ML20198H536

Tech Spec Pages for TS 3/4.7.8 for Use in Lieu of ASME Section XI Requirements

ML20198H536
Person / Time
Site:	McGuire, Mcguire
Issue date:	12/17/1997
From:	DUKE POWER CO.
To:
Shared Package
ML20198H541	List: ML20198H536 ML20198H544 ML20248J679
References
NUDOCS 9801130333
Download: ML20198H536 (4)

Text

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,y 1 PLANT SYSTEMS

'4.7.C SNUB 8ERS i

LIMITING:CONDITIONLFOR OPERATION 3.7,8 ! All-snubbers shall-be OPERABLE. 'The only snubbers excluded. from the -

requirements.are these installed on non-safety-related systems and-then only

. if-the-failure or the failure of the system on which they are installed would

'not have-an adverse effact on-any safely-related system.

' APPLICABILITY:

N0 DES 1, 2 3 and 4.

MODES 5 and 6 for snubbers located on systems required OPERABLE-In those MODES.

i

~ ACTION:-

With one or moreisnubbers ino? arable, within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> rglace or restore the inoperable-snuboer(s) to OPERABLE status and perform asi engineering evaluation per< Specification 4.7.8g. on th attached component or declare the attached system inoperable and follow the appropr.iate ACTION statement for that system.

SURVEILLANCE REQUIREI NTS z:

4.7.8 Each snubber shall-be demonstrated OPERABLE by >erfermanc'e of t%

following

. Specific tgaented inservice inspection program and tie requiremaa'-

4.0.5.

a.

Inspection Types, As used in this specification, type of unubber n

..n snubbers

• of the same design and manufacturer, irrespective oicapacity, b.

Visun'i Inspections

- l' Snubbers are categorized as inaccessib.le or accessible during reactor operation and may be treated independently.

Each of these categories

' ing to the schedule detemine)d by Table 4.7-2.(inaccessible and accessibia t The visual inspectiu :

interval for each category of snubber shall be determined based upon the critaria provided in Table 4.7.-2 and the first inspection inter-val determined using this criteria shall be based upon the previous inspection interval-asJestablished b before Amendment Nos.126 and108. y the requirements 'n effect u

9901130333 971217 PDR ADOCK 05000369 P

p;3g

/McGUIRE-HNATS1and2 3/4 7-18' Amendment No.2126 (Unit 1)

~

Amendment No.108 (Unit 2)-

Table 4.7 2 (continued)

SNUBBER VISUAL INSPECTION INTERVAL Note 4:

If the number of unacceptable snubbers is equal to or less than the Cclumn 8-but greater than the number in Column A, the next inspection shall be the same as the previous interval.

- Note 5:

If the number of unacceptable snubbers is equal to or areater than the number in Column 4, the next inspection interva.1 shall be two-thirds of the previcJs interval. However, if the number of unaccep-table snubbers is 'iess than the number in Column C but greater than the number in Colt.mn B, t'te next interval. shall be ' reduced propor-3 tionally by inte polation,. that is, the previous interval shall be reduced by a factor that is one third of the ratio of the (ifference between the number of unacceptable snubbers found during the previous interval and the number in Column B to the differenca in the numbers in Columns E and C.

i Nste 6:

The provisions of Specification 4.0.2 are applicable for all inspection intervals up to and including 48 months.

=

C.

.McGUIREJ-UNTTS 1 and 2

'3/4 7-18b Amendment No.126 Unit 1 Amendment No.108 Unit 2

1 l

'"IRVEILLANCE' REQUIREMENTS (Continued) c.

Refueling Outage Inspections At,each refueling, the svstems which have the potential for a severe dynamic event, specifically, the main steam system (upstream of the main steam isol eion valves) the main steam safety and power-operated relief valves a.id piping, auxiliary feedwater system, main steam supply to the auxiliary feedwater pus) turbine, and the letdown and charging portion of the CVCS system sia11 be inspected to determine if there has been a severe dynamic event.

In case of a severe dynamic event, mechanical snubbers in that system which experienced the

)'

event shall be. ins >ected during the-refueling outage to assure that the mechanical snu>bers have freedom of movement and are not frozen up.

The inspection shall consist of verifying freedom of motion using one of the following:

(1) ennually fnuuced snubber movement (2) evaluation of in place snubben piston setting; (3) stroking the;'

i-

- mechardcal snubber through its full. range of travel.. If one or more mechanical snubbers ara found to be frozen up during this inspection, those snubbers shall' be. replaced or repaired before returning dent of the requirements of this specification.The requirements of' S to power.

independen d.

Visual Inspection Acceptance Criteria Visual inspections tha11 verify:d 0PERA81LITY,.and (2) attachments (1) that there are no visible indications of damage or impaire to the foundation or supporting structure are secure.

Snubbers which appear inoperable as a result of visual inspections "shall oe classified as unacceptable and may be reclassified acceptable" for thel purpose of establishing the r. ext visual inspection interval,d provided that:

(1) the cause of the rejection is clearly establishe and remedied for that aarticular snubber' ally susceptible; and for other snubbers irrespective of type t1at may be generic 9

~

4 McGUIRE

.tJNITS 1 and 2 3/4 7-19 Amendment No.126 (Unit 1)

Amendment No.108 (Unit 2) i-

.m--.

t PtJNT SYSTEMS'

-SURVEf t.tANCE REQUIREMENTS (Continued)'

Functional Tests (Continued) e.

h 3)

An initial representative sample of fifty five (55) snubbers

'shall be functionally tested.

For each snubber which does not meet the functional test acceptance criteria, another sample or i

at least one-half the size of the initial sample shall be tested untti the total numbe;r tested is ' equal to the initial sample size multiplied by the factor,1 + C/2, where "C" is the number of snubbers found which do not meet the functional test acceptance criteria.

This can be plotted using an " Accept" line which follows the equation tl = 55(1 + C/0).

Each snubber should be plotted as f

soon as it is tested.

If the point plottee falls on or below the " Accept" line testing may be discontinued.

If the point plotted fal'Is above the " Accept" Ifne, testing must continue unless all snubbers have been tested.

The representative samples for the functional test sample plans shall be randoacly selected from the snubbers required b cation 3.7.8 and reviewoo before beginning the testing.y Specif1-The review shall ensure as far as i

3 capacities.

gurations,pract cal that they are. representative of the various confi operating environments, range of sites, and Snubbers placed in the same locations as snubbers which 4

failed the previous functional t.est shall be retested at the time of the next functi)nal test but shall not be included in the sample -

plan.

If during the functional testing, additional sampling is '

required due to failura of only one type of snubber, the functional testing.results shall be reviewed at that time to determine if additional samples should be Itaited to the type of snubber which has failed the. functional testing.

f.

Functional Test Acceptance Criteria The snubber functional test shall verify that:

1)

Activation (restraining action) is achieved within the specified range in both tension and. compression, 'except that inertia dependent, acceleration limiting mechanical snubbers i

cay be tested to verify only.that activation takes place in both directions of travel; 2)

Snubter bleed, or release rate where required, is present in l

both tension and compression, within the specified range; 3)

Where required, the force required to initiate or maintain motion of the snubber is within the specified range in both direction of travel; and

'4)

For t.nubbers spect'fically required not to displace under

ontinuous lo' ad, the ability of the snubber to withstand load without displa.coment.

Testing methods may be used t6 measure parameters lodirectly or parameters other than those specified if those results can be,

correlated to the sper.ified parameters through established m _ hods.

McGUIRE - UNITS 1 and 2 3/4 7-21 Amendment No. M (Unit 1)

Amendment No. 01 (Unit 2) r

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