ML20137H557

Proposed Tech Spec Changes Re Inservice Insp Surveillance Requirements for Snubbers

ML20137H557
Person / Time
Site:	Oyster Creek
Issue date:	11/13/1985
From:	GENERAL PUBLIC UTILITIES CORP.
To:
Shared Package
ML20137H518	List: ML20137H513 ML20137H530 ML20137H557
References
NUDOCS 8512020422
Download: ML20137H557 (8)

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4.5-fa P. Suppression Chamber Surveillance

1. At least once per day the suppression chamber water level and temperature and pressure suppression system pressure snall oe checked.

2. A visual inspection of the suppression cnamDer interior, including water line regions, shall be made at each major refueling outage.

3. Whenever heat from relief valve operation is being added to the suppression pool, the pool temperature shall be continually monitored and also observed until the heat addition is terminated.

4. Whenever operation of a relief valve is indicated,and the suppression pool temperature reaches 160*F or above while tne reactor primary coolant system pressure is greater than 180 psig, an external visual examination of the suppression chamber snall be made before resuming normal power operation.

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Amendment No. 18, 32, 87 l

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4.5-6a-1 Q. Shock Suppressors (Snubbers)

1. Each snubber shall be demonstrated operaole by perforiaance of tne fol- i lowing inspection program,

a. Visual Inspections All snubbers shall be visually inspected in accordance with the fol-lowing schedule:

No. Inoperable Snubbers Subsequent Visual Per Inspection Period Inspection Period

• 0 18 montns + 26%

1 12 months T 255 2 6 months T 255 3,4 124 days T 255 5,6,7 62 days T 25%

8 or more 31 days 1254

• The provisions of Tecnnical Specification 1.24 are not applicaole.

The required inspection interval shall not be lengthened more than one step at a time. Tne snuobers may be categorized into two groups: tnose access-ible and those inaccessible during reactor operation. Each group may be inspected independently in accordance witn the above senadule,

b. Visual Inspection Acceptance Criteria Visual inspections snall verify (1) tnat there are no visible indications of damage or impaired OPERABILITY, (2) attachments to *ne foundation or sup-porting structure are secure, and (3) in those locations wnere snuober move-ment can oe manually induced without disconnecting the snubber, that the snuboer nas freedom of movement and is not frozen up. Snubbers nnicn appear inoperable as .3 result of visual inspections may be determined OPERABLE for the purpose of establishing the next visual inspection interval, providing that tne affected snubber is functionally tested in the as found condition and determined operable per Specification 4.5.Q.d or 4.5.Q.e as applicable and that tne cause for the rejection has been clearly established and remedied for that particular snubber.

c. Functional Tests At least once eacn refueling cycle, a representative saiaple (10% of the total of each type of snubber in use in tne plant) shall be functionally tested either in place or in a or un test. For each snuober tnat does not meet the functional test acceptance criteria of Specification 4.5.Q.d or 4.5.Q.e, an additional 107, of tnat type of snuocer shall De functionally tested. As used in tnis specification, type of snubber shall mean snubbers of the same design and manufacturer, mecnanical or hydraulic.

Amendment No.18

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4.5-6a-2 The representative sample selected for functional testing shall include tne various configurations, operating environments and tne range of size and capacity of snubbers. At least 25f, of the snubbers in the representative sdmple shall include snuDbers from the following tnree categories:

1. The first snubber away from eacn reactor vessel nozzle.

2. Snubbers witnin 5 feet of heavy equipment (valve, pump, motor, etc.).

3. SnuDoers within 10 feet of the discharge from a safety relief valve.

In addition to the regular sample, snubDers which failed the previous funC-tional test shall be retested during the next test period. If a spare snuo-ber has been installed in place of a failed snuocer, tnen botn tne failed (if it is repaired and installed in another position) and the replacement snubber snall be retested. Tne results from testing of tnese snucoers are not to be included for determining additional sampling requirements.

For any snuboer that fails to locxup or fails to move, i.e., frozen in place, the cause will be evaluated. If caused by manufacturer or design deficiency, actions shall De taken to ensure tnat all snuboers of the same design are not subject to the same defect.

d. Hydraulic Snubbers functional Test Acceptance Criteria The hydraulic snubber functional test snall verify tnat-

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

2. Snubber bleed, or release rate, wnere required, is within the speci-fied range in compression or tension. For snubbers specifically required to not displace under continuous load, the aoility of the snuDber to withstand loaa witnout displacement shall be verified,

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

1.

