ML20009A009

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Proposed Changes to Tech Specs 3.7.10,4.7.10,Tables 3.7-4a & b,3/4.7.9.1 & 2,3/4.7.10,3/4.7.11,Tables 3.3-3,3.3-4 & 4.3-2 & 6.9 for Unit 1 & 3.7.10,4.7.10 & Tables 3.7-4a & B for Unit 2 Re Inservice Surveillance for Snubbers
ML20009A009
Person / Time
Site: North Anna  Dominion icon.png
Issue date: 07/01/1981
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20009A007 List:
References
NUDOCS 8107070359
Download: ML20009A009 (66)
v • d • e


Text

- _ - _ _ _ _ _ _ _ _ _ _ _ _ _ - _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .

O PLANT SYSTEMS 3/4.7.10 SNUBBERS LIMITING CONDITION FOR OPERATION 3.7.10 All snubbers listed in Tables 3.7-4a and 3.7-4b shall be OPERABLE.

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, 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 inonerable snubber (s) to OPERABLE status and parform an engineer ing evaluation per Specification 4.7.10.c on the supported component or declare the supported systera inoperable and follow the appropriate ACTION statement for that syJtem. >

SURVEILLANCE REQUIREMENTS 4.1.10 Each snubber shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program and the requirements of Specification 4.0.5.

a. Visual Inspections The first inservice visual inspection of snubbers shdll be performed after four months but within 10 months of commencirig POWER CPERATION and shall include all snubbers listed in Tables 3.7-4a and 3.7-4b.

If less than'two (2) snubbers are found inoperable during the first inservice visual inspection, the second inservice visual inspectior, shall be performed 12 months i 25% from the date of the first inspection. Otherwise, subsequent visual inspections shall be performed in accordance with the following schedule:

No. Inoperable Snubbers Subsequent Visual per Inspection Period Inspection Period *y 0 18 months 2 25%

1 12 months i 25%

2 6 months i 25%

3,4 124 days 25%

5,6,7 62 days i 25%

8 or more 31 days i 25%

The snubbers may be categorized into two groups: Those accessible ard those inaccessible during reactor operation. Each group may be inspected independently in accordance with the above schedule.

n

, The inspection interval shall not be lenthened more than one step at a time.

i The provisions of Specification 4.0.2 are not applicable.

NORTH ANNA - UNIT 1 3/4 7-20 8107070359 810701 h PDR PDRADOCKO*000338]0

l l

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

b. Visual Inspection Acceptance Criteria i

Visual inspect h ns shall verify (1) that there are no visual indica-tions of damage or impaired OPERABILITY, (2) attachments to the l foundation or supporting structure are secure, and (3) in those locations where snuober movement can be manually induced without disconnecting the snubber, that the snubber has freedom of movement and is not frozen up. Snubbers which appear inoperable as a result of visual inspections may be determined OPERABLE for the purpose of establishing the next visual inspection interval, prcviding that l

i (1) the cause of the rejection is clearly established and remedied i for that pcrticular snubber and for other snubbers that may be generically susceptible; and (2) the affected snuober is functionally f tested in the as found condition and determined OPERABLE per Specifi-cations 4.7.10.d and 4.7.10.e. However, w S a the fluid port of a l

hydraulic snubber h found to be uncoveren, the snubber shall be determined inoperab e and cannot be deter:ined OPERABLE via functional testing for the purpc';e of establishing the next visual inspection l

" interval. All snubbers connected to an inoperable connon hydraulic fluid reservior shall be counted as inoperable snubbers.

l

c. Functional Tests At least once per 18 months during shutdown, a representative sa ple of that number of snubbers which follows the expression 35 [1 + ],

where c=7 is the allowable number of sntbSers not meeting the acceptance criteria selected by the operatur, shall be functionally tested either in place or in a bench test. For each number of snubbers above c which does not meet the functional test acceptance criteria of Specification 4.7.10.d or 4.7.10.e, and additional sample l

l selectedaccordingtotheexpression35(1+[)( y)2 (,_ c) shall be functionally tested, where a is the total number of snubbers found inoperabla during the functional testing of the representative sample.

Functional testing shall continue according to the_ expression f

b[35(1+l)2]wherebisthenumberofsnubbersfound inoperable in the previous re-sample, until no additional inoperable snubbers are found within a sample or until all snubbers in Table 3.7-4a and 3.7-4b have been functionally tested.

NORTH ANNA - UNIT 1 3/4 7-29a

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

The representative sample selected for functional testing shall include the various configurations, operating environments and the range of size and capacity of snubbers. At least 25% of the snubbers in the representative sample shall include snubbers from the following three categories:

1. The first snubber away from each reactor vessel nozzle
2. Snubbers within 5 feet of heavy equipment (valve, pump, turbine, motor, etc.).
3. Snubbers within 10 feet of the discharge from a safety relief valve.

Snubbers identified in Tables 3.7-4a and 3.7-4b as "Especially Difficult to Remove" or in "High Radiation Zones During Shutdown"

. shall also be included in the representative sample.* Tables 3.7-4a and 3.7-4b may be used jointly or separately as the basis for the sampling plan.

In addition to the regular sample,' snubbers which failed the previous functional test shall be retested during the next test period. If a spare snubber has been installed in place of a failed snubber, then both the failed snubber (if it is repaired and installed in another position) and the spare snubber shall be retested. Test results of these snubbers may not be included for the re-sampling.

If any snubber selected for functional testing either fails to lockup or fails to move, i.e., frozen in place, the cause will be evaluated and if caused by manufacturer or design deficiency all snuobers of the same design subject to the same defect shall be functionally tested. This testing requirement shall be independent af the requirements stated above for snubbers not meeting the functional test acceptance criteria.

For the snubber (s) found inoperable, an engineering evaluation shall be performed on the components which are supported by the snubber (s).

The purpose of this engineering evaluation shall be to determine if the components supported by the snubber (s) were adversely affected by the inoperability of the snubber (s) in order to ensure that the supported component remains capable of meeting the design service.

Permanent or other exemptions from functional testing for individual snubbers in these categories may be granted by the Commission only if a justifiable basis for exemption is presented and/or snubber life destructive testing was performed to qualify snubber operability for cll design conditions at either the completion of their fabrication or at a subsequent date.

NORTH ANNA - UNIT 1 3/4 7-29b

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

d. Hydraulic Snubbers Functional Test Acceptance Criteria The hydraulic snubber functional test shall verify that:
1. Activation (restraining action) is achieved within the specified range of velocity or acceleration in both tension and compression.
2. Snubber bleed, or release rate, where required, is withip the specified range in compression o' tension. For snubbers spccifically required to not displace under continuous load, the ability of the snubber to withstand load without displacement shall be verified.
e. Mechanical Snubbers Functional Test Acceptance Criteria The mechanical snubber functional test shall verify that:
1. The force that initiates free movement of the snubber rod in either tension or compression is less than the specified maximum drag force. Drag force shall not have increased more than 50% since the last functional test.
2. Activation (restraining action) is achieved within the specified range of velocity cr acceleration in both tension and compression.
3. Snubber release rate, where required, is within the specified range in compression or tension. For snubbers specifically required not to displace under continuous load, the ability of the snubber to withstand load without displacement shall be i verified.

l

f. Snubber Service Life Monitoring A record of the service life of each snubber, the date at which the designated service life commences and the installation and mainte-nance records on which the designated service life.is based shall be maintained as required by Specification 6.10.2.

Concurrent with the first inservice visual inspection and at least once per 18 months thereafter, the installation and maintenance records for each snubber listed in Tables 3.7-4a and 3.7-4b shall be reviewed to verify that the indicated service life has not been exceeded or will not be exceeded prior to the next scheduled snubber NORTH ANNA - UNIT 1 3/4 7-29c

o .

~

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 5 service life review. If the indicated service life will be exceeded prior to the next scheduled snubber service life review, the snubber service life shall be reevaluated or the snubber shall be replaced or reconditioned so as to extend its service life beyond the date of the next scheduled service life review. This reevaluation, replacement or reconditioning shall be indicated in the records.

o

(

a 9

NORTH ANNA - UNIT 1 3/4 7-29d

Table 3.7-4a (Continued) .

SAFETY RELATED HYDRAULIC SNUBBERS

  • El i 2

2, SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION g NO.

