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{{#Wiki_filter:I TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*FPL LOCATION HARK NO.NO.SYSTEM SNUBBER INSTALLED ACCESSIBLE OR ON LOCATION AND ELEVATION INACCESSIBLE A or I HIGH RADIATION ZONE**Yes or No ESPECIALLY DIFFICULT TO REMOVE Yes or No 033 034 036 037 038 039 040 041 042 043 044 047 HS 649-319 HS 548-5 HS 649-314 HS 649-314 HS 649-310 HS 649-304A HS 548-9 NS 548-9 BF 549-7 BF 549-7 BF 549-8 BF 549-17 HS, HS, MS, HS, MS, HS, HS, HS, BF, BF, BF, BF, Reactor Bldg., Reactor Bldg., Reactor Bldg., Reactor Bldg., Reactor Bldg., Reactor Bldg., Reactor Bldg., Reactor Bldg., Reactor Bldg., Reactor Bldg., Reactor Bldg., Reactor Bldg., El ev., 82'lev.82'lev.55'lev.55'lev.50'lev.30'lev.50'lev.50'lev.40'lev.40'lev.40'lev.36'A I I I A I I I I I A No No No No No No No No No No No No No Yes Yes Yes No No Yes Yes CO C7 TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*FPL LOCATION HARK NO.NO.SYSTEM SNUBBER INSTALLED ACCESSIBLE OR ON LOCATION AND ELEYAT ION INACCESSIBLE A or I HIGH RADIATION ZONE**Yes or No ESPECIALLY DIFFICULT TO REMOVE Yes or No 052 BF 549-17 BF, Reactor Bldg., Elev.36'53 SI 968-210 SI, Reactor Bldg., Elev.16'58 SI 969-1216 SI, Reactor Bldg., Elev.18'A No No No No No  
{{#Wiki_filter:I TABLE 3.7-2           Continued SAFETY RELATED HYDRAULIC SNUBBERS*
'ql TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*FPL LOCATION MARK NO.NO.SYSTEM SNUBBER INSTALLED ACCESSIBLE OR ON LOCATION AND ELEVATION INACCESSIBLE (A or I)HIGH RADIATION ESPECIALLY DIFFICULT ZONE**TO REMOVE (Yes or No (Yes or No 081 SI 676-67 SI, RAB, Elev.4'82 SI 676-67 SI, RAB, Elev.4'83 SI 676-105 SI, RAB, Elev.4'A A No No No No No No
FPL LOCATION   HARK       SYSTEM SNUBBER INSTALLED             ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT NO.      NO.      ON LOCATION AND ELEVATION             INACCESSIBLE       ZONE**         TO REMOVE A  or I      Yes or No      Yes or No 033   HS 649-319 HS, Reactor Bldg., El ev.,                                  No            No 82'lev.
>>N Ir.~il TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*FPL LOCATION MARK NO.NO.SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT ON LOCATION AND f LEYATION INACCESSIBLE ZONE**TO REMOYE A or I Yes or No Yes or No 084 SI 676-105 SI, RAB, Elev.4'12 SI 676-4505 SI, RAB, Elev.7'A No No tD CO C)
034  HS 548-5    HS, Reactor Bldg.,                            A              No            No I
TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*FPL LOCATION HARK NO.NO.SYSTEM SNUBBER INSTALLED ACCESSIBLE OR-HIGH RADIATION ESPECIALLY DIFFICULT ON, LOCATION AND ELEVATION INACCESSIBLE ZONE**.TO REMOYE A or I Yes or No Yes or No 102 HS-649-313 CC, RAB, Elev.26'No V V n SAFETY'EVALUATION Re: St.Lucie Unit 1 Docket No.50-335 Snubbers I.Introduction This evaluation supports a proposed change to Table 3.7-2 (SAFETY RELATED HYDRAULIC SNUBBERS).
82'lev.
Several snubbers on the list are deleted because they are scheduled to be replaced by mechanical snubbers during the next refueling outage (Spring 1980).Only smaller snubbers of the 3 kip (3000 inch-pounds) and 10 ki p size will be affected by the changeover (see attached list)-II.Evaluation The snubbers in question are designed and installed for seismic considerations.
