ML20204E832
| ML20204E832 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 10/14/1988 |
| From: | BALTIMORE GAS & ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20204E804 | List: |
| References | |
| NUDOCS 8810210458 | |
| Download: ML20204E832 (4) | |
Text
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PLANT SYSTEMS
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3/4.7.8 SilUBBERS LIMITING CONDITION FOR OPERATIOft l
3.7.8.1 All safety related snubbers shall be OPERABli.
l APPLICASILITY:
It0 DES 1, 2, 3 and 4.
(MODES 5 and 6 fo snubbers located on systems required OPERABLE in those MODES.)
ACTION:
e With one or no.re. snubbers inop rable, within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> replace or restore the inoperable snubber (s) to OPER LE status, and perform an engineering evalua-tion
- per Specification 4.7..b and c on the supported component or declare the supported system inoperable and follow the appropriate ACTION statement for
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that system.
SURVEILLANCE REQUIREMENTS 4.7.8.1 Each snubber shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program and the requirements of Specification 4.0.5.
As used in this Specification, type of snubber shall mean snubbers of the same design and manufacturer, irrespectivi cf capacity.
a.
Visual Inspections k
Visual inspections shall be perfomed in accordance with the following schedule:
No. Inopercble Snubbers of Subsequent Visual **
Each Type per Inspection Period Inspection Period #
0 18 months + 25%
1 12 months T 25%
2 6 months T 25%
7 3, 4 124 days 1 5%
5,6,7 62 days 1 25%
8 or more 31 days 1 25%
The snubbers may be further categorized into two groups: Those accessible and those inaccessible during reactor operation. Each group may be inspected independently in accordance with the above
- schedule, 1 Safety related snubbers include those snubbers installed on safety related eJ8 systems and snubbers on ncn-safety related systems if their failure or the
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failure of the system on which they are installed would have an adverse 3y effect on any safety related system.
A documented, visual inspection shall be sufficient to meet the requirements mo ex for an engineering evaluation. Additional analyses, as needed, shall be
$8 completed in a reasonable period of time.
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- The inspection interval shall not be lengthened more than two steps at a time.
Se i The provisions of Specification 4.0.2 are not applicable.
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CALVERT CLIFFS - UNIT 2 3/4 7-25 Amendment No. 10.4.100, 106
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PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) b.
Visual inspection Acceptance Criteria Visual inspections shall verify (1) that there are no visible indica-tions of damage or impaired OPERABILITY, and (2) that the snubber installation exhibits no visual indications of detachment from foundations or supporting structures. Snubbers which appear inoper-able as a result of visual inspections may be detemined OPERABLE for the purpose of establishing the next visual inspection interval, providing that (1) the.cause of the rejection is clearly established arid remedied for that particular snubber and for other snubbers that may be generically suscen.tible; and/or (2) the affected snubber is functionally tested in the as found condition and determined OPERABLE per Specification 4.7.
"d, as applicable. When the fluid port of a hydraulic :nubber is f und to be uncovered, the snubber shall be determined inoperable u less it can be determined OPERABLE via functional testing for the p pose of establishing the next visual inspection interval.
For the snubber (s) found inoperable, an engineering evaluation shall be perfonned on the component (s) which are supported by the snubber (s).
'ae scope of this engineering evaluation shall be consistent with the licensee's engineering judgment and may)be
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limited to a visual inspection of the supported component (s.
j The purpose of this engineering evaluation shall be to determine if the component (s) supported by the snubber (s) were adversely affected by the inoperability of the snubber (s) in order to ensure that the supported component remains capable of meeting the designed
- service, c.
Functional 'ests V
At least once per 18 months during s tdown, a representative sample of 10% of each type of snubb s in use in the plant shall l
be functionally tested either in ace or in a bench tett.* For each snubber that does not meet he functional test acceptance criteria of Specification 4.7.8.d an additional 5% of that type l
snubber shall be functionally tested until no more failures are found or until all snubbers of that type have been functionally l
tested.
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CALVERT CLIFFS - UNIT 2 3/4 7-26 Amendment No.10.JE,ff,73 10 c
' PLANT SYSTEMS SURVElllANCE REQUIREMENTS (Continued) snubbers identified as "Especially Difficult to Remove" or in "High Radiation Zones" shall also be included in the representative sample.*
In addition to the regular sample, snubbers which failed the previous functional test shall be retested during the next test period.
If a spare snubber has been installed in place of a failed snubber, then both the failed snubber (if it is repaired and installed in another position) and the spar:
Aber shall be retested during the next test period.
Failure of these,.. bbers shall not entail functional testing of addit ~ional snubbers.
If any snubber selected for functional 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 or design deficiency all generically susceptible snubbers of the same design subject to the same defect shall be functionally tested. This testing requirement shall be independent of the requirements stated above for snubbers not meeting the functional test acceptance criteria.
For the snubber (s) found inoperable, an engineering ev'aluation shall be performed on the component (s) which ere supported by the snubber (s).
The scope of this engineering evaluation shall be consistent with the licensee's engineering judgment and may be limited to a visual inspec-tion of the supported component (s). The purpose of this enginetring -
evaluation shall be to determine if the component (s) supported by the snubber (s) were adversely affected by the inoperability of the snubber (s) in order to ensure that the supported component remains capable of meeting the designed service.
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.
- Permanent or other exemptions from functional testing for individual snubbers in these categories may be granted by the Commission only if a justifiable basis for exemption is presented and/or snubber life destructive testing was performed to qualify snubber operability for all design conditions at either the completion of their fabrication or at a subsequent date.
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CALVERT CLIFFS - UNIT 2 3/4 7-26a Amendment No, M, /g,106
I PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) l j
e.
Snubber Service Life Monitoring i
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A record of the service life of each snubber, the date at which the i
designated service life commences and the installation and maintenance records on which the designated service life is based shall be main-tained as required by Specification 6.10.2.m.
At least once per 18 months, the installation and maintenance records l
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' for each safety related snubber shall be reviewed to verify that the i
indicated service life has not been exceeded or will not be exceeded j
prior to the next scheduled snubber service life review
- If the l
indicated service life will be exceeded prior to the next scheduled snubber service life review, the snubber service life shall be re-evaluated or the snubber shall be replaced or reconditioned so as to l
extend its service life beyond the date of the next scheduled service i
life review.
This reevaluation replacement e.,r reconditioning shall l
be indicated in the records.
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- The provisions of Specification 4.0.2 are applicable.
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I CALVERT CLIFFS - UNIT 2 3/4 7-26b Amendment No. 38./6.73.106 1
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