ML20206C672

Corrected Amend 47 to License DPR-34,modifying Tech Specs to Allow Replacement of Mechanical Snubbers W/Hydraulic Snubbers

ML20206C672
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Site:	Fort Saint Vrain
Issue date:	06/12/1986
From:	NRC
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ML20206C642	List: ML20206C638 ML20206C672
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NUDOCS 8606190538
Download: ML20206C672 (16)

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ATTACHMENT TO LICENSE AMENDMENT N0. 47 TO FACILITY OPERATING LICENSE N0. DPR-34 DOCKET NO. 50-267 Replace the following pages of the Appendix A Technical Specifications with the attached pages as indicated. The revised pages are identified by amendment number and contain vertical lines indicating the areas of change.

Remove Insert 4.3-7 4.3-7 4.3-8 4.3-8 4.3-9 4.3-9 4.3-10 4.3-10

. 4.3-11 4.3-11 4.3-12 4.3-12 4.3-13 4.3-13 4.3-14 4.3-14 4.3-15 4.3-15 4.3-16 4.3-16

. 5.3-9 5.3-9 5.3-10 5.3-10 5.3-11 5.3-11 5.3-15 5.3-15 5.3-17 5.3-17 8606190538 860612 PDR P

ADOCK 05000267 PDR

Fort St. Vrain 01

, Technical Specifications Amendmen2 No. 47 Page 4.3-7

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Specification LCO 4.3.10 - Shock Suppressors (Snubbers) -

Limiting Condition for operation a) The reactor shall not be operated at power unless all shock suppressors (snubbers) on Class I piping systems l (listed in Table 4.3.10-1) are operable except as noted in b) through d) of this LCO.

b) With one or more snubbers inoperable in a Class I

. system or subsystem, 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 SR 5.3.8.c) on the supported component i e or declare the supported system inoperable and follow the appropriate action statement for that system.

c) If the requirements of a) and b) of this LCO cannot be

. met, an orderly shutdown shall be initiated and the reactor shall be in a low power condition within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

d) If a shock suppressor is determined to be inoperable while the reactor is in the shutdown or refueling mode, the suppressor shall be made operable or replaced prior to reactor operation at power.

e) Shock suppressors may be added to Class I systems without prior License Amendment to Table 4.3.10-1,

Fort St. Vrain el

, Technical Specifications Amendment No. 47 Page 4.3-8 l provided a revision to Table 4.3.10-1 is included with a subsequent License Amendment request.

Basis for Specification LCO 4.3.10 Shock suppressors (snubbers) are designed to prevent unrestrained pipe motion under dynamic loads, as might occur during an earthquake, while allowing normal thermal motion during startup and shutdown. The consequence of an inoperable snubber is an increase in the probability of structural damage to piping resulting from the dynamic loads produced by a seismic event. It is therefore necessary that all snubbers required to protect the i Class I systems, subsystems, or components be operable during reactor power operation.

Because snubber protection is required only during relatively low probability events, a period of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> is allowed for repair or replacement. In case a shutdown is required, the allowance of 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> to reach a low power condition will permit an orderly power reduction consistent with standard operating procedures. Since -

i reactor operation at power should not be conducted with defective safety-related eculpment, reactor power operation is prohibited with inoperable snubbers, except as stated above.

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• Fort St. Vrain el Technical Specifications Amendment No. 47 Page 4.3-9 TABLE 4.3.10-1 CLASS I SHOCK SUPPRESSORS Turbine Water Drain Snubbers TWDS-1 TWDS-7 TWDS-2 TWDS-8 TWDS-3 TWDS-9 TWDS-4 TWDS-10 TWDS-5 TWDS-12 TWDS-6 TFDS-13 TWDS-14 Cold Reheat Snubbers - Circulators CRS-Cl-1 CRS-C3-1 CRS-Cl-2 CRS-C3-2 CRS-Cl-3 CRS-C3-3

.;- - -CRS-Cl-4 CRS-C3-4 CRS-Cl-5 CRS-C3-5 CRS-Cl-6 CRS-C3-6 CRS-C2-1 CRS-C4-1 CRS-C2-2 CRS-C4-2 CRS-C2-3 CRS-C4-3 CRS-C2-4 CRS-C4-4