ESPECIALLY DIFFICULT ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE

>=

(A or I) (Yes or No) (Yes or No)

E

~

--i

- 804 CH-225-A I Yes No 805 CH-225-A I Yes 1

No 807 CH-238-1 I Yes Yes 808 CH-238-1 I Yes Yes 803 CH-232-6 I No Yes 811 CH-251-12 I Yes No

); 800 CH-262-A I Yes No

[ 801 CH-262-A I Yes o No 810 CH-263-12 I Yes Yes l 809 CH-236-12 I Yes Yes 812 CH-236-8 I Yes Yes 813 CH-236-8 I* Yes Yes f

k

Table 3.7-4a (Continued) -

2 SAFETY RELATED HYDRAULIC SNUBBERS

  • E SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION 3 ESPECIALLY DIFFICULT g NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE 70NE** TO REMOVE (A or I) (Yes or No) (Yes or No)

E Z

~ 814 CH-251-C I Yes No 802 CH-262-C I Yes Yes 815 CH-235-C I Yes Yes 859 CH-226-10 A No No 860 CH-222-11 A No No R

a 187 CH-244-12 I Yes No y 186 CH-244-12 I Yes No M

185 CH-251-12 I Yes Yes 842 CH-251-6 A No No 189 CH-244-Pent A No No 190 CH-244-Pent A No Yes 191 CH-244-Pent A No No

)

Table 3.7-4a (Continued)

  • 5 E

I SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT 3 NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE **

y (A or I) (Yes or No)

TO REMOVE (Yes or No)

E l 188 CH-244-Pent A No No 1

806 CH-2S1-A I '

Yes No 203A QS-338-11 I No Yes 203B QS-338-11 I No Yes 207 QS-267-11 A No 1

No 209A QS-338-2 I No Yes

209B QS-338-2 I No Yes

, R

  • 600 QS-2S6-11\ I Yes Yes

?

M 800 QS-274-QSH A No No 801 QS-274-QSH A No No

802 QS-272-QSH A No No 803 QS-270-QSH A No No 804 QS-270-QSH A No No

Table 3.7-4a (Continued) -

SAFETY RELATED HYDRAULIC SNUBBERS

  • S

-.4 SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT

!! NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE i- (A or I) (Yes or No) (Yes or No)

C j 5 l

( [ 100 RC-247-A I Yes No

?-

101 RC-246-A I Yes No 102 RC-234-18 I No Yes j 104 RC-278-P I Yes Yes i 1

105 RC-278-P I Yes Yes

,, 106 RC-308-P I Yes No s

(( 107 RC-308-P I Yes No b$ 108 RC-232-9 3/4 I No Yes 109 RC-235-6 I Yes Yes 110 RC-234-6 I Yes Yes 111 RC-247-C I Yes No

Table 3.7-4a (Continued)

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT E NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE s (A or I) (Yes or No) (Yes or No) i

.E.

  • 112 RC-247-C I Yes No 113 RC-259-P I Yes Yes 114A RC-260-8 I Yes Yes 114B RC-258-P I Yes Yes 115A - RC-308-P I, Yes Yes 4

1158 RC-308-P I Yes Yes k 116A RC-308-P I Yes Yes 5a 1168 RC-308-P I Yes Yes 117 RC-308-P I Yes No 118 RC-308-P I Yes No '

119A 'RC-306-P I Yes No 1198 RC-306-P I Yes No l

l l

Table 3.7 *a (Continued) ,

aAFETY RELATED HYDRAULIC SNUBBERS

  • Sa SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT

$ NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 5 (A or I) (Yes or No) (Yes or No) 8 E

120 RC-310-P I Yes No 121 RC-302-P I Yes Yes 122 RC-303-P I Yes Yes 123 RC-303-P I Yes Yes 124A RC-306-P I Yes No 124B RC-306-P I Yes No i G3

! 3 12S RC-306-P I Yes Yes y

g 126 RC-307-P .I Yes No 127 RC-307-P I Yes No 128 RC-302-P I Yes Yes 129 RC-301-P I Yes No 130 RC-302-P I Yes No 1

O Table 3.7-4a (Continued) ,

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 d

SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT ON, LCCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE

!! NO.

5 (A or I) (Yes or No) (Yes or No)

EE 131A RC-306 P I Yes No 1318 RC-306-P I Yes No i

132 RC-307-P I Yes No 133 RC-302-P I Yes Yes l 134 RC-304-P I Yes Yes 135 RC-304-P I Yes Yes 136A RC-306-P I Yes Yes s

136B RC-306-P I Yes No

[

b$ 136C RC-306-P I Yes Yes 137 RC-306-P I Yes No 450 CC-229-RCB I Yes Yes 853 RC-256-A I Yes Yes 856 RC-256-A I Yes Yes

Table 3.7-4a (Continued) 2 SAFETY RELATED HYDRAULIC SNUBBERS

  • 3

+

[ SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT g NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE

> (A or I) (Yes or No) (Yes or No) i E

, [ 847 RC-256-A I Yes Yes 848 RC-256-B I Yes Yes 849 RC-256-C I Yes Yes 852 RC-266-C I Yes Yes 855 RC-256-C I Yes Yes 854 RC-256-B I Yes 'les w

5 851 RC-256-B I Yes Yes u

h 858 RC-256-C I Yes Yes 857 RC-256-B I Yes Yes 850 RC-235-A I Yes Yes 817 RC-235-6 I Yes Yes 818 RC-236-6 I Yes Yes i

i

Table 3.7-4a (Continued) -

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 m

SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT E NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 55 (A or I) (Yes or No) (Yes or No) .

E 821 RC-238-18 I ff Yes Yes 822 RC-236-1 I Yes Yes 833 RC-243-B I Yes Yes 826 RC-243 " I Yes No 827 RC-24 -r I Yes No 834 RC- -

I Yes No 837 RC-244-A I Yes No w .

3; 838 RC-244-A I Yes No g 842 RC-246-A I Yes Yes 843 RC-247-A I Yes No 835 RC-243-B I Yes No 839 RC-243-B I Yes No

)

Table 3.7-4a (Continued)

SAFETY RELATED HYDRAULIC SNUBBERS

  • 3 a
  • SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT SNUBBER

$ NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE s (A or I) (Yes or No) (Yes or ho)

I E

  • 840 RC-2'54-A I Yes No 841 RC-243-A I Yes Yes 819 RC-236-A I Yes Yes 832 RC-243-B I Yes No 820 RC-236-17 I Yes Yes 831 RC-243-B I Yes No w -

% 823 RC-243-C I Yes No

. u g 824 RC-243-C I Yes No 860 RC-261-B I Yes Yes 862 RC-261-B I Yes Yes 864 RC-258-B I Yes Yes 865 RC-258-B I Yes Yes

Table 3.7-4a (Continued)

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 A

SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT E NO. ON, LOCATION (ELEVATION-AREA}_f INACCESSIBLE ZONE ** TO REMOVE 5 (A or I) (Yes or No) (Yes orIvo)

E '

863 RC-260-B I Yes Yes 868 RC-258-B I Yes Yes 828 RC-244-A I Yes Yes 829 RC-244-A I Yec Yes 830 RC-244-A I Yes No 861 RC-261-B I Yes No w

3 869 RC-258-C I Yes Yes 880 RC-261-C I Yes Yes 871 RC-261-C I Yes Yes 879 RC-258-C I Yes Yes i

859 i RC-256-R I Yes Yes 866 RC-257-B I Yes Yes

Table 3.7-4a (Centinued) .

2 SAFETY RELATED HYDRAULIC SNUBBERS

  • S M ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT 3 SNUBBER- SYSTEM SNUBBER INSTALLED TO REMOVE g NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** __ i

> (A or I) (Yes or No) (Yes or No)

E p Yes

,_, 870 RC-256-C I Yes 877 RC-263-C I- Yes Yes 876 RC-258-C I Yes Yes 890 RC-258-A I Yes Yes 878 RC-258-C I Yes Yes  :

882 RC-260-A I Yes Yes 884 RC-261-A I Yes Yes w

1 889 RC-258-A I Yes Yes 872 RC-261-C I Yes Yes 887 RC-258-A I Yes Yes 886 RC-258-A I Yes Yes 888 RC-258-A I Yes Yes t

Table 3.7-4a (Continued) ,

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 5
  • ESPECIALLY DIFFICULT

. SNUBBER SYSTEM SNUBBER Iii3T.^.1 LED ACCESSIBLE OR HIGH RADIATION ON, LOCATION (ELEVATION-AFA) # INACCESSIBLE ZONE ** TO REMOVE E NO.

