ML17340B239
| ML17340B239 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 05/14/1981 |
| From: | FLORIDA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML17340B237 | List: |
| References | |
| NUDOCS 8105220247 | |
| Download: ML17340B239 (13) | |
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3.13 SHOCK SUPPRESSORS SNUBBERS LIMITING CONDITION FOR OPERATION 3-13 All snubbers listed in Tables 3.13-1a and 3.13-lb shall be OPERABLE.
'APPLICABILITY: All modes of operation except Cold Shutdown and Ref ueling Shutdown.
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 or declare the supported system inoperable and follow the appropriate ACTION statement for that system-4 5/14/81
TABLE 3.13-1a SHEET 1
SAFETY RELATED HYDRAULIC SNUBBERS* UNIT 3 FPL Tag No.
System Approximate Elevation feet Snubbers in High Radiation Areas Duri Shutdown**
Snubbers Especially Difficult to Remove Inaccessible Accesible During Normal During Normal 0 eration eration NONE Snubbers may be added to or removed from safety related systems without prior License Amendment to Table 3.13-1a provided a revision to Table 3.13-la is included w'ith the next License Amendment request.
- Modifications to this column due to changes in high radiation areas may be made without prior License Amendment provided that a revision to Table 3.13-la is included with the next License Amendment request.
5/14/81
TABLE 3.13-lb SHEET 1
SAFETY RELATED MECHANICAL SNUBBERS* UNIT 3 FPL Tag No.
10 Sys tern Charging Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Approximate Elevation 14 14 14 14 14 14 14 14 14 14 14 Snubbers in High Snubbers Especially Radiation Areas Difficult to Duri Shutdown**
Remove X
Inaccessible During Normal 0 eration, X
X X
X Acces ible During Normal 0 eration 12 13 14 15 16 17 18 19 20 21 22 23 Pressurizer Pressurizer Spray Spray Pressurizer Relief Pressurizer Relief Pressurizer Relief Pressurizer Relief Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray 14 14 74 1/2 74 1/2 74 1/2 73 73 73 73 73 73 73 X
X X
X 5/14/81
TABLE 3.13-1b SHEET 2
SAFETY RELATED MECHANICAL SNUBBERS+ - UNIT 3 FPL Tag No.
Sys tern Approximate Snubbers in High Snubb'ers Especially Inaccessible Accesible Elevation Radiation Areas Difficult to During Normal During Normal feet Duri Shutdown**
Remove 0 eration 0 eration 24 25 26 27 28 29 30 31 38 39 40
= 41 42 43 44 45 46 47 48 49 50 51 Pressurizer Relief Pressurizer Relief Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Relief Pressurizer Relief Residual Heat Removal Residual Heat Removal Residual Heat Removal Residual Heat Removal Saf ety Injection Residual Healt Removal Safety Injection Safety Injection Steam to Aux. Feedwater Steam to Aux. Feedwater Steam to Aux-Feedwater Steam to Aux.
Feedwater Main Steam Main Steam 73 73 73 73 73 73 73 73 12 12 12 12 26 26 26 30 1/2 32 32 X
X X
X X
5/14/81
TABLE 3.13-1b SHEET 3 SAFETY RELATED MECHANICAL SNUBBERS* UNIT 3 PPL Tag No.
60 61 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 System Main Steam Main Steam Main Steam Main Steam Main Steam Main Steam Peedwater Peedwater Peedwater Feedwater Peedwater Peedwater Peedwater Peedwater Peedwater Peedwater Peedwater Peedwater Peedwater Approximate Elevation feet 32 32 32 32 32 32 58 58 56 52 55 55 56 58 56 58 55 Snubbers in High Snubbers Especially Radiation Areas Difficult to Duri Shutdown**
Remove Inaccessible During Normal eration X
Accesible During Normal eration 92 93 Reactor Coolant System Reactor Coolant System 25 27 X
5/14/81
TABLE 3.13-1b SHEET 4 SAFETY RELATED MECHANICAL SNUBBERS* UNIT 4 FPL Tag No.
Sys tern Feedwa ter Feedwater Pressurizer Spray Pressurizer Spray Approximate Elevation feet 30 30 14 Snubbers in High Snubbers Especially Radiation Areas Difficult to Duri Shutdown**
Remove Inaccessible During Normal eration X
Accesible During Normal eration 10 Pressurizer Pressurizer Spray Spray 14 14 12 Pressurizer Spray 14 13 14 Pressurizer Pressurizer Spray Spray 14 14 X
16 17 18 19 20 21 22 23 24 25 26 27 Pressurizer Spray Pressurizer Spray Charging Feedwater Feedwater Feedwater Feedwater Feedwater Feedwater Pressurizer Relief Pressurizer Relief Pressurizer Relief Pressurizer Relief 14 14 14 58 58 58 58 58 58 73 73 73 73 X
X X
5/14/81
TABLE 3.13-1b SHEET 5 SAFETY RELATED MECHANICAL SNUBBERS* UNIT 4 FPL Tag No=
28 29 30 31 32 34 35 36 37 38 39 40 41 42 43 44 46 47 48 49 50 System Pressurizer Relief Pressurizer Spray Pressurizer Spray Pressurizer Relief Pressurizer Relief Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Relief Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Pressurizer Spray Residual Heat Removal Residual Heat Removal Approximate Elevation feet 73 73 73 73 73 73 73 73 73 73 73 73 73 73 14 14 14 14 14 14 Snubbers in High Snubbers Especially Radiation Areas Difficult to Duri Shutdown**
Remove X
X X
Inaccessible During Normal eration X
X X
Accesible During Normal eration 5/14/81
TABLE 3.13-lb SHEET 6
SAFETY RELATED MECHANICAL SNUBBERS* UNIT 4 FPL Tag No.