. CRS-C2-5 CRS-C4-5

, CRS-C2-6 CRS-C4-6

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Fort St. Vrain el Technical Specifications Amendment No. 47 Page 4.3-10 TABI,E 4.3.10-1 (Continued) l CI. ASS I SHOCK SUPPRESSORS (Continued)

Cold Reheat Snubbers CRS-29 CRS-377 CRS-591 CRS-870 CRS-31 CRS-378 CRS-632 CRS-871 CRS-72 CRS-379 CRS-636 CRS-872 CRS-76 CRS-381 CRS-664 CRS-879 CRS-104 CPS-382 CRS-674 CRS-880 CRS-114 CRS-386 CRS-707 CRS-881 .

CRS-144 CRS-388 CRS-742 CRS-902 CRS-146 CRS-389 CRS-751 CRS-910 CRS-187 CRS-420 CRS-752 CRS-911 CRS-191 CRS-421 CRS-765 CRS-921 CRS-219 CRS-422 CRS-766 CRS-931 CRS-229 CRS-431 CRS-768 CRS-951 CRS-262 CRS-445 CRS-769 CRS-955 CRS-297 j CRS-446 CRS-821 CRS-962 CRS-317-1 CRS-474 CRS-822 CRS-964 E CRS-317-2 CRS-476 CRS-827 CRS-967 CRS-320 CRS-517 CRS-828 CRS-969 CRS-321 CRS-521 CRS-829 CRS-972 CRS-323 CRS-549 CRS-831 CRS-976 CRS-324 CRS-556-1 CRS-832 CRS-977 CRS-371 CRS-556-2 CRS-836 CRS-978

. CRS-372 CRS-589 CRS-838

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i Boiler Feed Snubbers-Steam Generators BFS-B1-1 BFS-B1-4 BFS-B2-1 BFS-B2-4 '

BFS-B1-2 BFS-B1-5 BFS-52-2 BFS-B2-5 BFS-B1-3 BFS-B1-6 BFS-B2-3 BFS-B2-6 l

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Fort St. Vrain 01 Technical Specifications Amendment No. 47 Page 4.3-11 TABLE 4.3.10-1 iContinued) l CLASS I SHOCK SUPPRESSORS (Continued)

Hot Reheat Snubbers HRS-23 HRS-193 HRS-348 HRS-507 HRS-24 HRS-194 HRS-349 HRS-515 HRS-26 HRS-196 HRS-351 HRS-520 HRS-58 HRS-201 HRS-356 HRS-525 HRS-59 HRS-202 HRS-357 HRS-540 HRS-61 HRS-205 HRS-378 HRS-546 HRS-69 HRS-220 HRS-379 HRS-561

- HRS-94 HRS-243 HRS-381 HRS-566 HRS-95 HRS-244 HRS-413 HRS-571 HRS-98 HRS-246 HRS-414 HRS-576 HRS-101 HRS-278 HRS-416 HRd-577 '

HRS-103 HRS-279 HRS-421 HRS-957 HRS-104 HRS-281 HRS-422 ' HRS-958 HRS-105 HRS-289 HRS-428 HRS-961 HRS-128 HRS-314 HRS-468 HRS-966 '

e. HRS-129 - HPS-315 HRS-470 HRS-971 HRS-131 HRS-313 HRS-501 HRS-972 HRS-158 HRS-321 HRS-505 HRS-985 HRS-159 HRS-324 HRS-506 HRS-990 HRS-161

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. Emergency Condensate Snubbers ECS-1 ECS-8 ECS-15-1 ECS-20 ECS-2 ECS-9 ECS-15-2 ECS-21 ECS-3 ECS-10 ECS-16 ECS-22 ECS-4 ECS-11 ECS-17 ECS-23 ECS-5 ECS-12 ECS-18 ECS-24 ECS-6 ECS-13 ECS-19 ECS-25 ECS-7 ECS-14

Fort St. Vrain el Technical Specifications Amendmant No. 47 Page 4.3-12 TABLE 4.3.10-1 (Continued) l CLASS I SHOCK SUPPRESSORS (Continued)

