.
Testing shall continue until no Idditional inoperable snubbers are
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found within a sample or until a'.1 snubbers have been tested.
The l
representative sample selected fw testing shall include the various configurations, the range of size and capacity of snubbers, and the l
operating environment of all snJbbers.
Millstone Unit 1 3/4 6-16 Amendment No. 15 i
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