The force that initiates free movement of the snubber rod in either tension or compression is less than tne specified maximum drag force.

Amendment No.

4.5-6a-3

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 snuobers specifically required not to displace under continuous load, the ability of the snuDDer to withstand load without displacement shall be verified,

f. SnubDer Service Life Monitoring A record of the service life of each snuboer, the date at whicn the desig-nated service life commences and tne 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 at least once per 18 months thereafter, the installation and maintenance records for each snubber shall De reviewed to verify that toe indicated service life nas not been exceeded or will not be exceeded prior to the next scheduled snubber service life review. If the indicated service life will be exceeded prior to tne next scheduled snuboer service life review, the snubber service life shall be reevaluated or the snubber shall be replaced or reconditioned so as to extend its service life beyond the date of the next scheduled service life review. This reevaluation, replacement or reconditioning shall be in-dicated in the records. Service life shall not at any time affect reactor operations.

Amendment No.

4.5-9b of the system. Althougn this is basically a leak test, since the filters have charcoal of known efficiency and holding capacity for elemental iodine and/or methyl iodide, the test also gives an indication of the relative ef-ficiency of tne installed system. The test procedure is an adaptation of test procedures developed at the Savannan River Laboratory whicn were des-cribed in tne Ninth AEC Air Cleaning Conference

• High efficiency particulate filters are installed before and after the char-coal filters to minimize potential release of particulates to tne environ-ment and to prevent clogging of the iodine filters. An efficiency of 995 is adequate to retain particulates tnat may be released to the reactor building following an accident. This will be demonstrated by testing witn 00P as testing medium.

If laboratory tests for the adsorber material in one circuit of the Standby Gas Treatment System are unacceptable, all adsorber material in that circuit shall be replaced with adsorbent qualified according to Regulatory Guide 1.52. Any HEPA filters found defective shall be replaced with tnose quali-fled with Regulatory Position C.3.d of Regulatory Guide 1.62.

The snubber inspection frequency is based upon maintaining a constant level of snubber protection. Thus, the required inspection interval varies in-versely with the observed snubber failures. Tne number of inoperable snub-bers found during a required inspection deteruines tne time interval for tne next required inspection. Visual Inspections perfonned before an inspection interval has elapsed may be used as a new reference point to determine tne l

next inspection. However, tue results of such early inspections perfonned before the original required time interval has elapsed (nominal time less 257,) may not be used to lengthen the required inspection interval. Any inspection whose results require a shorter inspection interval will override the previous schedule.

To furtner increase the assurance of snuober reliability, functional tests snould be performed at least once each refueling outage. Tnese tests will include stroking of the snubbers to verify proper piston movement, lock-up and oleed. Ten percent of tne snubbers represents an adequate sample for such tests. Observed failures of these samples require testing of additional units.

• 0. R. MunDaier, "In Place Hondestructive Leak Test for Iodine AdsorDers", Proceedings of tne Ninth AEC Air Cleaning Conference, USAEC Report CONF-660904,1966.

Amendment No. 18

6.10.2

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• The following records snall b2 retained for th2 duration of tne Facility Operating License:

a. Record and drawing changes reflecting facility design modifica- l tions made to systems and equipment described in tne Final Safety Analysis Report,

b. Records of new and irradiated fuel inventory, fuel transfers and assembly burnup histories.

c. Records of facility radiation and contamination surveys,

d. Records of radiation exposure for all individuals entering radi-ation control areas,

e. Records of gaseous and liquid radioactive material released to the environs,

f. Records of transient or operational cycles for tnose facility components designed for a limited number of transients or cycles.

g. Records of training and qualification for current members of the plant staff.

h. Records of inservice inspections performed pursuant to tnese technical specificatons,

i. Records of reviews performed for changes made to procedures or equipment or reviews of tests and experiments pursuant to 10 tr'R 50.59.

j. Records of reviews by the Independent Onsite Safety Review Group.

k. Records for Environmental Qualification wnicn are covered under the provisions of paragraph 6.14.

l. Records of tne service lives of all snuboers, including the date at which the service life connences, and associated installation and maintenance records.

6.10.3 Quality Assurance Records snall be retained as specified by the Quality Assurance Plan.

6.11 RADIATION PROTECTION PROGRAti Procedures for personnel radiation protection snall be prepared consistent witn tne requirements of 10 CFR 20 and shall De ap-proved, maintained and adhered to for all operations involving personnel radiation exposure.

6.12 (Deleted) 6-23 Amendment No. 69, 78