Helium Vent Snubbers KVS-1-1 HVS-2-1 HVS-3-1 HVS-4-1 HVS-1-2 HVS-2-2 KvS-3-2 HVS-4-2 Emergency Boiler Feed Snubbers

, BFS-14E BFS-142E BFS-245E BFS-374E BFS-ISE BFS-143E BFS-257E BFS-380E BFS-16E BFS-154E BFS-260E BFS-398E BFS-26E BFS-158E BFS-263E BFS-399E BFS-29E BFS-167E PTS-264E BFS-405E BFS-30E BFS-181E BFS-268E BFS-414E BFS-31E BFS-197E BFS-269E BFS-417E i

BFS-47E BFS-203E BFS-316E BFS-419E j  ;. BFS-53E BFS-204E BFS-317E BFS-421E BFS-56E BFS-210E BFS-320E BFS-422E BFS-57E BFS-216E BFS-344E BFS-423E BFS-74E BFS-218E BFS-345E BFS-430E BFS-76E BFS-219E BFS-359E BFS-431E BFS-77E BFS-2?9E BFS-364E BFS-432E BFS-89E BTS-229E BFS-366E BFS-442E -

i BFS-12,2E BFS-243E BFS-367E BFS-444E

, BFS-141E BFS-244E 1

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Fort St. Vrain #1

• ' Technical Specifications Amendment No. 47 Page 4.3-13 TABLE 4.3.10-1 (Continued) l CLASS I SHOCK SUPPRESSORS (Continued)

Main Steam Snubbers MSS-9 MSS-125 MSS-281 MSS-584 MSS-16 MSS-126 MSS-284 MSS-688 MSS-17 MSS-135-1 MSS-291 MSS-696 MSS-18 MSS-139 MSS-304 MSS-706 MSS-19 MSS-145-1 MSS-311 MSS-717 MSS-27 MSS-145-2 MSS-312 MSS-718

, MSS-29 MSS-145-3 MSS-314 MSS-719 MSS-44 MSS-146 MSS-321 MSS-721 MSS-51 MSS-147 MSS-339 MSS-774 MSS-52 MSS-149 MSS-346 MSS-778 MSS-54 MSS-184 MSS-347 MSS-779 MSS-61 MSS-191 MSS-348 MSS-822-1 MSS-64 MSS-192 MSS-356 MSS-831 MSS-74 MSS-194 MSS-369 MSS-833 g MSS-81 MSS-201 MSS-376 MSS-834 MSS-82 MSS-204 MSS-377 MSS-835 MSS-84 MSS-206 MSS-379 MSS-836 MSS-85-1 MSS-222 MSS-414 MSS-862 MSS-85-2 MSS-225 MSS-421 MSS-869 MSS-95B MSS-227 MSS-422 MSS-870 MSS-95C MSS-239 MSS-424 MSS-871 MSS-109 MSS-246 MSS-431 MSS-901

, MSS-116 MSS-247 MSS-433 MSS-906 MSS-117 MSS-248 MSS-451 MSS-909 MSS-118 MSS-249 MSS-452 MSS-911 MSS-120-1 MSS-257 MFS-453 MSS-912 MSS-120-2 MSS-258 MS?-495 MSS-987 MSS-120-3 MSS-274 MSS-583A MSS-988

Fort St. Vrain 01

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• Technical Specifications Amendment No. 47 Page 4.3-14 TABLE 4.3.10-1 (Continued) l CLASS I SHOCK SUPPRESSORS (Continued)

Boiler Feed Snubbers  ;

BFS-8 BFS-235 BFS-435 BFS-556 BFS-25 BFS-239 BFS-437 BTS-563 BFS-28 BFS-256 BFS-451 BFS-564 BFS-35 BFS-256-1 BFS-467 BFS-566 BFS-40 BFS-282 BFS-468 BFS-572 BFS-53 BFS-297 BFS-477 BFS-573 BFS-53A BFS-325 BFS-479 BFS-577 BFS-54 BFS-352 BFS-498 BFS-614 BFS-61 BFS-358 BFS-500 BFS-641 BFS-97 BFS-397 BFS-501 BFS-679 BFS-110 BFS-398 BFS-516 BFS-711 BFS-117 BFS-400 BFS-523 BFS-763 BFS-138 BFS-402 BFS-526 BFS-764 BFS-139 BFS-412 BFS-528 BFS-796 BFS-142 BFS-416 BFS-529 BFS-820 4- BFS-149 BFS-420 BFS-530 BFS-823 BFS-152 BFS-4?1 BTE -5 32 BFS-843 BFS-353 BFS-422 BFS-534 BFS-844 BFS-166 BFS-425 BFS-536 BFS-870 BFS-210 BFS-434-1 BFS-537 BFS-871 BFS-211 BFS-434-2 BFS-553-1 BFS-922 l

