ML18052A224

Proposed Tech Spec Changes,Increasing Acceptance Criteria for Mechanical Snubber Drag Force,Based on Mfg Confirmation of Appropriate Value

ML18052A224
Person / Time
Site:	Palisades
Issue date:	01/10/1986
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18052A222	List: ML18052A221 ML18052A223 ML18052A224
References
NUDOCS 8601140131
Download: ML18052A224 (2)

Text

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ATTACHMENT Consumers Power Company Palisades Plant Docket 50-255 PROPOSED TECHNICAL SPECIFICATION PAGE CHANGE January 10, 1986 8601140131' 860110 - . '**

PDR ADOCK:. 05000255 ..... '.l '*

1 Page P :_ _ PDR-IC0186-0007-NL04

d.

Hydraulic Snubbers Functional Test Acceptance Criteria The hydraulic snubber functional test shall verify that:

1. Activation (restraining action) is achieved within the specified range of velocity or acceleration in both tension and compression.

2. Snubber bleed, or release rate, where required, is within the specified range in compression or tension. For snubbers specifically required to not displace under continuous load, the ability of the snubber to withstand load without displacement shall be verified.

e. Mechanical Snubbers Functional Test Acceptance Criteria The mechanical snubber functional test shall verify that:

1. The force that initiates free movement of the snubber rod in either tension or compression is less than the specified maximum drag force (break away friction) which is equal to 2% of the rated load of the snubber.

I,

2. Activation (restraining action) is achieved within the specified range of velocity or acceleration in both tension and compression.

3. Snubber release rate, where required, is within the specified range in compression or tension. For snubbers specifically required not to displace under continuous load, the ability of the snubber to withstand load without displacement shall be verified.

f. Snubber Service Life Monitoring A record of the service life of each snubber, the date at which the designated service life commences and the installation and maintenance records on which the

.designated service life is based shall be maintained as required by Specification 6.10.2.1.

Concurrent with the first inservice visual inspection

. and a-t least once per 18 months thereafter, the installation and maintenance records for each snubber listed in Tables 3.20.1 and 3.20.2 shall be reviewed to verify that the indicated service life has not been exceeded or will not be exceeded prior to the next scheduled snubber service life review. If the indicated Proposed TSP0186-0007-NL04