036  HS 649-314  MS, Reactor Bldg.,                                           No            No 55'lev.
That is, their design function is to accommodate pipe movement caused by slow thermal expansion, but to"lock-up" to prevent potentially damaging transient movement duri ng a postulated seismic event of sufficie'nt magnitude.
037  HS 649-314  HS, Reactor Bldg.,                           I              No 55'lev.
The Pacific Scientific (PSA)mechanical snubbers which we propose to use operate on an"acceleration limiting" basis.PSA snubbers permit thermal movement since the acceleration
038  HS  649-310  MS, Reactor Bldg.,                           I              No            No 50'lev.
.associated with thermal movement is very low, but they limit seismic induced acceleration to 0.02g..Mechanical snubbers would actually allow less movement than hydraulic snubbers under seismic conditions because
039  HS  649-304A HS, Reactor Bldg.,                           A              No            Yes 30'lev.
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040  HS  548-9    HS, Reactor Bldg.,                           I              No            Yes 50'lev.
of hydraulic snubber lockup delays associated with achieving-the lockup velocity, activation of the lockup mechanism, and compression of the hydraulic fluid.Therefore, based on seismic functional requirements, the planned replacement of hydraulic snubbers with mechanical snubbers would be an improvement.
041  NS  548-9    HS, Reactor Bldg.,                           I              No            Yes 50'lev.
Pacific Scientific performed extensive testing in developing the PSA 3 (3 kip)and PSA 10 mechanical sriubbers.
042  BF  549-7    BF, Reactor Bldg.,                           I                            No 40'lev.
The purpose was to evaluate their operability under the adverse conditions expected in many applications, such as high humidity, high temperature, and vibration.
043  BF  549-7    BF, Reactor Bldg.,                            I              No            No 40'lev.
The snubbers operated favorably under all test conditions.
044  BF  549-8    BF, Reactor Bldg.,                            I                            Yes 36' 40'lev.
PSA 3 and PSA 10 mechanical snubbers are currently in use at St.Lucie (see Amendment 31 to Facility Operating License DPR-67)and at a large number of other reactor sites.The use of these snubbers has been previously evaluated by the Commission and found to be acceptable.
047  BF  549-17  BF, Reactor Bldg.,                            A                            Yes CO C7
III.Conclusions Based on testing and operating experience, the use of PSA mechanical snubbers should improve the operability of the seismic support system.In conclusion, (1)the proposed change does not increase the probability or consequences of accidents or malfunctions of equipment important to safety and does not reduce the margi n of safety as defined in the basis for any technical specification, therefore, the change does not involve a significant hazards consideration, (2)there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (3)such activities will be conducted in compliance with the Commission's regulations and the-issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.  
 