" 'BFS-216 BFS-434-3 BFS-553-2 BFS-933 BFS-221 w-e i

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Fort St. Vrain el Technical Specifications Amendment No. 47 Page 4.3-15 TABLE 4.3.10-1 (Continued) l CLASS I SHOCK SUPPRESSORS (Continued)

Hydraulic Oil Snubbers HOS-1 HOS-22 HOS-46 HOS-72 HOS-2 HOS-23 HOS-48 HOS-73 HOS-3 HOS-24 HOS-49 HOS-74 HOS-4-1 HOS-25 HOS-50 HOS-75 HOS-4-2 HOS-27 HOS-51 HOS-76

! HOS-5 HOS-28 HOS-52 MOS-77 HOS-6 HOS-29 HSO-53 HOS-78

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HOS-7 HOS-30 HOS-54 NOS-79 HOS-8 HOS-31 NOS-55 HOS-80

, HOS-9 HOS-33 HOS-56 HOS-81 HOS-10 NOS-34 HOS-57 HOS-82 i HOS-11 HOS-35 HOS-58 HOS-83 HOS-13 HOS-36 HOS-59 HOS-84 HOS-14 NOS-37 HOS-60 HOS-85 HOS-15 HOS-38 HOS-61 HOS-66

. HOS-16 HOS-39 HOS-63 HOS-87 HOS-17 HOS-40 HOS-64 HOS-88 HOS-18 FOE-41 HOS-65 HOS-89 HOS-19 HOS-42 MOS-66 HOS-90 HOS-20 HOS-45 MOS-71 HOS-91 HOS-21 i

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Vent Stack Snubbers VSS-101 VSS-108 VSS-114 VSS-120 VSS-102 VSS-110 VSS-116 VSS-122 VSS-104 VSS-111 VSS-117 VSS-123 VSS-105 VSS-113 VSS-119 VSS-124 VSS-107

Fort St. Vrain el

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• Technical Specifications Amendment No. 47 Page 4.3-16 l TABLE 4.3.10-1 (Continued)

CLASS I SHOCK SUPPRESSORS (Continued)

System 22 22-7-SN1 22-23-SN2 22-73-SN1 22-128-SN1 22-11-SN1 22-30-SN1 22-73-SN2 22-132-SN1 22-23-SN1 22-68-SN1 22-100-SN1 22-132-SN2 System Instrumentation I-72-SN1 I-73-SN2 I-179-SN1 I-179-SN2 I-73-SN1 Vent Stack Snubbers E VSS-103 VSS-109 VSS-115 VSS-121 VSS-106 VSS-112 VSS-118 i

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Fort St. Vrain el Technical Specifications Amendment No. 47 Page 5.3-9 activity level decreases to less than 10% of the limit of LCO 4.3.8, at which time weekly sampling may be resumed.

Basis for Specification SR 5.3.7 The specification surveillance interval is adequate to monitor the activity of the secondary coolant.

l Specification SR 5.3.3 - Shock Suppressors (grubbers)

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, g Surveillance The following surveillance requirements apply to all l Class I piping system shock suppressors (snubbers) :

. a) Visual Inspections The first in-service visual inspection of snubbers shall be performed within six months from issuance of l ,this Technical Specification (Amendment 47 ) . For the purpose of entering the schedule described in this section, it shall be assumed that the facility had been on a six-month inspection interval.

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Fort St. Vrain 01

. Technica9 Specifications Amendmen? No. 47 Page 5.3-10 The first in-service visual inspection of snubbers l shall include all snubbers listed in Tables 4.3.10-1.

