ML20066C934
| ML20066C934 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 01/07/1991 |
| From: | CAROLINA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20066C933 | List: |
| References | |
| NUDOCS 9101110323 | |
| Download: ML20066C934 (9) | |
Text
- _ _ _ _ _ _ _ - - _ _ - _ _
E
, PLANT SYSTEMS 3/4. 7. 5 SNUBBERS LIMITING 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 for snubbers located on systems required OPERABLE in those OPERATIONAL CONDITIONS.
ACTION:
With one or more snubbers inoperable on any system, within /2 hours 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.
SURVEILLANCE REQUIREMENTS
- 4. 7. 5 Each snubber shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program and the requirements of Specification 4.0.5.
S)
As in this specification, type of snubber shall mean s ers of the same sign and manuf acturer, irrespective of capac M$
h.
Visual Inspection
-4)7y Snubbers are categorized naccessib or accessible during reactor y
operation. Each of these gro
(
ccessible and accessible) may be SI 4 inspected independently accord the schedule below. The first.
h4 inservice visual inspecti f each ty f snubber shall be performed af tes 4 months but wi 10 months of co ing POWER OPERATION and 5,.+g shall include al draulic and mechanical. snub If all snubbers GL }
of eadh type any system are found OPERABLE durin e first U
inservi I
sual inspection, the second inservice visua spection of tha stem shall-be performad at the first refueling outage.
erwise, subsequent visual inspections of a given system shall
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BRUNSWICK - UNIT 1 3/47-9 Amendment No. 74 9101110323 910107 l
PDR ADOCK 050003'24 P
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PLANT SYSTEMS l
l SURVEILLANCE REOUIREMENTS (Continued)
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wo. or Iuum.bn saubem. of--e. a T m 3 L.y m n...
on Any System per Inspection Period Inspection Period *#
0 18 months
- 25%
1 12 months t 2,5(
\\)
2 6 months y 25%
3, 4 124 da r ! 25%
l q
6, 7 62 ys t 25%
l r more 3 days t 25%
d
? El Visual Inspection Acce tance Criteria t.
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.N Visual inspections shall verify thatt ft there are no visible td n indications of damage or impaifed OPERABILITY, (2) attachments to the g
foundation or support structure a' secure, and (3) f asteners for y'
attachment of the snubber to t)e'com ent and to the snubber anchorage are secure.
Snubbers which 4 pear inop ble as a result of visual d
inspections may be deteraif$d OPERABLE for he purpose of establishing 4
the next visual inspe [on interval, provided hatt (1)-the cause of the rejection is c rly established and remedi for that particular snubber and for er snubbers irrespective of type _ n that system that may be generi ly susceptible; and (2) the affected a bber is functional tested in the as-found condition and deter d OPERABLE per Spe ications 4. 7.5.f.
All anubbers connected to an i erable comm hydraulic fluid reservoir shall be counted as inoperabl-s3 era. For those snubbers common to more than one system, the f:.PERABILITY of such snubbers shall be considered in assessing the
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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 l
of operational data and a visual. 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 followingi (1) manually induced snubber revement; or (2) evaluation of_in place snubber piston setting; or (3) stroking the mechanical snubber through its full range of travel.
The inspection interval for each type of snubber on a given system shall not be lengthened more than one step at a time unless a generic problem has been identified and corrected; in ~ that event the inspection interval may be lengthened one step the first time and two steps thereaf ter if no inoperable snubbers of that type are found on that system.
1
- The provisions of Specification 4.0.2 are not applicable.
BRUNSWICK - UNIT 1 3/4 7-10 Amendment No. 74 -
l
i INSERT 11 I
a.
Insceetion Tvoes i
As used in this specification, " type of snubber" shall mean snubbers of the same design and manufacturer, irrespective of capacity, b.
Visual Insceetions Snubbers are categorized as inaccessible or accessible during reactor-operation. Each of these categories (inaccessible and accessible) may be to the schedule determined by.
inspected independently according _
Table 4.7 1.
The visual inspection intervalo f 3r each type of snubber-shall be determined base upon the _ criteria provid ed in Table 4 71 and the first inspection interval determined using this criteria shall be based j
upon the previous inspection interval as establiihed by_the requirements in effect before Amendment i
c.
Visual Insoection Acceptance Criteria Visual inspections shall ve.ify that (1) the snubber has no visible-indications of damage -or impaired OPERABILITY, :(2) attachments to the-1 foundation or 4.upporting 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 i
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_ the cause of the rejection is clearly established and remedied for that particular snubber-and for~ ether snubbers irrespective of type that may be generically susceptible; and (2) _
1 the affected snubber is functionally tested in the as-found condition and:
determined OPERABLE per Specification-4.7.5 f =
All snubbers _7 found connected to an - inoperable-common - hydraulic? fluid reservoir shall be-counted as' unacceptable for-G termining 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 hall be-met.