5 (A or I) (Yes or No) (Yes or No) e 1 E

883 RC-250-A I Yes Yes 885 RC-260-A I Yes Yes 873 RC-262-C I Yes Yes 875 RC-256-C I Yes Yes 893 RC-268-9\ I . Yes No 889A RC-268-9\ I Yes No w 891 RC-260-C I Yes Yes 3

y 890A RC-298-9 I Yes Yes l E i N 111A RC-298 9\ I Yes No 892 RC-261-C I Yes Yes l

867 RC-258-B I Yes Yes 881 RC-258-A I Yes Yes I

e

4 t

Table 3.7-4a (Continued) l SAFETY RELATED HYDRAULIC SNUBBERS

  • O w

SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT

$ NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 5 (A or I) (Yes or No) (Yes or No)

B E

100A RC-265-P I Yes No 101A RC-265-P I Yes No 102A RC-265-P I Yes No 103A RC-265-P I Yes No 104A RC-264-A I Yes Yes 105A RC-264-A I Yes Yes M

[ 106A RC-264-B I Yes Yes b 107A RC-264-B I Yes Yes 108A RC-264-C I Yes Yes 109A RC-264-C I Yes Yes 138 RC-238-9 3/4 I No Yes 139 RC-252-11 I Yes Yes

Table 3.7-4a (Continued) l I

2 SAFETY RELATED HYDRAULIC SNUBBERS

  • S 2

3 SNUhBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT E

NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE i

(A or I) (Yes or No) (Yes or No)

E M

140 RC-245-11 I Yes No 53-46 RC-249-A I Yes No 53-46A RC-249-A I Yes No 217-4 RC-243-D I Yes Yes 223-4 RC-303-P I Yes No N

9

Table 3.7-4a (Continued)

SAFETY RELATED HYDRAULIC SNUBBERS

  • 8 I SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT g NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE g , (A or I) (Yes or No) (Yes or No) i E

-4 100A RH-228-8 A No No 1008 RH-228-8 A No No 100C RH-228-8 A No No 1000 RH-228-8 A No No 100E RH-228-8 A No No 101A RH-228-5 A No No R 102A RH-228-5 A No Yes a

y 102B RH-228-5 A No Yes u

103A RH-228-3 A No Yes 103B RH-228-3 A No Yes 103C RH-228-3 A No Yes 104A RH-233-4 I Yes No

Table 3.7-4a (Continued) 2 SAFETY RELATED HYDRAULIC SNUBBERS

  • E-i

[, SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT g NO. ON, LOCATION (ELEVATION-AdEA) f INACCESSIBLE ZONE ** TO REMOVE

> (A or I) (Yes or No) (Yes or No)

I E

(( 105A RH-225-A I No Yes 106A RH-244-4 I Yes Yes 107A RH-229-3 A No Yes 1078 RH-229-3 A No Yes 107C RH-229-3 A No Yes 108A RH-237-2 A No Yes

[ 1088 RH-237-2 I Yes Yes 109A RH-245-3 I Yes Yes 1098 RH-245-3 I Yes Yes 109C k RH-245-3 I Yes Yes 1090 RH-245-3 I Yes Yes 110A RH-240-5\ I Yes No 110B RH-240-5 I Yes No i

Table 3.7-4a (Continued) -

, , SAFETY RELATED HYDRAULIC SNUBBERS

  • S a

SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT E NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 5 (A or I) (Yes or No) (Yes or No) i E

[ 110C RH-240-515 I Yes No 1100 RH-240-94 I- Yes No 111A RH-227-4 I Yes Yes 111B RH-227-4 I Yes Yes 112A RH-224-4 I Yes Yes 113A RH-224-4 I Yes Yes g 113B RH-224-4 I Ye , Yes v.

u 114A RH-224-4 I Yes No E

115A RH-234-4 I Yes Yes 116A RH-229-4 I Yes Yes 117A RH-224-4 I Yes No 118 RH-224-6 I Yes Yes 119 RH-240-5 I Yes Yes 452 RH-234-7 I Yes Yes

Table 3.7-4a (Continued) ,

SAFETY RELATED HsDRAULIC SNUBBERS

  • 3 SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT E NO. CN, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 5 (A or I) (Yes ar No) (Yes or No)

E 202 RS-267-16 I No Yes 204A RS-338-9 I No Yes 204B RS-338-9 I No Yes 205A RS-338-10 I No Yes 2058 RS-338-10 I No Yes 206A RS-338-2 I No Yes

{ 206B RS-338-2 I No Yes 208-A RS-338-2 I No Yes

{

co 208-B RS-338-2 I No Yes

136A RS-305-P A No No t

I .

^mm %M-

$+W im.e. . .<u 1,0~ <.'4 T.ST TARGET (MT-3) i l.0 ' an tu g

y @ llE 1 l.I 'Q." EE 3 2

1.25 'l IA i.6 i_ _

t

/ 4 6"

  1. 4 4' A

Rg4,,xxx)/ $+). 4h4 i . 1 o h . . - - . _ _ -

M iM 4'$'\\) 4

  1. <>h%.

\\\\

4 IMAGE EVALUATION is .\\\\

TEST TARGET (MT-3) 1.0 l#EE EM M

&m m Bu l,l ' ., * !b x

' lla 1.25 1.4 li.6

_ i_

/ < 6" *

  • r*% +<*sp

$ 'h Iz p k f ,,, >

ct.3 . ,IS 's .

(

Table 3.7-4a (Continued)

SAFETY RELATED llYDRAULIC SNUBBERS

  • 5 i d
  • ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT SNUBBER SYSTEM SNUBBER INSTALLED ZONE ** TO REMOVE ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE -

$ NO.

(A or I) (Yes or No) (Yes or No) l 5

i C

S Yes

  • 200 SHP-291-RCA I No I No Yes 201A SHP-291-RCA I No Yes 201B SHP-291-RCA I No Yes l 202A SHP-291-RCA I No Yes 202B SHP-291-RCA I No Yes I 210 SHP-291-RCA A No Yes

' 211A SHP-297-MSVH A No Yes R 211B SHP-297-MSVil A No Yes 212A 'SHP-297-MSVH

$ A No Yes 2128 SHP-297-MSVH A No Yes 213A SHP-297-MSVH A No Yes 213B SHP-297-MSVH A No No 230 SHP-297-MSVil A No No 231 SHP-297-MSVil A No No 232 SHP-297-MSVil

~

A No Yes 261 SHP-277-MSVH A No No 262 SHP-282-MSVH

Table 3.7-4a (Continued) .

2 SAFETY RELATED HYDRAULIC SNUBBERS

  • S

-i SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT k5 NO. ON, LOCATION (ELEVATION-APEA) INACCESSIBLE ZONE ** TO REMOVE (A or I) (Yes or No) (Yes or No)

I E

263 SHP-307-MSVH A No No

[

264 SHP-307-MSVH A No No 265 SHP-307-MSVH A No No 266 SHP-282-MSVH A No No i 267 SHP-307-MSVH A No No j 268 SHP-307-MSVH A No No 2

269 SHP-282-MSVH A No No

$ 233 SHP-282-MSVH A No No 234 SHP-282-MSVH A No No

[o 1 236 SHP-282-MSVH A No No 235 SHP-297-MSVH A No No l

237 SHP-297-MSVH A No No 1

i

t Table 3.7-4a (Continued) -

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 E
  • SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT 3 NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 5 (A or I) (Yes or No) (Yes or No) i E

23P SHP-282-MSVH A No No 462 SHP-297-MSVH A No No 452 SHP-297-MSVH A No No 472 SHP-297-MSVH A No No 270 SHP-307-MSVH A No No

246 SHP-291-TBM A No Yes i~

247 SHP-288-TBM A No Yes

! w

] 2 248 SHP-288-TBM A No Yes l s l g 249 SHP-273-TBM A No No i 250 SHP-268-TBB A No Yes l 251 SHP-287-TBM A No Yes i 252 SHP-267-TBB A No Yes 4

i

Table 3.7-4a (Continued) ,

' SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 E HIGH RADIATION ESPECIALLY DIFFICULT 2 SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE

];

ji (A or I) (Yes or No) (Yes or No)

I E '

253 SHP-267tTBB I No Yes f

254 SHP-267-TBB I No Yes .

255 SHP-277-TBM A No Yes I ,

256 SHP-274-TBB A No Yes 157 SHP-294-TBM A No Yes 258 SHP-294-TBM A No Yes 259 SHP-294-TBM A No Yes R

  • No No 260A SHP-277-MSH A

, y 260B SHP-277-MSH A No No

) 83 220A SHP-300-SB A No Yes i i 220B i SHP-300-SB A No No 221A SHP-300-SB A No Yes 1

l

I Table 3.7-4a (Continued) .