~~r Snubber Chan eout PSL The folios(ing hydraulic snubbers are scheduled to be replaced by mechanical snubbers during the Spring 1980 refueling outage: V 3 Kip Size 10 Kip Size Tag No.Hark No.Tag No.Hark No.035 061 066 073.074 076 077 079 080 086 087 088 089 090 091 092 093 096 106 107 110 111 114 HS-1076-3164 HS-549-11 (S I-970-1248)
TABLE 3. 7-2      Continued SAFETY RELATED HYDRAULIC SNUBBERS*
HS-549-11(S I-970-.1248)
FPL LOCATION    HARK      SYSTEM SNUBBER INSTALLED        ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT NO.       NO. ON  LOCATION AND ELEYATION      INACCESSIBLE      ZONE**        TO REMOVE A or I       Yes or No       Yes or No 052  BF  549-17  BF, Reactor Bldg., Elev. 36'53 No             No SI 968-210  SI, Reactor Bldg., Elev. 16'58 No SI 969-1216 SI, Reactor Bldg., Elev. 18'          A              No             No
SI-972-6240 SI-973-240 SI-973-6224 SI-868-64 SI-868-163 SI-868-410 SI-676-129 SI-676-241(SI-676-250)
 
CC-1899-48 CC-1852-6241 SPS-27 SPS-417 SPS-467 SPS-777 CC-1865-9 CH-3-40 CH-3-75 SI-676-247(SI-676-2475)
'ql TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*
S I-676-247 5A SI>>972-6240 101 103 104 105 CC-17-1 CC-21-5 CC-21-1 CC-23-2 0 iP c 4 l'I~,t}}
FPL LOCATION   MARK      SYSTEM SNUBBER INSTALLED       ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT NO.      NO. ON  LOCATION AND ELEVATION      INACCESSIBLE       ZONE**         TO REMOVE (A or I)      (Yes or No     (Yes or No 081  SI 676-67  SI, RAB, Elev.                                       No            No 4'82 SI 676-67  SI, RAB, Elev.                       A              No            No Elev. 4' 4'83 SI 676-105 SI, RAB,                             A              No             No
 
      >> N Ir  .~
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TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*
FPL LOCATION   MARK       SYSTEM SNUBBER INSTALLED       ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT NO.      NO.      ON LOCATION AND     fLEYATION  INACCESSIBLE       ZONE**         TO REMOYE A or I        Yes or No       Yes or No 084  SI 676-105  SI, RAB, Elev.                                                       No Elev. 7' 4'12 SI 676-4505 SI, RAB,                             A               No tD CO C)
 
TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*
FPL LOCATION   HARK      SYSTEM SNUBBER INSTALLED   ACCESSIBLE OR -
HIGH RADIATION ESPECIALLY DIFFICULT NO.      NO. ON, LOCATION AND ELEVATION  INACCESSIBLE         ZONE**.        TO REMOYE A or I           Yes or No       Yes or No 102  HS-649-313 CC, RAB, Elev. 26'                                                 No
 
V V  n
 
SAFETY 'EVALUATION Re: St. Lucie Unit    1 Docket No. 50-335 Snubbers I. Introduction This evaluation supports        a  proposed change to Table 3.7-2 (SAFETY RELATED HYDRAULIC SNUBBERS).            Several snubbers on the    list  are deleted because  they are scheduled to          be  replaced by mechanical    snubbers  during the next refueling outage (Spring 1980).             Only smaller snubbers    of the  3 kip (3000 inch-pounds)        and 10  ki p size  will  be affected by the changeover    (see attached      list)-
II. Evaluation The snubbers    in question are designed        and installed for seismic considerations.       That  is, their    design function is to accommodate pipe movement caused      by slow thermal expansion,        but to "lock-up" to prevent potentially    damaging    transient    movement  duri ng a  postulated seismic event of  sufficie'nt magnitude.          The  Pacific Scientific    (PSA) mechanical snubbers which      we  propose    to use operate on an    "acceleration limiting" basis. PSA  snubbers   permit thermal movement since the acceleration          .
associated    with thermal      movement    is very low, but they limit seismic induced acceleration to 0.02g.. Mechanical snubbers             would  actually allow less  movement than      hydraulic snubbers under seismic conditions because
 
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of hydraulic snubber lockup delays associated with achieving- the lockup velocity, activation of the lockup        mechanism,  and compression    of the hydraulic fluid. Therefore, based          on seismic  functional requirements, the planned replacement of hydraulic snubbers with mechanical                snubbers would be an improvement.
Pacific Scientific performed extensive testing in developing the                 PSA 3 (3  kip)  and PSA 10 mechanical    sriubbers. The purpose  was  to evaluate their operability      under the adverse conditions expected in many applications,    such as high humidity, high temperature,          and  vibration.
The snubbers     operated favorably under       all test conditions.
PSA 3  and PSA 10 mechanical      snubbers  are currently in use at St. Lucie (see Amendment 31 to      Facility  Operating License DPR-67) and at        a  large number    of other reactor sites.      The use  of these snubbers    has been previously evaluated by the Commission          and found  to  be  acceptable.
III. Conclusions Based on   testing  and  operating experience, the use of       PSA  mechanical snubbers   should improve the operability of the seismic support system.
In conclusion, (1) the proposed change does not increase the probability or consequences      of accidents or malfunctions of equipment important to safety  and does not reduce    the margi n of safety    as  defined in the basis for  any  technical specification, therefore, the change          does not    involve a  significant  hazards consideration,      (2) there is reasonable      assurance that the health      and  safety of the public will not      be endangered    by
 
operation in the proposed manner,  and (3) such activities will  be conducted in compliance with the Commission's regulations and the-issuance of  this amendment will  not be inimical to the   common defense and  security or to the health and  safety of the public.
 
