ML20070F541

Proposed Tech Spec Table 4.7-2 Re Snubber Visual Insp Interval

ML20070F541
Person / Time
Site:	Wolf Creek
Issue date:	03/05/1991
From:	WOLF CREEK NUCLEAR OPERATING CORP.
To:
Shared Package
ML20070F540	List: ML20070F537 ML20070F541
References
ET-91-0044, ET-91-44, NUDOCS 9103080346
Download: ML20070F541 (8)

Text

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, Attaclunent IV to ET 91-0044 Page 1 of 8 ATTACIMENT IV FROPOSED TECllNICAL SPECIFICATION CIIANGES 9103080346 910305 PDR ADOCK 05000482 P PDR

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t Attachinent41V. to ET 91-0044 l l

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iLIMITING CONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS.

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.'SECTION f TABLE 3.7-1 MAXIMUM ALLOWABLE--POWER RANGE-N'EUTRON FLUX-HIGH SETPOINT WITH INOPERABLE:

STEAM LINE-SAFETY VALVES DURING FOUR-LOOP

.0PERATION........-............-..................... 3/4 7-2 4 i

-TABLE _3.7-2 : STEAM LINE-SAFETY VALVES PER-LOOP... ................. 3/4 7-3 Auxiliary Feedwater System............................... -3/4:7-4 .

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-Condensate-Storage Tank.................................. 3/4 7-6 Specific Activity.......,'...............................,. 3/4 7-7

" TABLE'4.7-1:. SECONDARY COOLANT SYSTEM SPECIFIC ACTIVITY

-5 AMPLE'ANDfANALYSIS PR0 GRAM......................... 3/4 7 . Mai n = Steam Li ne ' Isol ation ' Val ves. . ... . . . . . . . . . . . . . . . . . . . . . 3/4 7-9 3/4.- 7. 2 ' STEAM GENERATOR PRESSURE / TEMPERATURE LIMITATION.......... 3/4:.7-10 -

- 3/4. 7.' 3'~ COMPONENT COOLING WATER SYSTEM........................... 3/4 7-11

3/4.7.4 = ESSENTIAL SERVICE ~ WATER SYSTEM........................... 3/4 7-12 f 3/4.- 7. 5-- ULTIMATE HEAT SINK..-...................................... 3/4 7-13 3/4;7.6- ' CONTROL, ROOM EMERGENCY VENTILATION. SYSTEM................ 3/4.7 3/4.7.7 EMERGENCY EXHAUST SYSTEM................................. 3/4 7-17 3/4.7.8- SNUBBERS..... ........................................... 3/4 7-19 FIGURE ,4.7-1, SAMPLINGLPLAN 2) FOR SNUBBER FUNCTIONAL- TEST. . . . . . . . . 3/4 7-24 3 3/4.-7. 9 -- SEALED SOURCE CONTAMINATION.............................. 3/4.7-25

- TABLE :4.7-2 L SNUBBER VISUAL NSPECTION INTERVAL 1

WOLF' CREEK - UNIT 1 X

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• Attachment IV 'to ET 91-0044

. Page 3 of 8 P[ANTSYSTEMS

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- f1 3/4.7.8 SNUBBERS LIMITING CONDITION FOR OPERATION

'3.7.8 All snubbers shall be-OPERABLE. The only snubbers excluded from the requirement are those installed on nonsafety-related systems and then only if

.their f ailure or f ailure'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 re'qluTred 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 4.7.8g on the attached component or declare the attached system inopera-ble and follow-the appropriate ACTION statement for that system.

SURVEILLANCE REQUIREMENTS u

4.7.8 .Each snubber shall be' demonstrated OPERABLE by performance of the follow-ing augmented -inservice inspection program and the requirements of Specifica-tion 4c0.5,

a. Inspection Types As 'used in t'h is specification, type of snubber shall mean snubbers of the same design and manufacturer, irrespective of capacity, b, Visual Inspections -

snubb= = ategerecc =

(InsertA) ==ib,e 4r ==ib,e -eur ,g eter 4 speratier. Each-Of the:0 group (inacce: ible ind ecces:4b'e) may be 4" p00ted 4 ndependently =wei+g tc th ;chedule belev The rct 4

9:erv1:0 vicu:1i nspec-tien Of :ch type Of snubber :hal' be perfcrmed after ^ menth; but jth'n 10 month; cf cc mencing P0i!EP OPER^710F :nd 0h: 11 i n:4ude all hydrauli and mech:nical nubber . I' :!' cr"bbert cf each type are found OPERABLE dur ng the first 'ncer" ice i:c:1 4

Linspectien, the :econd 4ncervice 'icu ' *ntpectier cf that type 05:l' be perf 0rmed Ot' the first ref-ucling cutage.