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4 TABLE 4.7 1 SNUBBER VISUAL INSPECTION INTERVAL NUMBER OF UNACCEPTABLE SNUBBERS Population Colum A
. Colum B Colum C or Category Extend Intervst 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 i
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 it The next visual inspection interval for a snuhber population or category site shall be determined based upon the previous inspection interval and the number of unacceptable snubbers found during that interval. Snubbers may be categortred, based upon their accessibility during power operation,-
as acessible or inaccessible. These categories may be examined separately or jointly. However, the liceesee must make and document that decision before any inspection and shall use that decision as the bas 3 upon which to determina the next inspection interval for that category.
t
.a 2: intsrpolation between population or category sites and the number of unacceptable snubbers la permissible. Use next lower Integer for the value of the limit far Colunns A, B, or C if that integer included a fractional value of unacceptable snubbers as determined by interpolation.
Note 3 If the number of unacceptable snubbers is eqJet to or less than the number in Colum A, the next l
Inspection interval may be twice the previous interval but not greater than 48 months.
Note 4: If the nuter of macceptable snubbers is equal to or less than the nuser in Colum B but greater than the nunber in Column A, the next inspection interval shall be the same as the previous interval.
Note $1 If the number of unacceptable snubbers is equal to or greater than the nuser in Colunn C, the next inspection interval shall be two thirds of the previova interval. However,' if the nuser of unacceptable snubbers is less than the nuter in Colum C but greater than the number in Colum B, l
the next litterval shall be reduced proportionally by interpolation, that 'Is, the previous interval l
shall be reduced by a factor that is one* third of the ratio of the differerwe between the number of j
u, acceptable snubbers found during the previous interval and the nuser in Colum B to the l.
dif ference in the nuters in Colums B and C.
l Note 6: The provisions of Specification 4.0.2 are applicable for all inspection intervals up to and including 48 months.
BRUNSWICK UNIT 1 3/4 7 10a Amendment No.
9 ENCLOSURE 4-BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 i
NRC DOCKETS 50 325 6 50 324 OPERATING LICENSES DPR 71 & DPR-62 REQUEST FOR LICENSE AMENDMENT CENERIC LETTER 90 09 SNUBBER VISUAL INSPECTION INTERVALS TECHNICAL SPECIFICATION PAGES UNIT 2 l
l
PLANT SYSTEMS 3/4. 7.5 SNUBBERS LIMITINO CONDITION FOR OPERATION
APPLICABILITY:
OPERATIONAL CONDITIONS 1, 2, and 3.
OPERATIONAL CONDITIONS 4 and 5 for snubbers located on systems required OPERABLE in those OPERATIONAL CONDITIONS.
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):co 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.
SURVEILLANCE REQUIREMENTS
- 4. 7. 5 Each snubber shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program and the requirements of Specification 4.0.5.
.s
....y....-..
.,r..
As in this specification, type of snubber shall mean 's ers of g
the same sign and manuf acturer, irrespective of capac 3.
Visual Inspection
_f Snubbers are categorized naccessi or accessible duriag reactor operation. Each of these gro (kn ccessible and accessible) may be s
d inspected independently accor g
the schedule below.- The first g
inservice visual inspect of each ty f snubber shall be perf ormed after 4 months but w n 10 months of co ing_ POWER OPERATION and
'q-g shall include a ydraulic and_ mechanical. snub If all snubbers of each typ any system are found OPERABLE durin e first
-3 inservi isual inspection, the second inservice visua spection of gs tha ystem shall be performed at the first-ref.. ling outage.
erwisa, subsequent visual inspections of a given system shall r..f..
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BRUNSWICK - UNIT 2 3/479 Amendment No. 100 l
l
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=,..
n m
l PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)
_m N ~$n 1ny 3 te7pe I ins Yetionleli$
Insketio[P[rtI*#[
~
0 18 months i 2 1
12 months t. t O'
2 6 month 25%
3, 4 124 d a t 25%
, 6, 7 6
ays 25%
8 e more days
- 25%
Visual Inspection Acce ance Criteria tj N
l O* f*
Visual inspections shall vert (y that: A ) there are no visible indications of damage or-impattest OPRifABILITY, (2) attachments to the di foundation or support structure
' secure, and (3) fasteners for r-4 attachment of the snubber to com ent and to the enubber anchorag(
h are secure. Snubbers whic ppear inop able as a result of visual
}
inspections may be deter ned OPERABLE for he purpose'of establishing the next visual inspe on interval, provide hatt (1) the cause of d
the rejection is c rly established and remedie for that particular snubber and for her snubbers irrespective-of type n that system that may be gener 11y susceptible; and -(2) the af fected bber is functional' tested in the as-found condition and deter d OPERABLE per Spe ications 4. 7.5.f.