    ~
r ~
Snubber Chan eout  PSL The folios(ing hydraulic snubbers are scheduled to      be replaced  by mechanical snubbers  during the Spring 1980 refueling outage:
V 3 Kip Size                                  10 Kip Size Tag No.            Hark No.                  Tag No.          Hark No.
035        HS-1076-3164                    101            CC-17-1 061        HS-549-11 (S I-970-1248)        103            CC-21-5 066        HS-549-11(S I-970-.1248)        104            CC-21-1 073  .      SI-972-6240                      105            CC-23-2 074        SI-973-240 076        SI-973-6224 077        SI-868-64 079        SI-868-163 080         SI-868-410 086         SI-676-129 087        SI-676-241(SI-676-250) 088        CC-1899-48 089        CC-1852-6241 090        SPS-27 091        SPS-417 092        SPS-467 093        SPS-777 096        CC-1865-9 106        CH-3-40 107        CH-3-75 110        SI-676-247(SI-676-2475) 111        S I-676-247 5A 114        SI>>972-6240
 
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Latest revision as of 01:31, 30 October 2019

Tech Specs Pages 3/4 7-33 Through 3/4 7-37,deleting 27 Entries from Table 3.7-2 Re Replacement of safety-related Hydraulic Snubbers
ML17207A733
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 01/09/1980
From:
FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17207A732 List:
References
NUDOCS 8001140450
Download: ML17207A733 (14)
v • d • e


Text

I TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*

FPL LOCATION HARK SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT NO. NO. ON LOCATION AND ELEVATION INACCESSIBLE ZONE** TO REMOVE A or I Yes or No Yes or No 033 HS 649-319 HS, Reactor Bldg., El ev., No No 82'lev.

034 HS 548-5 HS, Reactor Bldg., A No No I

82'lev.

036 HS 649-314 MS, Reactor Bldg., No No 55'lev.

037 HS 649-314 HS, Reactor Bldg., I No 55'lev.

038 HS 649-310 MS, Reactor Bldg., I No No 50'lev.

039 HS 649-304A HS, Reactor Bldg., A No Yes 30'lev.

040 HS 548-9 HS, Reactor Bldg., I No Yes 50'lev.

041 NS 548-9 HS, Reactor Bldg., I No Yes 50'lev.

042 BF 549-7 BF, Reactor Bldg., I No 40'lev.

043 BF 549-7 BF, Reactor Bldg., I No No 40'lev.

044 BF 549-8 BF, Reactor Bldg., I Yes 36' 40'lev.

047 BF 549-17 BF, Reactor Bldg., A Yes CO C7

TABLE 3. 7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*

FPL LOCATION HARK SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT NO. NO. ON LOCATION AND ELEYATION INACCESSIBLE ZONE** TO REMOVE A or I Yes or No Yes or No 052 BF 549-17 BF, Reactor Bldg., Elev. 36'53 No No SI 968-210 SI, Reactor Bldg., Elev. 16'58 No SI 969-1216 SI, Reactor Bldg., Elev. 18' A No No

'ql TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*

FPL LOCATION MARK SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT NO. NO. ON LOCATION AND ELEVATION INACCESSIBLE ZONE** TO REMOVE (A or I) (Yes or No (Yes or No 081 SI 676-67 SI, RAB, Elev. No No 4'82 SI 676-67 SI, RAB, Elev. A No No Elev. 4' 4'83 SI 676-105 SI, RAB, A No No

>> N Ir .~

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TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*

FPL LOCATION MARK SYSTEM SNUBBER INSTALLED ACCESSIBLE OR HIGH RADIATION ESPECIALLY DIFFICULT NO. NO. ON LOCATION AND fLEYATION INACCESSIBLE ZONE** TO REMOYE A or I Yes or No Yes or No 084 SI 676-105 SI, RAB, Elev. No Elev. 7' 4'12 SI 676-4505 SI, RAB, A No tD CO C)

