ML20072S358
| ML20072S358 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 04/09/1991 |
| From: | CAROLINA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20072S356 | List: |
| References | |
| NUDOCS 9104150148 | |
| Download: ML20072S358 (8) | |
Text
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l ENCLOSURE 1 FRUNEWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 NRC DOCKETS 50 325 6 50 324 OPERATING LICENSES DPR 71 6 DPR 62 SUPPLEMENT TO REQUEST FOR LICENSE AMENDMENT GENERIC LETTER 90 09 SNUBBER VISUAL INSPECTION INTERVALS TECHNICAL SPEqlFICATION PAGES UNIT 1 1
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f.,hR4I00148 910409 F
ADOCK 05 coo 324 PDR
PLANT SYSTEMS 3/4.7.5 SNUBBERS LlHlTING CONDITION FOR OPERATION 3.7.5 All hydraulic and mechanical snubbers shall be OPERABLE.
APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3.
OPERATIONAL CONDITIONS 4 and 5 f or snubbers located on systems required OPERABLE in those OPERATIONAL CONDITIONS.
ACTIONI With one or note snubbers inoperable on any system, within 7; hours replace or restore the inoperable nnubber(s) to OPERABLE status and perf orm an engineering evaluation per Specification 4.7.5.g on the attached component or declare the attached system inoperable and f ollow the appropriate ACTION statement for that system.
SURVEILLANCE RF'QUIREMENTS 4.7.$
Each snubber shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program and the requirements of Specification 4.0.5.
a.
Inspection Types As used in this specification, " type of snubber" shall mean srubbers 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 4.7-1.
The visual inspection interval for each type of snubber shall be determined base upon the criteria provided in Table 4.7-1 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 Inspect ion 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 l
BRUNSWICK - UNIT 1 3/47-9 Amendment No.
PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) inspection interval, provided that (1) the cause of the rejection is clearly established and remedied f or that particular snubber and f or other snubbers irrespective of type that may be generically susceptiblel and (2) the af fected snubber is functionally tested in the as-found condition and determined OPERABLE per Specification 4.7.5.f.
All snubbers f ound connected to an inoperable common hydraulic fluid reservoir shall be counted as unacceptable f or determining the next inspection interval. A review and evaluation shall be performed and documented to justify continued operation with an unacceptable snubber.
If continued operation cannot be justified, the snubber shall be declared inoperable and the ACTION requirements shall be met.
d.
Transient Event inspection An inspection shall be performed of all hydraulic and mechanical snubbers attached to sections of systems that have esperienced unexpected, potentially damaging transients as determined f rom a review of operational data and a visual inspection of the systems within 6 months f ollowing such an event.
In addition to satislying the visual inspection criteria, f reedom-of-motion of mechanical snubbers shall be verified using at least one of the followings (1) manually induced snubber movement ; or (2) evaluation of in place snubber piston settingi or (3) stroking the mechanical snubber through its f ull range of travel.
BRUNSWICK - UNIT 1 3/4 7-10 Amendment No.
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TABLE 4.7-1 SNUBBER VISUAL INSPECTION INTERVAL NUMBER OF UNACCEPTABLE SNUBBERS Population Column A Column B Column C or Category Extend Interval Repeat Interval Reduce Interval (Notes 1 and 2)
(Notes 3 and 6)
(Notes 4 and 6)
(Not es 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 populaflon or category bite 6 hall be determined based upon the previous inspection interval and the number of unacceptable snubber 6 found during that interval. Snubbert may be categorited, based upon their accessibility during power operatica, as accessible or inacce5&lble, these categories may be examined separately or jointly. N wever, the licensee must make and document that decision before any irspection and shall use that decision as the basis upon which to determine the 66mt inspection it,terval for that category.
Note 2: Interpolation between population or category si es and the number of unacceptable snuobers t
is peral56ible. Use nest lower integer for the value of the ilmit f or Columns A, 0, or C if that integer incteded a fractional value of unacceptable snubbers as determined by nterpoletisn.
I Note 3: if the nueDer of unacceptable Snubber $ is equal to or test t han the numbe:
.n Column A, the neat inspection interval may be f ulCe the previous interval but not greater than 48 month 6.
fMte 4 If the number of unacceptable snubbers IS equal to or le&s than the number in Column Q but greater than the numDer in Column A, the next inspection interval 6 hall be the Same as the previoub interval, tete 5: if the number of unacceptable snubbers is equal to or greater than the number in Column C, l
the neat inspection interval shall be two-thirds of the previous interval.
R> wever, if the
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number of unacceptable snubbers is lett than the number in Column C but greater than the number in Column 8, the next interval Shall be reduced proportionally by interpolation, that it, 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 the difference in the numbers in Columns B and C.
tete 6: The provi6 ions of Specification 4.0.2 are applicable for all inspection intervals up to and including 48 montns.
BRUNSWICK UNIT 1 3/4 7-13a Amendment No.