If less than two snubbers are found inoperable during the first in-service visual inspection, the second in-service visual inspection shall be performed 12 months l plus or minus 25% from the date of the first inspection. Otherwise, subsequent visual inspections shall be performed in accordance with the folloving schedule:

Number of Inoperable Snubbers per Inspection Subsequent Visual Period Inspection Period

, A 0 18 Months plus or minus 25%

1 12 Months plus or minus 25%

2 6 Months plus or minus 25%

3, 4 124 Days plus or minus 25% ~

5, 6, 7 62 Days plus or minus 25%

8 or more 31 Days plus or minus 254 -.

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.. *The inspection interval shall not be lengthened more

. than one step at a time, b) Visual Inspection Acceptance Criteria Visual inspections shall verify (1) that there are no visible indications 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 disconnecting the snubber, that the snubber has freedom of movement and is not frozen-up. Snubbers which appear inoperable as a result of visual l

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Fort St. Vrain 01

, . Technical Specifications Amendment No. 47 Page 5.3-11 inspections may be determir.ed operable for the purpose of establishing the next visual inspection interval, providing that (1) the cause of the rejection is clearly established and recedied for that particular snubber and for other snubbers that may be generically susceptible, and (2) the a f fected snubber is functionally tested in the as-found condition and determined operable per Section 5.3.8.d) and 5.3.8.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 establishing.the next visual inspection interval. All snubbers connected to an inoperable common hydraulic fluid reservoir shall be counted as inoperable snubbers.

c) Functional Tests At least once per 18 months (not to exceed 22 1/2 months), a representative sample of each type of j

snubber shall be tested using one of the following ,

g sample plans: The sample plan (s) shall be selected prior to the test period and cannot be changed during the test period. The NRC Regional Administrator shall be notified in writing of the sample plan (s) selected i

for each type of snubber prior to the test period or the sample plan (s) used in the prior test period shall be implemented:

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, 1) At least 10% of the total of the type of snubber shall be functionally tested either in-place or in a bench test. For each snubber of that type that does not meet the functional test acceptance i

criteria of Specification SR 5.3.8.d) or SR .

5.3.8.e), an additional 10% of that type of I i I

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Fort St. Vrain el Technical Specifications I Amendmeng No. 47 l Page 5.3-15 '

, i f) Exemption From Visual Inspection or Functional Tests Permanent or other exemptions from the surveillance program for individual snubbers may be granted by the Commission is a justiffable basis for exemption is presented. Snubbers so exempted shall continue to be l listed in Table 4.3.10-1.

g) Record Keeping Record keeping shall consist of:

1) A historical record for each snubber shall be maintained.

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2) Concurrent with the first in-service visual inspection and at least once per refueling cycle thereafter, the historical records for each l

snubber listed in Table 4.3.10-1 shall be reviewed to determine any trends that may adversely affect service life.

3) The maximum expected service life for the various _.

seals, seal materials, and applications shall be determined and established based on engineering information and the seals shall be replaced so that the maximum expected service life will not be exceeded during a period when the snubber is required to be OPERABLE. This monitoring program shall be fully implemented within 22 1/2 months from the issuance of this Technical Specification (Amendment 39).

Fort St. Vrain el Technical Sp::cifications Amendment No. 47 Page 5.3-17 9

Basis for Specification SR 5.3.8 l All Class I shock suppressors (snubbers) are visually inspected for overall integrity and operability. The inspection will include verification of proper orientation, adequate hydraulic fluid level, when applicable, and proper attachment of snubber to piping and structures.

The inspection frequency is based upon maintaining a constant level of snubber protection. Thus, the required inspection interval varies inversely wit.h the observed I

snubber failures. The number of inoperable snubbers found during a required inspection determines the time interval for the next inspection. However, the results of such early inspection performed before the original required time interval has elapsed (nominal time less 25 percent) may not be used to lengthen the required inspection interval. Any inspection where results require a shorter inspection interval will override the previous schedule.

Experience at operating facilities has shown that the required surveillance program should assure an acceptable level of snubber performance provided that the seal materials are compatible with the operating environment.

To further increase the assurance of snubber reliability, functional tests should be performed once each refueling cycle. These tests will include stroking of the snubbers 1

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