ML17305B574

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Proposed Tech Spec Surveillance Requirement 4.7.9 Re Alternate Schedule for Snubber Visual Insp
ML17305B574
Person / Time
Site: Palo Verde  Arizona Public Service icon.png
Issue date: 05/28/1991
From:
ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:
Shared Package
ML17305B573 List:
References
NUDOCS 9106050323
Download: ML17305B574 (39)
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t 161-03973-WFC/DAF May 28, 1991 ENCLOSURE TECHNICAL SPECIFICATIONS PROPOSED CHANGES A. DESCRIPTION OF AMENDMENT RE UEST The amendment request proposes to revise Technical Specification Surveillance Requirement 4.7.9 to adopt an alternate schedule for snubber visual inspection which will take into account the size of the snubber

"'opulations. The current schedule for snubber visual inspections in Surve'illance Requirement 4.7.9b is being deleted and replaced by Table 4.7-2, Snubber Visual Inspection Interval. This request was patterned after, and conforms to, the guidance provided by the NRC in Generic Letter (GL) 90-09. It sh'ould be noted, however; that'he GL's suggested text in Surveillance Requirement 4'.7.9c regarding snubbers found connected to an inoperable common hydraulic fluid reservoir is not relevant to incorporate as PVNGS snubbers do not utilize common fluid reservoirs.

B. PURPOSE OF THE TECHNICAL SPECIFICATION All snubbers are required to be 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 the Technical Specification inspection program are those installed on non safety-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.

C. NEED FOR THE TECHNICAL SPECIFICATION AMENDMENT The current schedule for snubber visual inspections is based only on the number of inoperable snubbers found during the previous visual inspection and does not take into account the size of the snubber population. At PVNGS, the large number of snubbers results in a visual inspection schedule that is excessively restrictive. Therefore, APS seeks to implement the alternate schedule of GL 90-09 as this line-item Technical Specification improvement will reduce future occupational radiation exposure and is highly cost effective. In addition, the implementation of the alternative inspection schedule proposed in GL 90-09 will allow for less frequent snubber inspections if the results of the current inspections are favorable. This alternative schedule for visual inspections maintains the same level of confidence as the existing schedule for the identification of inoperable snubbers and is consistent with the NRC policy statement on Technical Specification improvements.

5'l06050323 9'l0528 PDR ADOCK 05000528 P POR

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0161-03973-NFC/DAF Hay 28, 1991 BASIS FOR NO SIGNIFICANT HAZARDS CONSIDERATION DETERMINATION The Commission has provided standards for determining whether a significant hazards consideration exists as stated in 10 CFR 50.92.

A proposed amendment to an operating license for a facility involves a no significant hazards consideration if operation of the facility in accordance with a proposed amendment would not: (1) Involve a significant ,increase in the probability or consequences of an accident previously evaluated; or (2) Create the possibility of a new or different kind of accident from any accident previously evaluated; or (3) Involve a significant reduction in a margin of safety.

A discussion of these standards as they relate to the amendment request follows:

Standard 1 -- Involve a significant increase in the probability or consequences of an accident previously evaluated.

The alternative visual inspection schedule was determined in GL 90-09 to maintain the same level of confidence in the snubbers ability to operate within a specified acceptance level as the existing visual inspection schedule. In addition, the action statements for inoperable snubbers remain unchanged. The alternative schedule determines the next visual inspection based upon snubber populations, rather than just the number of inoperable snubbers. As such, adopting this alternative schedule does not involve a significant increase in the probability or consequences of an accident previously evaluated.

Standard 2 -- Create the possibility of a new or different kind of accident from any accident previously evaluated.

The snubbers ensure that the structural integrity of the reactor coolant system and other safety-related systems is maintained during and following a seismic or other event initiating dynamic loads and thus are not credible as an accident initiator. In addition, adopting the alternative visual inspection schedule provided in GL 90-09 will not affect the capability of the PVNGS snubbers to perform their intended function during normal or accident conditions. Therefore, the proposed amendments do not create the possibility of a -new or different kind of accident from any accident previously evaluated.