51 52 53 54 55 57 58 59 60 80 81 82 83 84 85 86 Sys tern Residual Heat Removal Residual Heat Removal Residual Heat Removal Safety Injection Safety Injection Main Steam Main Steam Main Steam Main Steam Feedwater Feedwater Feedwater Main Steam Main Steam Main Steam Main Steam Approximate Snubbers in High Snubbers Especially Inaccessible Elevation Radiation Areas Difficult to During Normal (feet)
Durin Shutdown**
Remove 0 eration 12 12 32 32 32 32 56 56 56 32 32 32 32 Accesible During Normal 0 eration X
X X
Snubbers may be added to or removed from safety related systems without prior License Amendment to Table 3.13-1b provided a revision to Table 3.13-1b is included with the next License Amendment request.
- Modifications to this column due to changes in high radiation areas may be made without prior License Amendment provided that a revision to Table 3.13-lb is included with the next License Amendment request.
5/14/81
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l 4.14 SHOCK SUPPRESSORS (SNUBBERS)
A plicabililit :
Applies to periodic surveillance of safety-related shock suppressors (snubbers).
Obg ective:
To verify operability of safety-related shock suppressors listed in Table 3.13-la and 3.13-lb by performance of the following augmented inservice inspection program.
S ecification:
1.
Visual Inspections The first 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 3.13-1a and 3.13-1b.
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 + 25% from the date of the first inspection.
Otherwise, subsequent visual inspections shall be performed in accordance with the following schedule:
No. Inoperable Snubbers er Inspection Period 0
1 2
3,4 5,6,7 8 or more Subsequent Visual Ins ection Period*
18 months, + 25%
12 months. + 25%
6 months + 25%
124 days + 25%
62 days + 25%
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31 days + 25%
4 Those snubbers may be categorized into two groups:
Those accessible and.those inaccessible during reactor operation.
Each group may be inspected independently in accordance with the above schedule.
2.
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.
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/or (2) the affected snubber is functionally tested in the as found condition and~ determined OPERABLE per Specifications 4.13.4 or 4.13.5, as applicable.
The inspection interval shall not be lengthened more than one step at a time unless a generic problem has been identified and corrected; in that event the inspection may be lengthened one step the first time and two steps thereafter if no inoperable snubbers are found.
4.14-1 5/14/81
3.
Functional Tests At least once per 18 months during shutdown, a representative sample**
(10% of the.snubbers listed in Tables 3.13.1a and 3.13.1b) shall be functionally tested either in place or in a bench test.
For each snubber that does not meet the functional test acceptance criteria of Specification 4.13.4 or 4.13.5, an additional 10% of that type of snubber shall be functionally tested.
Functional testing shall continue until no additional snubbers are found inoperable or all snubbers listed in Tables 3.13.la and 3.13.lb.
Snubbers identified in Tables 3.13-1a and 3..13-lb as "Especially Difficult to Remove" or in "High Exposure Zones During Shutdown" shall also be included in the representative sample.*
Tables 3.13-la and 3.13-1b may be used jointly or separately as the basis for the sampling plan.
In addition to the regul'ar 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 shall not result in additional functional testing due to failure.
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 for further action or testing.
4.
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.
- The requirements of this section for functionally testing mechanical snubbers may be waived until startup following the seventh refueling outages for Units 3 and 4.
- 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 the completion of their fabrication or at a subsequent date.
4.14-2 5/l4/8l
5.
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.
2.
Activation (restraining action) is achieved in both tension and compression.
4.14-3
B3.13 BASES LIMTING CONDITIONS FOR OPERATION 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 intitiating 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'ave 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 perf ormed before the original required time interval has elapsed (nominal time less 25K) 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 refection 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 exerted 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 re1ated to rejection of the snubber by visual inspection, or are similarly located or exposed to the same environmental'onditions such as temperature, radiation, and vibration.
When a snubber is found inoperable, an 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 adversly 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 month intervals.
Observed failure of these sample snubbers shall require functional testing of additional units.
II In cases where the cause of failure has been identif.ied, additional
- snubbers, having a high probability for the same type failure or that are being used in the same application that caused the failure, shall be tested.
This requirement increases the probability of locating inoperable snubbers without testing 100K of the snubbers.
B3 ~ 1 3-1 5/14/81
Hydraulic snubbers and mechanical snubbers may each be treated as a
different entity for the above surveillance programs.
B3.1 3-2 5/14/81