2 SAFETY RELATED HYDRAULIC SNUBBERS

  • S 9

3 SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT E NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE

> (A or I) (Yes or No) (Yes or No)

E q

~ 221B SHP-300-SB A No No 222A SHP-300-SB A No Yes 222B SHP-300-SB A No No 224A SHP-300-SB A No Yes 224B SHP-3' 3-SB A No Yes 225A SHP-300-SB A No No 225B SHP-300-SB A No No M

  • 226 SHP-300-SB A No No 7

$ 227A SHP-300-SB -

A No No 227B SHP-300-SB A No Yes 228A SHP-300-SB A No No 228B SHP-300-SB A No No 229 SHP-300-SB A No No

+

Table 3.7-4a (Continued) ,

SAFETY RELATED HYDRAULIC SNUBRERS*

S SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RAbit. TION ESPECIALLY DIFFICULT E NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE if (A or I) (Yes or No) (Yes or No)

E

j 217A SHP-297-MSVH A No Yes 1

2178 SHP-297-MSVH A No Yes 218A SHP-297-MSVH A No Yes 2138 SHP-297-MSVH A No Yes 219A SHP-297-MSVH A No Yes 219B SHP-297-MSVH A No Yes 209A SHP-291-RCA I Yes Yes

y 209B SHP-291-RCS I Yes Yes

! 223A SHP-291-RCA I Yes Yes 223B SHP-291-RCA I Yes Yes 23A SHP-290-MSVH A No No 23B SHP-290-MSVH A No No l

1 e

Table 3.7-4a (Continued) .

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 '

G

  • SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT E NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE ji (A or I) (Yes or No) (Yes or No) i E

30A SHP-290-MSVH A No No

.0B SHP-290-MSVH A No No 38A SHP-290-MSVH A No No 38B (HP-290-MSVH A No No 203 SHP-isi-RCA I Yes Yes 204 SHP-291-RCA I Yes Yes 205 SHP-291-RCA I Yes Yes

-a 1 206 SHP-291-RCA I Yes Yes 5 207 SHP-291-RCA I Yes Yes Y

208 SHP-291-RCA I Yes Yes

Table 3.7-4a (Continued) .

SAFETY RELATED llYDRAULIC SNUBBERS

  • 5 4
  • ACCESSIBlF OR HIGH RADIATION ESPECIALLY DIFFICULT SNUBBER SYSTEM SNUBBER INSTALLED ON, LOCATION (ELEVATION-AREA) # INACCESS dLE ZONE ** TO REMOVE E NO.
f. (A or I) (Yes or No) (Yes or No)

I E ~

400A SI-258-13 I No Yes 4008 SI-258-13 I No Yes 400C SI-258-13 I No Yes 4000 SI-258-13 I No Yes SI-256-SG A No No R

a 101A No No

? 1018 SI-256-SG A SI-256-SG A No No 102A SI-256-SG A No No 102B SI-2LJ-SG A No No 104A

Table 3.7-4a (Cont ) .

SAFETY RELATED HYDRAULI' .BERS*

! S

-i

! SNUBBER SYSTEM SNUBBER. INSTALLED ACCESSIBL. . t HIGH RADIATION ESPECIALLY DIFFICULT

$ NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 9 (A or I) (Yes or No) (Yes or No)

E 104B SI-256-SG A No No 105 SI-256-SG A No No 106 SI-256-SG A No No 100 SI-257-B A No Yes 101 SI-257-B I No Yes 101D SI-257-B I No Yes

{ 101C SI-257-B I No Yes

{

w 102C SI-221-B A No No 103A SI-238-C I Yes Yes

103B SI-238-C I Yes Yes 4

l 103C SI-238-C I Yes Yes 104 SI-221-C A No No

Ta' ale 3.7-4a (Continued) .

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 5

SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT s NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 5 (A or I) (Yes or No) (Yes or No)

e

, E l 105A SI-238-A I No Yes 105B SI-238-A I No Yes

) 105C SI-238-A I, No Yes .

106A SI-221-A A No No 107 SI-256-SG A No No , ,

108 SI-256-SG A No No

, 109 SI-250-A I _ Yes No 110 SI-219-A A No No i 111 SI-241-1 A No No w

l ) 112 SI-256-SG A No No i

T' 113 SI-256-SG A No No w

451 SI-238-9 I Yes Yes 700 SI-256-SG A No No 701 SI-256-SG A No No I

702 SI-256-SG A No No j 703 SI-256-SG~ A No No i

1

Table 3.7-4a (Lo,tinued) .

SAFETY RELATED HYDRAULIC SNUBBERS

  • S

-i SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT

$ NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 5 (A or I) (Yes or No) (Yes or No) i E

200 WFPD-291-RCA A No No 201 WFPD-291-RCA A No No 202 WFPD-291-RCA A No No 203 WFPD-291-RCA A No No 204 WFPD-291-RCA A No No 205 WFPD-291-RCA A No Yes 206 WFPD-291-RCA A No No

{

7 2b7 WFPD-291-RCA A No No 0

208 WFPD-291-RCA A No No 209 WFPD-291-RCA A ;io No 210 WFPD-291-RCA A No No 211 WFPD-291-RCA A No No O

Table 3.7-4a (Continued) ,

SAFETY l' ELATED HYDRAULIC SNUBBERS

  • S e

SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT

$ NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE S (A or I) (Yes or No) (Yes or No)

E

[ 212 WFPD-291-RCA A No No 216 WFPD-282-MSVH /> No No 217 WFPD-282-MSVH A No No 218 WFPD-282-MSVH A No No R

a y 222 WFPD-272-MSVH A No No 223 WFPD-272-MSVH A No No 224 WFPD-272-MSVH A No No 231A WFPD-291-RCA A No Yes i

s

n Table 3.7-4a (Continued) ,

SAFETY RELATED HYDRAULIC SNUBBERS

  • 8 a

. 1

  • ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT SNUBBER SYSTEM SNUBBER INSTALLED ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE

$ NO.

(Yes or No)

S (A or I) (Yes or No) i E

WFPD-291-RCA A No Yes 231B WFPD-291-RCA A No Yes 231C WFPD-291-RCA A No Yes 2310 WFPD-291-RCA A No No 235 WFPD-291-3 I Yes No .,

600 #

M a

N

Table. 3.7-4a (Continued)

SAFETY RELATED HYDRAULIC SNUBBERS

  • 2 3

52 ACCESSIBLE OR HIGH RADIATIOE ESPECIALLY DIFFICULT SNUBBER SYSTEM SNUBBER INSTALLED TO REMOVE 3

ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE **

E NO.

> ( A or I) (Yes or No) (Yes or No) i E

q A No No

~ 213 FW-300-SB No No FW-300-SB A 214 No No FW-300-SB A 215 l

No No FW-300-SB A 226A l

No No FW-300-SB A 226B No No A

$ 227A FW-300-SB No No A

o 227B FW-300-SB No No FW-300-SB A 228 No No 229 FW-300-SB A No No FW-300-SB A 230

' ' ' ~ - - - ' b

Table 3.7-4a (Continued)

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 E
  • HIGH RADIAi10N ESPECIALLY DIFFICULT SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE GR ZONE ** TO REMOVE R NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE (A or I) (Yes or No) (Yes or No) 5 7

E q

ea A No Yes 245A FW-295-FWH A No Yes 245B FW-295-FWH

f. No Yes 246 FW-295-FWH A No No 233 SDHV-307-MSVH A No No 233A SDHV-307-MSVil M No No
  • 234 SDHV-307-MSVil A Y No Yes SDHV-307-MSVH A

$ 235 A No No 236 SDHV-297-MSVil

5

o Y

Table 3.7-4a (Continued) l SAFETY RELATED HYDRAULIC SNUBBERS

  • i E SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT U NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE (A or I) (Yes or No) (Yes or No) 200 WS-256-SG A No No 201 WS-256-SG A No No 202 WS-244-ABB A No No 203 WS-244-ABB A No No 204A WS-244-ABB A No No y 204B WS-244-ABB A No Yes

[ 206 WS-244-ABB A No No na 207 WS-244-ABB A No No 208 WS-244-ABB A No No 205A WS-244-ABB A No No f 205B WS-244-ABB A No Yes I

i

g Table 3.7-4a (Continued) .

h SAFETY RELATED HYDRAULIC SNUBBERS

  • 3E SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT

' ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE NO.