Standard 3 -- Involve a significant reduction in a margin of safety.

As stated in GL 90-09, the alternative schedule for visual inspections maintains the same level of confidence in the snubbers ability to operate within a specified acceptance level as the existing schedule. In addition, the proposed amendments do not change any of the actions required to be taken as a result of inoperable snubbers and do not involve a change to safety limits, setpoints, or design margins. Therefore, the proposed amendments do not involve a reduction in a margin of safety at PVNGS.

t 161-03973-t6'C/DAF May 28, 1991 SAFETY ANALYSIS OF THE PROPOSED CHANGE In GL 90-09, the NRC has identified that the existing Technical Specifications specify a snubber visual inspection schedule that is based on the number of inoperable snubbers found during the previous visual inspection and does not take into consideration the size of the snubber population. This present schedule results in unnecessary occupational radiological exposure and demands a significant amount of resources to comply with. The alternative schedule proposed within GL 90-09 maintains the same level of confidence in assuring snubber operability as the current schedule and will generally allow visual inspections to be performed during plant outages. The action statement in this specification, required in the event of identification of inoperable snubbers, is not affected by this amendment request. Therefore, the proposed amendments do not involve a significant increase in the probability or consequences of an accident previously evaluated. In addition, replacing the current visual inspection schedule with the alternative visual inspection schedule provided in GL 90-09 will not affect the capability of PVNGS snubbers to perform their intended function during normal or accident conditions. As such, the proposed amendments do not create the possibility of a new or different kind of accident from any accident previously evaluated. Finally, this amendment request does not propose a change to safety limits, setpoints, or design margins. By proper snubber grouping and a statistical sampling program, the same confidence level can be maintained in ensuring the operability of snubbers. Therefore, the proposed amendments do not involve a significant reduction in a margin of safety at PVNGS.

F. ENVIRONMENTAL IMPACT CONSIDERATION DETERMINATION APS has determined that the proposed amendments involve no change in the amount or type of any effluent that may be released offsite and that there is no increase in individual or cumulative occupational radiation exposure.

As such, operation of PVNGS Units 1, 2, and 3, in accordance with the proposed amendments, does not involve an unreviewed environmental question.

G. MARKED-UP TECHNICAL SPECIFICATION CHANGE PAGES See attached pages XXII, 3/4 7-21, 3/4 7-22, 3/4 7-25a, and 3/4 7-25b for Units 1, 2, and 3, respectively.

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INDEX LIST OF TABLES PAGE 3.7 2 MAXIMUM ALLOWABLE STEADY STATE POWER LEVEL AND MAXIMUM VARIABLE OVERPOWER TRIP SETPOINT WITH INOPERABLE STEAM

'INE SAFETY VALVES.... 3/4 7-3

'4. 7-1 SECONDARY COOLANT SYSTEM SPECIFIC ACTIVITY PROGRAM.............,...............

0 7-2

4. 8" 1 SAMPLE AND ANALYSIS SNuHBEP, VJSuNl Xhf5F'ECVuhl XMTERV/I "

DIESEL GENERATOR TEST SCHEDULE......,...................

