ML20081L020

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Proposed Tech Specs Re Generic Ltr 90-09, Alternative Requirements for Snubber Visual Insp Intervals & Corrective Actions
ML20081L020
Person / Time
Site: Millstone Dominion icon.png
Issue date: 06/25/1991
From:
NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20081L016 List:
References
GL-90-09, GL-90-9, NUDOCS 9107020311
Download: ML20081L020 (6)
v • d • e


Text

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Double No. 50-423 B13866 Attachment 1 Millstone Nuclear Power Station, Unit No. 3 Proposed lechnical Specification Change Snubber Visual Inspection Interval i,

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l June 1991 9107020411 910625 PDR ALOCK 05000423 P PDR

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INDEX

'1IMITING CONDITIONS FOR OPERATION AND SURVEILLANCE RE0VIREMENTS SECTION EAGE TABLE 3.7-3 STEAM LINE SAFETY VALVES PER L00P..................... 3/4 7-3 Auxil i ary Feedwater System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3/4 7-4 Demineralized Water Storage Tank......................... 3/4 7-6 Sp ec i f i c Ac t i v i ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3/4 7-7 TABLE 4.7-1 SECONDARY COOLANT SYSTEM SPECIFIC ACTIVITY SAMPLE j l

AND ANALYSIS PR0 GRAM.....................................

3/4 7-8 Main Steam Line Isol ation Valves. . . . . . . . . . . . . . . . . . . . . . . . . 3/4 7-9 3/4.7.2 STEAM GENERATOR PRESSURE / TEMPERATURE LIMITATION.......... 3/4 7-10 3/4.7.3 REACTOR PLANT COMPONENT COOLING WATER SYSTEM............. 3/4 7-11 3/4.7.4 SERVICE WATER SYSTEM..................................... 3/4 7-12 3/4.7.5 ULTIMATE HEAT SINK....................................... 3/4 7-13 3/4.7.6 FLOOD PR0TECTION......................................... 3/4 7-14 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM................ 3/4 7-15 3/4.7.8 CONTROL ROOM ENVELOPE PRESSURIZATION SYSTEM.............. 3/4 7-18 3/4.7.9 AUXILIARY BUILDING FILTER SYSTEM......................... 3/4 7-20 3/4.7.10 SNUBBERS................................................. 3/4 7-22 TABLE 4.7-2 SNUBDER VISUAL INSPECTION INTERVAL ................... 3/4 7-26a FIGURE 4.7-1 SAMPLE PLAN 2) FOR SNUBBER FUNCTIONAL TEST........... 3/4 7-27 .

3/4.7.11 SEALED SOURCE CONTAMINATION.............................. 3/4 7-28 3/4.7.12 FIRE SUPPRESSION SYSTEMS Fire Suppression Water System............................ 3/4 7-30 Spray and/or Sprir.kl er Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . 3/4 7-33 CO Systems.............................................. 3/4 7-35 2

H a l o n Sy s t e m s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3/4 7-37 Fire Hose Stations....................................... 3/4 7-38

. TABLE 3.7-4 FIRE HOSE STATIONS.................................... 3/4 7-39 Yard Fire Hydrants and Hydrant Hose Houses............... 3/4 7-40 TABLE 3.7-5 YARD FIRE HYDRANTS AND ASSOCIATED HYDRANT HOSE HOUSES. 3/4 7-41 3/4.7.13 FIRE RATED ASSEMBLIES............................ ....... 3/4 7-42 3/4.7,14 AREA TEMPERATURE M0NITORING.............................. 3/4 7-44 TABLE 3.7-6 AREA TEMPERATURE MONITORIN0.......................... 3/4 7-45 MILLSTONE - UNIT 3 x 0048

PLANT SYSTEMS

~3/4.7.10 SNVBBERS LIMITING CONDITION FOR OPERATION 3

3.7.10 All snubbers snall be OPERABLE. The only snubbers excluded from the

] requirements are those installed on nonsafety-related systems and then only if their failure or failure of the system on which they are installed would have no adverse effect on any safety-related system.

APPLICABILITY: MODES 1, 2, 3, and 4. MODES 5 and 6 for snubbers located on systems required OPERABLE in those MODES.

ACTION:

With one or more snubbers inoperable on any system, 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 OPERABLE status and perform an engineering evaluation per Specification 4.7.109. on the attached component or declare the attached system inoperable and follow the appropriate ACTION statement for that system.