Other'ite, cub;0guent

-44s0:1 i nspec-t i on:-- o f - g i v en-typ: thcl' be performed 4^ acc:rdance-

"ith the fcilcu ng schedule:

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WOLF CREEK - UNIT 'l 3/4 7-19

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,Attachm3nt IV to ET 91-0044

, Page 4 of 8 Insert A 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 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 inspectiop interval as established by the requirements in effect before amendment ( ).

NRC to include the number of the license amendment that implements this change

ype n ,

7 AffachmentIVtoET 91-0044 Page 5 of 8 PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) _

iu _< t_#u e.mm- m< rs e ms , _ ,a m,a M [ ebb on [eb od inspect [orL3ert6 0 18 months 25%

1 12 months 1 25%

2 6 mnnths 25%

5,6,7 6 9 cr mere 31 day; _ 25%

Visual Inspection Acceptance Criteria '

c.

Visual inspections shall verify that: (1) there are no visible indi-cations of damage or impaired OPERABILITY, and (2) attachments to the foundation or supporting structure are functional, and (3) fasteners for attachment of the snubber to the component and to the snubber anchorage are functional. Snubbers which appear inoperable as a result of visual inspections fay be dctcr-incd OP[rn:LE 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 irrespec-tive of type that may be generically susceptible; or (2) the affected snubber is functionally tested in the as-found condition and determined OPERABLE per Specification 4.7.8f. ^1' :nubber: cc mccted to on

%0per:bl^ c0=cn hydraulic 'luid-r+servcir chall be counted at i-operablp_ :- S t c~ c . Gnsert83

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i_ hall _ be_ class 1fied as unacceptabls and may be reclassified acceptabh

d. Transient tvent Inspections - - -

An inspection shall be performed of all hydraulic and mechanical snub-bers attached to sections of systems that have experienced unexpected, potentially damaging transients as determined from a review of opera-tional data and a visual inspection of the systems within 6 months following such an event. In addition to satisfying the visual inspection acceptance criteria, freedom-of-motion of mechanical snubbers shall be verified using at least one of the following:

(1) manually induced snubber movement; (2) evaluation of in place snubber piston setting; or (3) stroking the mechanical sne v r through its full range of travel.

^iiie iu>pecLivu inteival ivi cach tge of snubber shall not bc 1:.r-gthened we Lucu vue alep al o Lime v.il655 6 g 6 D 6 T i C prob 4tflt-het-beeft-4defTt4-f4ed-eftd corrected; in that-event-the-4nspeet4en-4nterval may be lengt-hened-ene-+ttp-the f i r 3 t t4mc ;nd two-tteps-thereef+ee4f-no-4eopereble-enebbees--of-4 hat-type w+

found.

sine pivvisivus vi Secuificetica 4.0.2 crc n t opp-liest4e, I

WOLF CREEK - UNIT 1 3/4 7-20

Attachmsnt IV to ET 91-0044 Page 6 of 8 l

1 Insert B All snubbers found connected to an inoperable common hydraulic fluid  ;

reservoir shall be counted as unacceptable for determining the next l inspection interval. A review and evaluation shall be performed and documented to determine system operability with an unacceptable snubber. If  ;

operability cannot be justified, the system shall be declared inoperable and the ACTION requirements shall be met.

4 Attschm:nt IV to ET 91-0044 Page 7 of 8 Insert C (Table 4.7-2 should be inserted in front of Figure 4.7-1)

TABLE 4.7-2 SNUBBER VISUAL INSPECTION INTERVAL NUMBER OF UNACCEPTABLE SNUBBERS Population Column A- Column B Column C per Categort- Extend Interval Repeat Interval Reduce Interval (Notes 1 and 2) (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 20 40 78 1000 or greater 29 56 109 Note 1: The next visual inspection interval for a snubber category shall be determined based upon the previous inspection interval and the rumber 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, categories must De determined and documented before any inspection and that determination shall be the basis upon which to determine the next inspection interval for that category.

Note 2 Interpolation between population per category and the number of unacceptable snubbers is permissible. Use next lower integer for the value of the limit for Columns A, B, and C if that integer includes a fractional value of unacceptable snubbers as determined by interpolation.

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1Attachmsnt IV to ET 91-0044: -

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,s Insert C (con't) i Table 4,7-2 (Continued)

SNUBBER VISUAL INSPECTION INTERVAL 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'not greater than 48 months.

Note.4:- If the number of unacceptable snubbers is equal to or less than the

.numbe'r in Column B but greater than the-number in Column.A. the-next . inspection: interval shall- be the same as the previore 1 interval ~.

Note St LIf the number of unacceptable. snubbers is equal to or greater than  !

the number in Column 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 shall1be

. reduced > proportionally by interpolation, that is, the previous  !

-interval shall. be reduced by a : factor that is one-third of the.

ratio of the difference.between the number of' unacceptable snubbers ,

found : during the previous interval and the number in Column B to 1 the difference.in the numbers in Column B and C.

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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