~ ~ .. ~ ~ ~ ~ " ~

3/4 7-8 DW V-Z.SX

,3/4 8" 7

3. 8-1 0. C. ELECTRICAL SOURCES................................. 3/4 8-11
4. 8-2 BATTERY SURVEILLANCE REQUIREMENTS....................... 3/4 8-12 3.8-2 COHTAINMEHT PENETRATION CONDUCTOR OVERCURREHT PROTECTIVE DEVICES.......................,...,...,...... 3/4 8-19
3. 8-3 MOTOR-OPERATED VALVES THERMAL OVERLOAD PROTECTIOH ANO/OR BYPASS DEVICES....; .............,......,,........ 3/4 8-4'/4 4.11-1 RADIOACTIVE LI(UID WASTE SAMPLING AND ANALYSIS PROGRAM.. 11-2 4.11-2 RADIOACTIVE GASEOUS WASTE SAMPLIHG AHD ANALYSIS P RO G RAMe ~ ~ ~ ~ ~ i ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 0 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 4 ~ 3/4 11-8
3. 12-1 RADIOLOGICAL EHVIRONM HTAL MONITORING PROGRAM........... 3/4 12-3
3. 12-2 REPORTIHG LEVELS FOR RADIOACTIVITY COHCEHTRATIONS IN EHVIROHMENTAL SAMPLES................................ 3/4 12-7 4.12-1 DETECTIOH CAPABILITIES FOR ENVIROHMEHTAL SAMPLE ANALYSI Se ~ ~ ~ ~ ~ o ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ o ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3/4 12" 8 B 3/4.4-1 REACTOR VESSEL TOUGHNESS,...........................,... B 3/4 4-8
5. 7-1 COMPQHEHT CYCLIC OR TRANSIENT LIMITS..................... 5-7
5. 7" 2 PRESSURIZER SPRAY NOZZLE USAGE FACTOR.....,......'...,... 5-9 e.2-1 MINIMUM SHIFT CREW COMPOSITIOH....................,... e"5 I

PALO VERDE " UNIT 1 XXII AMEHDMEHT HQ. >4

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PLANT SYSTEMS 3/4.7.9 SNUBBERS LIMITING CONDITION FOR OPERATION 3;.7. 9 Al 1 hydraul.ic .End::mechanical-.snubbers'.'shal L be .OPERABLE. The only snubbers 'excluded from this requirement 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-rel ated system.

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 on any system, 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 4.7.9g. on the attached component or declare the attached system inoperable and follow the appropriate ACTION statement for ,

that system.

SURVEILLANCE RE UIREHENTS 4.7. 9 Each snubber shall'e demo'nstrated OPERABLE by performance of the following augmented inservice inspection program and the requirements of Specification 4.0.5.

a. Snubber T es As used in this specification, type of snubber shall mean snubbers of the same design and manufacturer, irrespective of capacity.
b. Visual Ins ections

<yes~ insert tI Snubbers are categorized as inac essible or accessib e during reactor operation. Each of these ~ups (inaccessible and a cessible) may be ins ected inde endentl accordin to the schedule below. h first inservice visual i spection of each t pe of snubber shal be peri rmed after 4 month but within 10 mon hs of commencing P WER OPE ATION and shall in ude all hydraulic and mechanical snu bers.

If all snubbers of ea type are found 0 ERABLE during visual the irst i spection i service visual ins ection, the second inservice f that type shall e performed at the first refueling age. o Otherwise, subsequ nt visual inspecti ns of a given typ shall be performed in acco dance with the fol owing schedule:

PALO VERDE - UNIT 1 3/4 7"21 AMENDMENT NO. 27

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t ONTROLLED BY USE%,

PLANT SYSTEMS

.SURVEILLANCE RE UIREMENTS (Continued)

o. of Inoperabl Snubbers of Each Ty e Subsequent V sual er Ins ection eriod Ins ection eriod"0 0 18 mon s + 25K 1 12 mo hs + 25X 6 nths k 25K 3,4 1 days 2 25K 5,6,7 2 days + 25K 8 or more 31 days + 25K
c. Visual Ins ection Acce tance Criteria Visual inspections shall verify that: (1) -there are no visible indica-tions of damage or impaired OPERABILITY and (2) attachments to the foundation or supporting structure are secure, and (3) fasteners for attachment of the snubber to the component and to the snubber anchorage Snubbers which appear inoperable as a result of visual insert Q are secure.