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l ENCLOSURE 2 l
BRUNSWICK STEAM elf.CTRIC PLANT, UNITS 1 AND 2 NRC DOCKETS 50 325 6 50 324 OPERATING LICENSES DPR.716 DPR 62 SUPPLFMENT TO REQUEST FOR LICENSE AMENDME!!T GENERIC LETTER 90 09 SNUBBER VISUAL INSPECTION INTERVALS t
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' ECHNICAL SPEQ!PICATION PAGES + UNIT 2 i
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i PLANT SYSTEMS 3/4.7.5 SNUllBERS LlHITINC CONDITION FOR OPERATION 3.7.5 All hydraulic and mechanical snubbers shall be OPERABLE.
APPLICABILITY OPERATIONAL CONDITIONS 1, 2, and 3.
OPERATIONAL CONDITIONS 4 and $ for snubbers located on systems required OPERABLE in those OPERATIONAL CONDITIONS.
ACTIONI With one or note snubbers inoperable on any system, within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> replace or restore the inoperable snubber (s) to OPERABLE status and perform an engineering evaluation per Specification 4.7.5.g on the attached component or declare the attached system inoperable and follow the appropriate ACTION statement for that system.
SURVEILLANCEREQIR_EHENTS 4.7.$
Each snubber 6 hall be demonstrated OPERABLE by perf ormance of the following augmented inservice inspection program and the requirenwnts of Specification 4.0.5.
a.
Inspect. ion Types As used in this specification, " type of snubber" shall mean anubbers of the same design and manuf acturer, 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 ina.ected independently according to the schedule determined by Table 4.7-1.
The visual inspection interval f or each type of snubber shall be determined base upon the criteria provided in Table 4.7-1 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 Inspect ion Accept ance Cri teria Visual inspections shall verif y 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 l
t BRUNSWICK - UNIT 2 3/4 7-9 Amendment No.
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PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) inspection interval, prnvided that (1) the cause of the rejection is clearly esttblished and remedied for that particular enubber and for other snubbers irrespective, of type that may be generically susceptiblel and (2) the affected snubber is functionally tested in the as-found condition and determined OPERABLE per Specification 4.7.5.f.
All snubbers found connected to an inoperable common hydraulic fluid reservoir shall be counted as unacceptable for determining the next inspection interval. A review and evaluation shall be performed and documented to justify continued operation with an unacceptable snubber.
If continued operation cannot be justified, the snubber shall be declared inoperable and the ACTION requirements shall be met.
d.
Transient Event inspection An inspection shall be performed of all hydraulic and mechanical snubbers attached to sections of systems that have experienced unexpected, potentially damaging transients as determined f rom a review of operational data and a visuct inspection of the systems within 6 months following such an event. In addition to satisfying the visual inspection criteria, f reedom-of-motion of mechanical snubbers shall be verified using at least one of the followingt (1) manually induced snubber movenenti or (2) evaluation of in place snubber piston settings or (3) stroking the mechanical snubber through its full range of travel.
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l BRUNSWICK - UNIT 2 3/4 7-10 Amendment No.
1 TABLE 4.7-1 SNUBBER VISUAL INSPECTION INTERVAL NUMBER OF UNACCEPTABLE SNUBBERS Population Column A Column B Column C or Category 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 S
18 36 500 12 24 48 750 20 40 78 1000 or greater 29 56 109 Note 1: The rent visual inspection interval for a snubber population or category site shall be determined based upon the previous inspection interval and the number of snecceptable snubbers found during that Intervsl. Snubber
- may tv categorised, based upon their accessibility during poser operation, as accessible or inaccessible. These categories may be esamined separately or jointly. Hosever, tne llcensee must make and document that decision before any 6nspect:Nn and shall ube that decision as the basis upon which to determine the next inspection interva! for triat categerv.
Note 2: Interpolation between population or category sites and the number o; unscceptable snubbers is permissible. Use next lower integer for the value of the limit for Columns A, B, or C if that intuger included a f ractional value of unacceptable snubberg as determined oy interpolation, lute 3 li the number of unacceptable snubbers is eoval to or less than the number in Column A, the nemt ;nspection interval may be twice the previous lhterval but not greater than 48 Inonths.
Note 4: If the number of unacceptable snubbers is equal to or less than the numDer in Column D but greater than the numcer in Column A, the nemt inspection interval shall be the same as the previous intervat.
14ot e 5 : It the numoer of unacceptable snubbers is equal to o* greater than the number in Column C, the next lospection interval shall be two thirds of ibe predious interval. However, it the number of unacceptable snubbers is less than the number in Column C but greater than the numbar in (4lumn D, the next interval shall be reduced proportionally by interpolation, that is, the pr evious interval shall be reduced by a f actor that is one-thlfd of the ratio of the difforence between tne number of unacceptable snubbers found dur!ng the previous interval and the number 10 Column B to the ditterence in the numoers in Columns B and C.
Note 6 the provisions of Specification 4.0.2 are applicable for all inspec t ion intervein ";, to cod including 48 months.
BRUNSWICK UNIT 2 3/4 7-13a Amendment No.
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