All snubbers connected to an i etable comm hydraulic fluid reservoir shall be counted as inoperabli.
s be rs. For those snubbers common to note than -one system, the PERABILITY of such snubbers shall be considered in assessing the s
.a aill-us,
- w.,
^ wut rata 6au sy n c e==.
uno m.
sowu v d.
Transient Event Inspection An inspection shall be performed of all hydraulic and mechanical l
snubbers attached to sections of systems that have experienced unexpected, potentially damaging transients as determined from a review of operational data and a visual inspectien of the systems within 6 months following such an event. In addition to satisfying the visual inspection criteria, freedom-of-motion of mechanical snubbers shall be verified ueing at least one of the following:
(1) manually induced snubber movement; or (2) evaluation of in place snubber piston setting, l
or (3) stroking the mechanical snubber through-its Lfull range of travel.
The inspection interval for each type of snubber-on a given system shall not be lengthened more than one step at a-time unless a' generic problem has been identified and corrected; in that event the inspection interval
-say be lengthened one step the first time and two steps thereaf ter if no inoperable snubbers of that type are found on that system.
- The provisions of Specification 4.0.2 are not applicable.
BRUNSWICK - UNIT 2 3/4 7-10 Amendment No. 100 l
l 9
-a-y
,-yr-
4 MSERT 1 a.
Insoection Tvoes As used in this specification, " type of snubber" shall mean snubbers of the same design and manufacturer, irrespective of capacity.
b.
Visuni 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 4.71 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 Inspection 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 the cause of the rejection is clearly established and remedied for - that particular snubber and for other snubbers irrespective of type that may be generically susceptible; 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 perfcrmed 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.
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_ _ _ _ _ _ _ _ - - _. _ _ _ _ ~
TABLE 4.7 1
- SNUBBER VISUAL: INSPECTION INTERVAL ~
i NUMBER OF UNACCEPTABLE SNUBBERS l
Population Col m A -
Coluun B Colum C.
i or Category Extend Intervat-Repeat Interval Re&ce Interval-(Notes 1 and 2)
(Notes 3 and 6)
(Notes 4 and 6)
(Notes 5 ard 6) 1 0
0 1
80 0
0 2.
j 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 11 Th3 next visual inspection interval for a snubber population or category-size shall'be determined.
based won the previous inspection interval and the rumber of-unacceptable snub 3ers found & ring that intervat. Snubbers say be categorized, based @on their accessibility dur Me power operation, as accessible or inaccessible. These categories may be examined separately or Joletly. However, l
the licensee must make and document that decision before any Inspection-and shall me that decision-as the bests upon which to determine the next inspection interval for that category.
Note 2i Interpolation between population or category sizes and the rumber 'of unacceptable snubbers la permissible. Use next. lower Integer for the value of the limit for Coluuns A, 8,' or C if that integer included a fractional value of unacceptable snubbers as determined by interpolation.-
Note 3 If the rwnber of unacceptable snubbers is equal to or less then-the nu2er in Colum A, the next -
inspection interval may be twice the previous Interval but not greater than 48 months, l
Note 4 If the rwnber of unacceptable snubbers is equal to or lEsa then-the number in Colum B but greater than the rumber in Colum A, the next inspection interval shall be,the same as the previous j
intervat.
i Note $3 If the nuNber of unacceptable snubbers is equal to or greater than (he' number in Colum C,' the next inspection Interval sheLL be two thirds of the previous interval. However,-if the r%mber of
. unacceptable snumbers is less than the number in Colum C but greater.than the number in Column B, the next Intervet shalt be reduced proportionally by' interpolation, that Is, the previous intervat-
.-shall be reduced by 4 factor that is one third of the retto of. the dif ference between the nueer of i
i.
unacceptable snubbers found during the previous Interval and the number in Colum B to the dif ference in the rueers in Colums 8 and C.-
Note 61 the provisions of Specification 4.0.2 are applicable for att -Inspection-intervals up to and i
including 48 months.
BRUNSWICK
-UNIT 2
=3/4-7-10a
. Amendment No.
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