SURVEILLANCE RE0VIREMENTS 4.7.10 Each snubber shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program and the requirements of Specification 4.0.5.

a. Insoection Tvoes As used in this specification, " type of snubber" shall mean snubbers of the same design and manufacturer, irrespective of capacity.
b. Visual Inspections Snubbers are categorized as inaccessible or accessible during reactor operation. Each of these categories (inaccessible and accessible) may be inspected independently according to the schedule determined by Table 4.7-2. The visual inspection interval for each type of snubber shall be determined based upon the criteria provided in Table 4.7-2 and the first inspection interval determined using this criteria shall be based upon the previous inspection interval as established by the requirements in effect before Amendment .
c. Visual Insoection Acceptance Criteria Visual inspections shall verify that (1) the snubber has no visible indications of damage or impaired OPERABILITY, (2) attachments to the foundation or supporting structure are functional, and (3) fasteners for the attachment of the snubber to the component and to the snubber anchorage are functional. Snubbers which appear inoperable as a result of visual inspections shall be classified as unacceptable and may be reclassified acceptable for the purpose of establishing the next visual inspection interval, provided that (1) the cause of the rejection is clearly established and remedied for that particular snubber and for other snubbers irrespective of MILLSTONE - UNIT 3 3/4 7-22 Amendment No. E2 0049

PLANT SYSTEMS SURVEILLANCE REOUIREMENTS (Continued) type thatismay be generically snubber susceptibic, and functionally tested in the determined OPERABLE per Specification .. ..

4 7 10 condition andfa s-foun(d2) th connected counted as to an inoperable unacceptable for common hydraulic fluid resAll snubbers f interval. determining the ervoir shall be next to justify continued operation with aninspection continued unacA umented review and ceptable snubber.

declaredoperation cannot and be thejustified, the snubber shall be If d.

inoperable ACTION a requirements e met.

sh ll b Transient Event Inspection 1 An inspection shall be performed of all damaging and a visual transients as determined snubbers attached e from potentially to a reviews such an event.inspection of the systems within 6 months f llof ope, rati In addition to satisfying the visual inspection o owing acceptance criteria, be verified using at least freedom-of-motion of mechanical induced snubber mov or one of the following: snubbers (1 shall 3 of in-plac)e manually piston setting; or (ement; full range snubber of travel, ) strok e.

Functional Tests During the first refueling shutdown and at least thereafter during shutdown, a representative once per 18 months The sample plan for eachsample period and cannot type of r 'bbers of g sa shall

..ie plans.be selectede be changed during the test period. the test prior to plan selected for each snubber r ng of thetype sample prior to the The NRC sample plan used in the prior test period shall or est period mplemented:

bethe i

1) At functionally tested either in-place r shall or be in a bleast 1 each snubber of a type that does enchmeet not test. the For functi acceptance critoria of Specification 4.7.10f onal test of that type of snubber shall be .,functionally an additional 5% tested morefunctionally been failures tested; are foundor or until all s,4bbers until no of th t t a ype have MILLSTONE - UNIT 3 3/4 7-23

TABLE 4.7-2 SNUBBER VISUAL INSPECTION INTERVAL

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NUMBER OF VNACCEPTABLE SNVBBERS Population Column A Column B Column C or Category Extend Interval Repeat Interval Reduce Interval (Notes 1 and 21 (Notes 3 and 6) (Notes 4 and 6) (Notes 5 and 6) 1 0 0 1 80 0 0 2 100 0 1 4 150 0 3 8 200 2 5 13 300 5 12 25 400 8 18 36 500 12 24 48 750 70 40 78 1000 or greater 29 56 109 Note 1: The next visual inspecticn interval for a snubber population or category size shall be determined based upon the previous inspection intetval and the number of unacceptable snubbers found during that interval . Snubbers may be categorized, based upon their accessibility during power operation, as accessible or inaccessible.

These categories may be examined separately or jointly. However, the licensee must make and document that decision before any inspection and shall use that decision as the basis upon which to determine the next inspection interval for that category.

Note 2: liiterpolation between population or category sizes and the number of unacceptable snubbers is permissible. Use next lower integer for the value of the limit for Columns A, B, or C if that integer included a fractional value of unacceptable snubbers as datermined by interpolation.

Note 3: If the number of unacceptable snubbers is equal to or less than the number in Column A, the next inspection interval may be twice the previous interval but no greater than 48 months.

Note 4: If the number of unacceptable snubbers is equal to or less than the number in Column B but greater than the number in Column ,,, the next inspection interval shall be the seme as the previous interval.

Note 5: If the number of unacceptable snubbers is equal to or greator than the number in Celumn C, the next inspection interval shall be two-thirds of the previous interval. However, if the number of unacceptable snubbers is less than the number in Column C but greater than the number in Column B, the next interval shall be reduced proportionally by intemolation, that is, the previous interval shall be reduced by a factor that is one-third of the ratio of the difference between the number uf unacceptable snubbers found during the previous interval and the number in Col umn B to the difference in the numbers in Columns B and C.

MILLSTONE - UNIT 3 3/4 7-26a 0050

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TABLE 4.7-2 <

SNUBBER VISUAL INSPECTION INTERVAL Note 6: The provisions of Specification 4.0.2 are applicable for all inspection intervals up to and including 48 months.

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i MILLSTONE - UNIT 3 3/4 7-26b '

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