E (A or I) (Yes or No) (Yes or No)

--i 405 CC-224-Pent A No Yes 407 CC-224-Pent A No No w

1 y

di 411 CC-255-Pent A No No 412 CC-252-Pent A No No 413 CC-256-Pent A No No 202 FC-249-FBB I No No 204 FC-249-FBB I No No

Table 3.7-4a (Continued)

_, SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 i 1'

SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT'

!! NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 5 (A or I) (Yes or No)

I (Yes or No) -

E 1

1 WGCB-246-A I Yes Yes 2 WGCB-246-C I Yes Yes IA WGCB-244-Pent I Yes No 2A WGCB-244-Pent I Yes No l

103 WGCB-279-TBM I No Yes i

104 WGCB-279-TBM I No Yes 10 4

. s I %a i

I

Table 3.7-4a (Continued) .

SAFETY RELATED HYDRAULIC SNUBBERS

  • 5 5
c ESPECIALLY DIFFICULT SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION R NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE y (A or I) (Yes or No) (Yes or No)
e E

, U 237 SAE-307-MSVH A No No i ~

238 SAE-307-MSVH A No No j 239 SAE-307-MSVH A No No i

240 SAE-307-MSVH A No No 241 SAE-307-MSVH A No No 242 SAE-307-MSVH A No No I

g 2d SAE-297-MSVH A No No B

y 244 SAE-297-MSVH A No No

$ 243 SAE-297-MSVH A No No

)

1

)

e 4

't Table 3.7-4a (Continued) ,

SAFETY RELATED HYORAULIC SNUBBERS

  • 5 4

'C SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT

$ NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE s (A or I) (Yes or No) (Yes or No)

I E

246 SAE-279-AFW A No No 247 SAE-279-AFW A No No i

248 SAE-279-AFW A No No 4

249 SAE-279-AFW A No No 250 SAE-279-AFW A No No w 251 SAE-279-AFW A No No 3

y 252 SAE-279-AFW A No No c'n s' 253 SAE-279-AFW A No No 254 SAE-279-AFW A No No 255 SAE-279-AFW A No No 256 SAE-279-AFW A ,

No No 257 SAE-279-AFW " A No No I t i

Table 3.7-4a (Continued) .

SAFETY RELATED HYDRAULIC SNUBBERS

  • S a

SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT E NO. ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE 1 9 (A or I) (Yes or No) (Yes or No)

E 280 SAE-305-MSVH A No Yes 281 SAE-305-MSVH A No Yes 282 SAE-305-MSVH A No Yes l R

a a

o-s e

I Table 3.7-4b (Continued) .

~

l SAFETY RELATED MECHANICAL SNUBBERS

  • 2 S

a

[, SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT ON, LOCATION (ELEVATION-AREA) # INACCESSIBLE ZONE ** TO REMOVE E5 NO.

Si (A or I) (Yes or No) (Yes or No)

I E

p No 118 CFPD-304-3 I Yes 119 CFPD-304-3 I Yes No 221 CFPD-304-13 I Yes No CFPD-304-13 I Yes No 224 se N

M' i

TABLES 3.7-4a AND 3.7-4b (Continued)

TABLE NOTATIONS

  1. LOCATION ABBREVIATIONS Abbreviations Area A Cubicle A B Cubicle B C Cubicle C Pent. Penetration Area Aux. Bldg.

P Pressurizer Cubicle RCA Reactor Containment Annulus MSVH Main Steam Valve House MSH Main Steam Header Turb. Bldg.

TBM Turbine Bldg. Mezzanine TBB Turbine Bldg. Basement j l

SB Service Bldg.

l

! SG Safeguards Bldg.

FWH Feadwater Header - Turb. Bldg.

l ABB Auxiliary Bldg. Basement l

FBB Fuel Bldg. Basement l

AFW Auxiliary Feedwater Pump House NOTE: Numbers indicate radial locations in reactor containment.

  • Snubbers may be added to and deleted from safety related systems without prior License Amendment to Tables 3.7-4a and 3.7-4b p 'ovided that a revision to Tables 3.7-4a and 3.7-4b is included with the next License Amendment request.
    • Modifications to this table due to changes in nigh radiation areas may be made without prior License Amendment provided that a revision to Tables 3.7-4a 3.7-4b is included with the next License Amendment request.

NORTH ANNA - UNIT 1 OfA 7-66 l

T PLANT SYSTEMS BASES 3/4.7.9.1 AND 3/4.7.9.2 RESIDUAL HEAT REMOVAL SYSTEM (RHR)

The OPERABILITY of the RHR system ensures that residual heat removal capability is available below 350*F follo4ng plant shutdown.

The RHR system is not part of the ECCS system.

3/4.7.10 SNUBBERS All snubbers are required OPERABLE to ensure that the structural i integrity of the reactor-coolant system and all other safety related systems is maintained during and following a seismic or other event initiating dynamic

loads. Snubbers excluded from this inspection program are those installed on nonsafety-related systems and then only if their failure or failure of the j system on which they are installed, would have no adverse effect on any safety-l related system.

The visual inspection frequency is based upon maintaining a constant l level of snubber protection to systems. Therefore, the required inspection interval varies inverpely with the observed snubber failures and is determined

! by the number of inoperable snubbers found during an inspection. Inspections performed before that interval has elapsed may be used as a new reference point to determine the next inspection. However, the results of such early inspections performed before the original required time interval has elapsed (nominal time less 25%) may not be used to lengthen the required inspection interval. Any inspection whose results require a shorter inspection interval will override the previous schedule.

When the cause of the rejection of a snubber is clearly established and remedied for that snubber and for any other snubbers that may be generically l susceptible, and verified by inservice functional testing, that snubber may be exempted from being counted as inoperable. Generically susceptible snubbers

, are those which are of a specific make or model and have the same design features directly related to rejection of the snubber by visual inspection, or are similarly located or exposed to the same environmental conditions such as I

temperature, radiation, and vihaation.

When a snubber is found inoperable, an engineering evaluation is

~

performed, in addition to the determination of the snubber mode of failure, in order to determine if any safety-re ited component or system has been adversely j affected by the inoperability of th. snubber. The engineering evaluation l shall determine whether or not the snubber mode of failure has imparted a significant effect or degradation on the supported component or system.

To provid assurance of snubber functional reliability, a representative sample of the installed snubbers will be functionally testti during plant shutdowns at 18 months intervals. Observed failures of these sample snubbers shall require functional testing of additional units.

i NORTH ANNA - UNIT 1 B 3/4 7-6 l

L

PLANT SYSTEMS BASES ,

The service life of a snubber is evaluated via manufactu. er input and information through consideration of the snubber service conditions and associated 'astallation and maintenance records (newly installed snubber, seal replaced, spring replaced, in high radiation area, in high temperuuure area, etc...). The requirement to monitor the snubber service life is ir.cluded to ensure that the snubbers periodically undergo a performance evaluation in view of their age and operating conditions. These records wi M provide statistical bases for future consideration of snubber service life. The requirements for the maintenance of records and the snubber service life review are not intended to affect plant operation.

3/4 7.11 SEA.ED SOURCE CONTAMINATION The limitations on sealed source removable contamination ensure that the total body or individual organ irradiation does not exceed allowable limits in the event of ingestion or inhalation of the source material. The limitations on removable contamination for sources requiring leak testing, including alpha emitters, is besed on 10 CFR 70.39(c) limits for plutonium. Leakage of sources excluded from the i requirements of this specification represent less than one maximum I l

permissible body burden for total body irradiation if the source material is inhaled or ingested. Sealed sources are classified into three groups according to their use, with surveillance requirements commensurate with the probability of damage to a source in that group. Those sources which are frequently handled are required to be tested more often than those which are not. Sealed scarces which are continuously enclosed within a shielded mechanism (i.e., sealed sources within radiation monitoring or boron measuring devices) are considered to be stored and need not be tested unless they are removed from the shield i mechanism.