TABLE 3.7-2 Continued SAFETY RELATED HYDRAULIC SNUBBERS*

FPL LOCATION HARK SYSTEM SNUBBER INSTALLED ACCESSIBLE OR -

HIGH RADIATION ESPECIALLY DIFFICULT NO. NO. ON, LOCATION AND ELEVATION INACCESSIBLE ZONE**. TO REMOYE A or I Yes or No Yes or No 102 HS-649-313 CC, RAB, Elev. 26' No

V V n

SAFETY 'EVALUATION Re: St. Lucie Unit 1 Docket No. 50-335 Snubbers I. Introduction This evaluation supports a proposed change to Table 3.7-2 (SAFETY RELATED HYDRAULIC SNUBBERS). Several snubbers on the list are deleted because they are scheduled to be replaced by mechanical snubbers during the next refueling outage (Spring 1980). Only smaller snubbers of the 3 kip (3000 inch-pounds) and 10 ki p size will be affected by the changeover (see attached list)-

II. Evaluation The snubbers in question are designed and installed for seismic considerations. That is, their design function is to accommodate pipe movement caused by slow thermal expansion, but to "lock-up" to prevent potentially damaging transient movement duri ng a postulated seismic event of sufficie'nt magnitude. The Pacific Scientific (PSA) mechanical snubbers which we propose to use operate on an "acceleration limiting" basis. PSA snubbers permit thermal movement since the acceleration .

associated with thermal movement is very low, but they limit seismic induced acceleration to 0.02g.. Mechanical snubbers would actually allow less movement than hydraulic snubbers under seismic conditions because

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of hydraulic snubber lockup delays associated with achieving- the lockup velocity, activation of the lockup mechanism, and compression of the hydraulic fluid. Therefore, based on seismic functional requirements, the planned replacement of hydraulic snubbers with mechanical snubbers would be an improvement.

Pacific Scientific performed extensive testing in developing the PSA 3 (3 kip) and PSA 10 mechanical sriubbers. The purpose was to evaluate their operability under the adverse conditions expected in many applications, such as high humidity, high temperature, and vibration.

The snubbers operated favorably under all test conditions.

PSA 3 and PSA 10 mechanical snubbers are currently in use at St. Lucie (see Amendment 31 to Facility Operating License DPR-67) and at a large number of other reactor sites. The use of these snubbers has been previously evaluated by the Commission and found to be acceptable.

III. Conclusions Based on testing and operating experience, the use of PSA mechanical snubbers should improve the operability of the seismic support system.

In conclusion, (1) the proposed change does not increase the probability or consequences of accidents or malfunctions of equipment important to safety and does not reduce the margi n of safety as defined in the basis for any technical specification, therefore, the change does not involve a significant hazards consideration, (2) there is reasonable assurance that the health and safety of the public will not be endangered by

operation in the proposed manner, and (3) such activities will be conducted in compliance with the Commission's regulations and the-issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.

~

r ~

Snubber Chan eout PSL The folios(ing hydraulic snubbers are scheduled to be replaced by mechanical snubbers during the Spring 1980 refueling outage:

V 3 Kip Size 10 Kip Size Tag No. Hark No. Tag No. Hark No.

035 HS-1076-3164 101 CC-17-1 061 HS-549-11 (S I-970-1248) 103 CC-21-5 066 HS-549-11(S I-970-.1248) 104 CC-21-1 073 . SI-972-6240 105 CC-23-2 074 SI-973-240 076 SI-973-6224 077 SI-868-64 079 SI-868-163 080 SI-868-410 086 SI-676-129 087 SI-676-241(SI-676-250) 088 CC-1899-48 089 CC-1852-6241 090 SPS-27 091 SPS-417 092 SPS-467 093 SPS-777 096 CC-1865-9 106 CH-3-40 107 CH-3-75 110 SI-676-247(SI-676-2475) 111 S I-676-247 5A 114 SI>>972-6240

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