ML20151Q657
| ML20151Q657 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/02/1988 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20151Q654 | List: |
| References | |
| TAC-69038, NUDOCS 8808110242 | |
| Download: ML20151Q657 (1) | |
Text
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i PLANT SYSTEMS j
SURVEILLANCE REQUIREMENTS (Continued) l c.
Snubber Tests At least once per eighteen (18) months during shutdown, a representative sample (10% of the total of each type of snubber, mechanical and hydrau-lic, except steam generator hydraulic snubbers in use in the plant) shall j
be tested either in place or in a bench test. For each snubber that does
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not meet the test acceptance criteria of Specification 4.7.8.1d or 4.7.8.le, as applicable, an additional 5% of that type of snubber shall be tested.
Testing shall continue until no additional inoperable snubbers are found within a sample or until all snubbers in Tables 3.7-la and 3.7.1-b have been tested.
The representative sample selected for testing shall i
include the various configurations, and the range of size and capacity of snubbers.
Snubbers identified in Tables 3.7-la and 3.7-lb as "Especially Difficult to Remove" or in "High Radiation Zones During Shutdown" shall also be included in the representative sample.* Tables 3.7-la and 3.7-lb may be used jointly or separately as the basis for the sampling plan.
In addition to the regular sample, in locations where snubbers had failed the previous test due to operational or environmental conditions (exces-sive vibration, water hammer, high radiation, extreme heat or humidity, etc.), the snubbers currently installed in these locations shall be tested during the next test period.
Test results of these snubbers may not be included for the resampling.
All replacement snubbers shall have been tested prior to installation.
All steam generator hydraulic snubbers shall be tested and refurbished every seven years or less in accordance with the preventative maintenance program, in lieu of the functional test requirements of this specifica-tion.
If any snubber selected for testing either fails to lock-up or fails to move (i.e., frozen in place), the cause will be evaluated and if caused by manufacturer design deficiency, all snubbers of the same design subject to the same defect shall be tested regardless of location or difficulty of removal.
This testing requirement shall be independent of i
the requirements stated above for snubbers not meeting the test accep-tance criteria.
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- Permanent or other exemptions from functional testing for individual snubbers in these categories may be granted by the Commission only if a jcstifiable basis for exemption is presented.
l 8808110242 880802
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i PDR ADOCK 05000336 P
PNU MILLSTONE - UNIT 2 3/4 7-22 Amendment Nos. JJ, /J, A2, SE, JJE
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