NORTH ANNA - UNIT 1 B 3/4 7-7

INDEX ADMINISTRATIVE CONTROLS SECTION PAGE Consultants..................................................... 6-8 Meeting Frequency............................................... 6-8 Review.......................................................... 6-8 Authority....................................................... 6-9 Records......................................................... 6-9 6.5.3 QUALIlY ASSURANCE DEPARTMENT Function........................................................ 6-10 Authority....................................................... 6-10 Records......................................................... 6-11 6.6 REPORTABLE OCCURRENCE ACTI0N................................. 6-12 6.7 S A F ETY L I M I T V I O LAT I O N. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12 6.8 PROCEDURES AND PR0 GRAMS...................................... 6-13 6.9 REPORTING REQUIREMENTS 6.9.1 ROUTINE REPORTS AND REPORTABLE OCCURRENCES................. 6-14 l 6.9.2 SPECIAL REP 0RTS............................................ 6-18 6.10 RECORD RETENTION............................................ 6-20 6.11 RADI ATION PROTECTION PR0G RAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21 6.12 HIGH RADIATION AREA......................................... 6-22 6.13 ENVIRONMENTAL QUALIFICATION................................. 6-23 NORTH ANNA-UNIT 1 XIX

TABLE 3.3-3 (Continued)

ACTION 17 - With the number of OPERABLE Channels one less than the Total Number of Channels operation may proceed provided the inoperable channel is placed in the tripped condition within I hour and the Min; mum Channels OPERABLE requirement is met, one additional channel may be bypassed for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing per Specification 4.3.2.1.1.

ACTION 18 - With the number of OPERABLE Channels one less than the Total Number of Channels, restore the inoperable channel to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be ir. at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

ACTION 19 - With the number of OPERABLE Channels one less than the Total Number of Channels, STARTUP and/or POWER OPERATION may proceed provided the following conditions are satisfied:

a. The inoperable channel is placed in the tripped condition within I hour.
b. The Minimum Channels OPERABLE requirements is met; however, one additional channel may be bypassed for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing per Specification 4.3.2.1.1.

ACTION 20 - With the number of OPERABLE Channels one less than the Total Pumber of Channels, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in at least HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />; however, one channel may be bypassed for up to I hour for uurveillanec testing per Specification 4.3.2.1.1 provided the other Channel is OPERABLE.

ACTION 21 - With the number of OPERABLE Channels one less than the Tctal 4

Number of Channels, restore the inoperable Channel to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in at least HOT SHUTDOWN within the following ,

6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. 1 1

NORTH ANNA - UNIT 1 3/4 3-22 Amendment No.

5 TABLE 3.3-4 (Continued) i ENGINEERED SAFETY FEATURE I.CTUATION SYSTEM INSTRUMENTATION TRIP SETPOINTS E

E ALLOWABLE VALUES i FUNCTIONAL UNIT TRIP SETPOINT j

E 6. AUXILIARY FEEDWATER PUMP START q

~

N. A. N. A.

a. Manual N. A. N. A.

. b. Automatic Actuation Logic 2 18% of narrow range 2 17% of narrow range

c. Steam Generator Water instrument span each instrument span each Level Low-Low steam generator steam generator w

i I D d. S.I.

See 1 above (All S.I. Setpoints) 2 57.5'% Transfer Bus Voltage 2 52.5% Transfer Bus Voltage

e. Station Blackout i

N. A.

i f. Trip of Main Feed Pu% N. A.

t

7. LOSS OF POWER 4.16 kv Emergency Bus Undervoltage 2999 i 60 volts with a 2912 1 60 volts with a j a.

3 1 0.03 second time delay (Loss of Voltage) 2.2 1 0.03 second time delay 1

b. 4.16 kv Emergency Bus Undervoltage 3744 1 1.4 volts with a 3619 1 1.4 volts with a 60 1 3 second time delay 75 1 3 second time delay (Degraded Voltage) i i

i 4

4 s__._ ___m-m __. .o. . . . --2.. .w.;

TABLE 4.3-2 (Continued) 5 4

I ENGINEERED SAFETY FEATURE ACTUATION SYSTEM INSTRUMENTATION ,

SURVEILLANCE REQUIREMENTS g CHANNEL NODES IN WHICH

, CHANNEL CHANNEL FUNCTIONAL SURVEILLANCE

c. FUNCTIONAL UNIT CHECK CALIBRATION TEST REQUIRED 5

-4 5. TURBINE TRIP AND FEEDWATER ISOLATION

a. Steam Generator Water S R H 1, 2, 3 Level--High-High
6. AUXILIARY FEEDWATER P11MPS w a. Manual .a . A . N. A. M(1) 1, 2, 3 h b.

y Automatic Actuation M. A. N. A. M(2) 1, 2, 3 logic .

w

c. Steam Generator Water S R H 1, 2, 3, 4 Level--Low-Low
d. S.I. See 1 above (all S'.I. Surveillance Requirements)
e. Station Blackout N. A. R N. A. 1, 2, 3, 4
f. Main Feedwater Pump N. A. N. A. R 1, 2 Trip ,
7. LOSS OF POWER 4.16 KV Emergenev Bus
a. Loss of Voltage N. A. R M(2) 1, 2, 3
b. Degraded Voltage N. A. R M(2) 1, 2, 3

ADMINISTRATIVE CONTROLS 6.9 REPORTING REQUIREMENTS ROUTINE REPORTS AND REPORTABLE OCCURRENCES 6.9.1 In addition to the applicable reporting requirtments of Title 10, Code of Federal Regulations, the following reports shall De submitted to the Director of the Regional Office of Inspection and Enforcement unless otherwise noted.

STARTUP REPORTS 6.9.1.1 A summary report of plant startup and power escalation testing shall be submitted following (a) receipt of an operating license, (2) amendment to the license involving a planned increase in power level, (3) installation of fuel that has a different design or has been manufactured by a different fuel supplier, and (4) modifications that may have significantly altered the nuclear, thermal, or hydraulic performance of the plant.

6.9.1.2. The startup report shall address each of the tests identified in the FSAR and shall include a description of the measured values of the operating conditions or characteristics obtained during the test program and a comparison of these values with design predictions and specifications. Any corrective actions that were required to obtain satisfactory operation shall also be described. Any additional specific details requested in license conditions based on other commitments shall be included in this report.

6.9.1.3 Startup reports shall be submitted within (1) 90 days following completion of the startup test program, (2) 90 days following resumption or commencement of commercial power operatien, or (3) 9 months following initial criticality, whichever is earliest. If the Startup Report does not cover all three events (i.e., initial criticality, completion of startup test program, and resumption or commencement of commercial power operation), supplementary reports shall be submitted at least every three months until all three events h;ve been completed.

l NORTH ANNA - UNIT 1 6-14 Amendment No.

PLANT SYSTEMS 3/4.7.10 SNUB 8ERS LIMITING CONDITION FOR OPERATION l

1 7.10 All snubbers listed in Tables 3.7-4a and 3.7-4b shall be OPERABLE. l 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, 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 4.7.10.c on the supported component or declare the supported system inoperable and follow the appropriate ACTION statement for that system.

SURVEILLANCE REQUIREMENTS 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. Visual Inspections The firs't inservice visual inspection of snubbers shall be performed after four months but within 10 months of commencing POWER OPERATION and shall include all snubbers listed in Tables 3.7-4a and 3.7-4b.

i If less than two (2) snubbers are found inoperable during the first inservice visual inspection, the second inservice visual inspection shall be performed 12 months i 25% from the date of the first inspection. Otherwise, subsequent visual inspections shall be performed in accordance with the following schedule:

~

l No. Inoperable Snubbers Subsequent Visual per Inspection Period Inspection Period *y i 0 18 months i 25%

i 1 12 months i 25%

l 2 6 months 25%

l 3,4 124 days i 25%

l 5,6,7 62 days 25%

8 or more 31 days i 25%

The snubbers may be categorized into two ,'oups: Those accessible and those inaccessible during reactor ope.ation. Each group may be inspected independently in accordance with the above schedule.

I m

, The inspection interval shall not be lenthened more than one step at a time.

l The provisions of Specification 4.0.2 are not applicable. '

l NORTH ANNA - UNIT 2 3/4 7-25

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) i

b. Visual Inspection Acceptance Criteria Visual inspections shall verify (1) that there are no visual indica-tions of damage or impaired OPERABILITY, (2) attachments to the foundation or supporting structure are secure, and (3) in those locations where snubber movement can be manually induced without l disconnecting the snubber, that the snubber has freedom of movement and is not frozen up. Snubbers which appear inoperable as a result of visual inspections may be determined OPERABLE for the purpose of establishing the next visual inspection interval, providing that (1) the cause of the rejection is clearly established and remedied for that particular snubber and for other snubbers that may be generically susceptible; and (2) the affected snubbe- is functionally tested in the as found condition and determined OPERABLE per Specifi-cations 4.7.10.d and 4.7.10.e. However, when the fluid port of a hydraulic snubber is found to be uncovered, the snubber shall be determined inoperable and cannot be determined OPERABLE via functional testing for the purpose of establishigg the next visual inspection l interval. All snubbers connected to an inoperable common hydraulic fluid reservior shall be counted as inoperable snubbers.
c. Functional Tests j At least once per 18 months'during shutdown, a representative sagple l of that number of snubbers which follows the expression 35 [1 + p],

where c-7 is the allowable number of snubbers not meeting the acceptance criteria selected by the operator, shall be functionally tested either in place or in a bench test. For each number of snubbers above c which does not meet the functional test acceptance criteria of Specification 4.7.10.d or 4.7.10.e, and additional sample selectri according to the expression 35 (1 + l} ( c 1) (a - c) shall be functionally tested, where a is the total number of snubbers found inoperable during the functicnal testing of the representative sample.

Functional testing shall continue according to the expression j

1 b[35(1+l)2]wherebisthenumberofsnubbersfound inoperable in the previous re-sample, until no additional inoperable snubbers are found within a sample or until all snubbers in Table 3.7-4a and 3.7-4b have been functionally tested.

l l

l NORTH ANNA - UNIT 2 3/4 7-26a

_ _ _ . _ . ~ . . _ _ _ _ . _ _ _ _ . _ _ _ _ . . _ _ _ _ _ ~ - - . _ _ . _ . .. -

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

The representative sample selected for functional testing shall include the various configurations, operating environments and the range of size and capacity of snubbers. At least 25% of the snubbers in the representative sample shall include snubbers from the following three categories:

1. The first snubber away from each reactor vessel nozzle
2. Snubbers within 5 feet of heavy equipment (valve, pump, turbine, motor, etc.).
3. Snubbers within 10 feet of the discharge from a safety relief valve.

Snubbers identified in Tables 3.7-4a and 3.7-4b as "Especially Difficult to Remove" or in "High Radiation Zones During Shutdown" shall also be included in the representative sample.* Tables 3.7-4a and 3.7-4b may be used jointly or separately as the basis for the sampling plan.

In addition to the regular sample, snubbers which failed the previous functional test shall be retested during the next test period. If a spare snubber has been installed in place of a failed snubber, then both the failed snubber (if it is repaired and installed in another position) and the spare snubber shall be retested. Test results of these snubbers may not be included for the re-sampling.

If any snubber selected for functional testing either fails to lockup or fails to move, i.e., frozen in place, the cause will be evaluated and if caused by manufacturer or design deficiency all snubbers of the same design subject to the same defect shall be functionally tested. This testing requirement shall be independent

l. of the requirements stated above for snubbers not meeting the functional test acceptance criteria.

For the snubber (s) found inoperable, an engineering evaluation shall be performed on the components which are supported by the snubber (s).

The purpose of this engineering evaluation shall be to determine if the components supported by the snubber (s) were adversely affected i by the inoperability of the snubber (s) in order to ensure that the supported component remains capable of meeting the design service.

Permanent or other exemptions from functional testing for individual snubbers in these categories may be granted by the Commission only if a justifiable basis for exemption is presented and/or snubber life destructive testing was performed to qualify snubber operability for all design conditions at either l the completion of their fabrication or at a subsequent date.

NORTH ANNA - UNIT 2 3/4 7-26b

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

d. Hydraulic Snubbers Functional Test Acceptance Criteria The hydraulic snubber functional test shall verify that:
1. Activation (restraining action) is achieved within the specified range of velocity or acceleration in both tension and compression.
2. Snubber bleed, or release rate, where required, is within the specified range in compression or tension. For snubbers specifically required to not displace under continuous load, the ability of the snubber to withstand load without displacement shall be verified.
e. Mechanical Snubbers Functional Test Acceptance Criteria The mechanical snubber functional test shall verify that:
1. The force that initiates free movement of the snubber rod in either tension or compression is less than the specified maximum drag force. Drag force shall not have increased more than 50% since the last functional test.-
2. Activation (restraining action) is ach,ieved within the specified range of velocity or acceleration in both tension and compression.
3. Snubber release rate, where required, is within the specified range in compression or tension. For snubbers specifically required not to displace under continuous load, the ability of the snubber to withstand load without displacement shall be verified,
f. Snubber Service Life Monitoring A record of the service life of each snubber, the dite at which the designated service life commences and the installation and mainte-nance records on which the designated service life is based shall be maintained as required by Specification 6.10.2.

Concurrent with the first inservice visual inspection and at least once per 18 months thereafter, the installation and maintenance records for each snubber listed in Tables 3.7-4a and 3.7-4b shall be reviewed to verify that the indicated servict life has not been exceeded Qr will not be exceeded prior to the neat scheduled snubber NORTH ANNA - UNIT 2 3/4 7-26c l

"LANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) service life review. If the indicated service life will be exceeded prior to the next scheduled snubber service life review, thi snubber service life shall be reevaluated or the snubber shall be replaced or reconditioned so as to extend its service life beyond the date of the next scheduled service life review. This reevaluation, replacement or reconditioning shall be indicated in the records.

t NORTH ANNA - UNIT 2 3/4 7-26d

i 2

S 14BLE 3.7-4b 51 SAFETY RELATt"0 MECHANICAL SNUBBERS

  • R s HIGH RADIATION SNUBBER SYSTEM SNUBBER INSTALLED ACCESSIBLE OR ZONE ESPECIALLY DIFFICULT E , NO. ON, LOCATION AND ELEVATION INACCESSIBLE DURING SHUTDOWN ** TO REMOVE q (A or I) (Yes or No) (Yes or No)

N I

4 l

l M w

4 i

1 1

i T

s

  • TABLES 3.7-4a AND 3.7-4b (Continued)

TABLE NOTATIONS

  1. LOCATION ABBREVIATIONS Abbreviations Area A Cubicle A B Cubicle B C Cubicle C Pent. Penetration Area Aux. Bldg.

P Pressurizer Cubicle RCA Reactor Containment Annulus RCB Reactor Containment Basement RCP Reactor Containment Penetration Area MSVH Main Steam Valve House AFPH Aux. Feedwater Pump House MSH Main Steam Header - Turb. Bldg.

TBM Turbine Bldg. Mezzanine TBB Turbine Bldg. Basement SB Service Bldg.

SG Safeguards Bldg.

QS Quench Spray Area FWH Feedwater Header - Turb. Bldg.

ABB ,

Auxiliary Bldg. Basement FBB Fuel Bldg. Basement RHR Residual Heat Removal Mezzanine NOTE: Numbers indicate radial location in reactor containment.

  • Snubbers may be added to and deleted from safety related systems without prior License Amendment to Tables 3.7-4a and 3.7-4b provided that a revision to Tables 3.7-4a and 3.7-4b is included with the next License Amendment request.
    • Modifications to this table due to changes in high radiation areas may be made without prior License Amendment provided that a revision to Tables 3.7-4a and 3.7-4b is included with the next License Amendment request.

NORTH ANNA - UNIT 2 3/4 7-49

PLANT SYSTEMS BASES _. ___

l 1 3/4.7.9.1 AND 3/4.7.s.2 RESIDUAL HEAT REMOVAL SYSTEM (RHR)

The n'" JILITY of the RHR system ensures tnat residual heat removal capability is available below 350*F following plant shutdown. Thi RHR system

is not part of the ECCS system.

l 3/4.7.10 SNUBBERS All snubbers are required OPERABLE to ensure that the structural integrity of the reactor coolant system and all other safety related systems is maintained during and following a seismic or other event initiating dynamic loads. Snubbers excluded from this inspection program 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.

The visual inspection frequency is based upon maintaining a constant level of snubber protection to systems. Therefore, the required inspection interval varies inversely with the' observed snubber failures and is determined by the number of inoperable snubbers found during an inspection. Inspections performed before that interval has elapsed may be used as a new reference point to determine the next inspection. However, the results of such early ,

inspections performed before the original required time interval has elapsed (nominal time less 25%) may not 'be used to lengthen the required inspection interval. Any inspection whose results require a shorter inspection interval will override the previous schedule.

When the cause of the rejection of a snubber is clearly established and remedied for that snubber and for any other snubbers that may be generically susceptible, and verified by inservice functional testing, that snubber may be exempted from being counted as inoperable. Generically susceptible snubbers are those which are of a specific make or model and have the same design features directly related to rejection of the snubber by visual inspection, or are similarly located or exposed to the same environmental conditions such as temperature, radiation, and vibration.

When a snubber is found inoperable, an engineering evaluation is performed, in addition to the determination of the snubber mode of failure, in order to determine if any safety-related component or system has been adversely affected by the inoperability of the snubber. The engineering evaluation shall determine whether or not the snubber mode of failure has imparted a significant effect or degradation on the supported component or system.

To provide assurance of snubber functional reliability, a representative sample of the installed snubbers will be functionally tested during plant shutdowns at 18 months intervals. Observed failures of these sample snubbers shall require functional testing of additional units.

NORTH ANNA - UNIT 2 8 3/4 7-6 l

l_~_.,_ _ __ _ . _ , __ - _ _ . . , _ . _ _ _ _ . _ _ _ _ . _ _ _ _ _ _ , _ _ . . _ _ . , _ _ . . , . . _ . _ , _ , _ _ - - , - . , - . - - -

I PLANT SYSTEMS BASES The service life of a snubber is evaluated via manufacturer input and information through consideration of the snubber service conditions and associated installation and maintenance records (newly installed snubber, seal replaced, spring replaced, in high radiation area, in high temperature area, etc...). The requirefrent to monitor the snubber service life is included to ensure that the snubbers periodically undergo a performance evaluation in view of their age and opartiting conditions. These records will provide statistical bases for future cinsideration of snubber service life. The requirements for the maintenance of records and the snubber service life review are not intended to affect plant operation.

NORTH ANNA - UNIT 2 B 3/4 7-6a

Attcchment 3 Paga 1 DISCUSSION OF PROPOSED TECHNICAL SPECIFICATION CHANGE NORTH ANNA UNIT NO. 1 By a letter dated November 20, 1980, the NRC Staff requested the submittal of a license amendment application to incorporate applicable portions of the revised inservice surveillance requirements for snubbers in the North Anna Unit No. 1 Technical Specifications. The proposed Technical Specification changes for North Anna Unit I are discussed below.

The revisions to the Unit 1 Technical Specifications include revised surveil-lance requirements for visual inspections and for functional tests for hydraulic snubbers and mechanical snubbers. The existing functional test requirement specifies that a representative sample of 10% of each type of snubber should be functionally tested at least once per 18 months. An optional method offered. by the November 20, 1980 letter for defining the size of a functional test representative sample is a formula based upon a variable "c", which is defined by the license and approved by the Staff. The defini-tion of c=7 will result in a representative sample size of approximately 33%

of each type of snubber for the functional tests. This representative sample size coincides with our program of rebuilding and functionally testing all snubbers every five years. A program of this magnitude will reduce the failure rate and increase the reliability of all snubbers installed at North Anna Unit 1.

Included in the proposed revisions are functional test - acceptance criteria for mechanical snubbers, which are presently not part of the North Anna Unit 1 Technical Specifications. Mechanical snubbers have recently been installed as a result of the Multi-Structure Amplified Response Spectra (ARS) effort for Unit 1; therefore, the requirements for mechanical snubber functional test acceptance criteria are now being included in the North Anna Unit 1 Technical Specifications. All appropriate references associated with mechani-cal snubber requirements are being included. In addition, a safety-related mechanical snubber table is being added and designated as Table 3.7-4b and the existing Table 3.7-4 is being redesignated as Table 3.7-4a.

The proposed revisions also included a requirement for maintaining records of the service lives of all hydraulic and mechanical snubbers listed in Table 3.7-4a and Table 3.7-4b for the duration of the Operating License.

l Surveillance requirements relating to monitoring of snubber service life are specified in Specification 4.7.10.f.

l In our letters dated March 13, 1981 (Serial No. 119) and March 16, 1981 (Serial No. 119A), we requested changes to the North anna Unit 1 Technical Specifications to delete six hydraulic snubbers and add one hydraulic snubber to Table 3.7-4 of Specification 3/4.7.10. As a result of the ARS reanalysis, additional modifications were made to the supports of the Safety Injection Piping System in the containment and safegua.-ds building, quench spray piping system in che containment, residual heat removal piping system in the contain-

. ment, component cooling system in the containment and auxiliary building basement, main steam system in the service building, and the chemical feed piping system in the containment. As a result of these modificaticas, snubber 451 at location SI-238-9, snubber 600 at location QS-256-11, snubber 452 at b

Attachment 3 Pags 2 location RH-234-7, snubber 453 at location CC-244-7 , snubbers 700, 701, 702, and 703 at location SI-256-SG, snubbers 224A and 224B at location SHP-300-SB, and snubber 413 at location CC-256-ABB should be added to Table 3.7-4a of the Technical Specifications. Snubbers 118 and 119 at location CFPD-304-3 and snubbers 221 and 224 at location CFPD-304-13 should be added to the proposed Table 3.7-4b. The location-area, accessibility, and determination of high radiation zone should be changed for snubber 600 at location WFPD-291-RCA, which was added in our license amendment request dated March 13, 1981. This snubber was previously located outside the crane wall and was moved inside the crane wall, thus resulting in these changes in classification. The exist-ing Table 3.7-4 lists two snubbers, snubbers 22aA and 228A at location ,

SHP-300-SB, of which one of these snubbers was replaced with a larger snubber as a result of the ARS effort. Upon revie+; of Table 3,7-4, the numbering discrepancy was noted; therefore, one of the snubbers 228A at loca*. ion SHP-300-SB should be redesignated as snubber 228B.

The implementation of the revised inservice surveillance requirements for snubbers will improve overall snubber operability throughout the unit due to improved surveillance and functional test requirements. In addition, the requirement for maintaining records of service lives for hydraulic and mechanical snubbers for the duration of the Operating License will assist in identifying ongoing problems with snubber service lives and thereby improve snubber operability.

l t

i l

u

Attschment 4 Page 1 DISCUSSION OF PROPOSED TECHNICAL SPECIFICATION CHANGE NORTH ANNA UNIT NO. 2 By a letter dated November 20, 1980, the NRC Staff requested the submittal of a license amendment application to incorporate applicable portions of the revised inservice surveillance requirements for snubbers in the North Anna Unit No. 2 Technical Specifications. The proposed Technical Specification changes for North Anna Unit 2 are discussed below.

The revisions to the Unit 2 Technical Specifications include revised surveil-lance requirements for visual inspections and for functional tests for hydraulic snubbers and mechanical snubbers. The existing functional test requirement specifies that a representative sample of 10% of each type of snubber should be functionally tested at least once per 18 months. An optional method offered by the November 20, 1980 letter for defining the size of a functional test representative sample is a formula based upon a variable "c", which is defined by the license and approved by the Staff. The defini-tion of c=7 will result in a representative sample size of approximately 33%

of each type of snubber for the functional tests. This representative sample

$ size coincides with our program of rebuilding and functionally testing all snubbers every five years. A program of this magnitude will reduce the failure rate and increase the reliability of all snubbers installed at North Anna Unit 2.

l Included in the proposed revisions are functional test acceptance criteria for mechanical snubbers, which are presently not part of the North Anna Unit 2 Technical Specifications. Mechanical snubbers are not presently installed in North Anna Unit 2; however, to facilitate the revision of the Unit 2 Technical Specifications as a result of any future installation of mechanical snubbers, the requirements for mechanical snubber functional test acceptance criteria are now being included in the North Anna Unit 2 Technical Specifications. All appropriate references associated with mechanical snubber requirements are l

also being included.

1 In addition, the proposed revisions include a requirement for maintaining records of the service lives of all hydraulic and mechanical snubber listed in Tables 3.7-4a and 3.7-4b for the duration of the Operating License.

Surveillance requirements relating to monitoring of snubber service life are specified in Specification 4.7.10.f.

The implementation of the revised inservice surveillance requirements for snubbers will improve overall snubber operability throughout the unit due to improved surveillance and functional test requirements. In addition, the requirement for maintaining records of service lives for hydraulic and mechanical snubbers for the duration of the Operating License will assist in identifying ongoing problems with snubber service lives and thereby improve snubber operability.

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