~%iiiii f i i the next visual inspection interval, provided that: (1) the cause of f i 'li ii g the rejection is clear ly established and remedied for that particular snubber and for other snubbers irrespective of type on that system that may be generically susceptible and (2) the affected snubber is functionally tested in the as-found condition and'etermined OPERABLE per Specifications 4.7.9f. Mhen a fluid port of a hydraulic snubber is found to be uncovered, the snubber shall be declared inoperable be determined OPERABLE via functional testing unless the test and'annot is started with the piston in the as-found setting, extending the piston rod in the tension mode directioh. Snubbers which appear inop-erable during an area post maintenance inspection, area walkdown, or Transient Event Inspection shall not be considered inoperable for the purpose of establishing the Subsequent Visual Inspection Period ',

provided that the cause of the inoperability is'learly established and remedied for that particular snubber and for the other snubbers, irrespective of type, that may be generally susceptible.

d. Transient Event Ins ection An inspection shall be performed of all hydraulic and mechanical snub-bers attached to sections of systems that have experienced unexpec-ted, potentially damaging transients as determined from a review of operational data. A visual inspection of the systems shall be made within 6 months following such an event. In addition to satisfying "The i spection interval r each type of sn ber on a given sys em shall not be 1 ngthened more than one step at a time nless a generic pr blem has been id tified and correct d; in that event t e inspection interv 1 may be 1 ngthened one step t e first time and t o steps thereafter f no inoperable nubbers of that ty are found on that system.

OThe rovisions of pecification 4.0.2 are not applicable PALO VERDE - UNIT 1 3/4 7"22 AMENDMENT NO. 27

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determined by Table 4.7-2. The visual inspection interval for each type of snubber shall be determined based upon the criteria provided in Table 4.7-2 and the first inspection interval determined using this criteria shall be based upon the previous inspection interval as established by the requirements in effect before amendment (*).

  • NRC will include the number of the license amendment that implements this change.

INSERT B:

shall be classified as unacceptable and may be reclassified acceptable

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pggW SNUBBE VISUAL INSPECTION INTERVAL NUMBER OF UNACCEPTABLE SNUBBERS Population Column A Column B Column C or Category Extend Interval Repeat Interval Reduce Interval Notes 1 a d Notes 3 and 6 Notes 4 and 6 Notes 5 and 6 80 100 150 200 13 300 400 18 36 500 12 24 48 750 20 40 78 1000 or greater 29 56 109 Note 1: The next visual inspection interval for a snubber population or category size shall be determined based upon the previous inspection interval and the number of unacceptable snubbers found during that interval. Snubbers may be categorized, based upon their accessibility during power operation, as accessible or inaccessible. These categories may be examined separately or jointly. However, the licensee must make and document that decision before any inspection and shall use that decision as the basis upon which to determine the next inspection interval for that category.

Note 2: Interpolation between population or category sizes and the number of unacceptable snubbers is permissible. Use next lower integer for the value of the limit for Columns A, B, or C if that integer includes a fractional value of unacceptable snubbers as determined by interpolation.

3/4 7-25a PALO VERDE-UNIT 1

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TABLE 4.7-2 Continued SNUBBER VISUAL INSPECTION INTERVAL Note 3: If the number of unacceptable snubbers is equal to or less than the number in Column A, the next inspection interva may be twice the previous interval, but not greater than 48 months.

Note 4: If the number of unacceptable snubbers is equal to or less number in Column B, but greater than the number in than the Column A, the next inspection interval shall be the same as the previous interval.

Note 5: If the number of unacceptable snubbers is equal to or greater than the number in Column C, the next inspection interval shall be two-thirds of the previous interval.

However, if the number of unacceptable snubbers is less than the number in Column C, but greater than the number in Column B, the next interval shall be reduced proportionally by interpolation, that is, the previous interval shall e reduced by a factor that is one-third of the ratio of the difference between the number of unacceptable snubbers found during the previous interval and the number in Column B to the difference in the numbers in Columns B and C.

Note 6: The provisions of Specification 4.0.2 are applicable for all inspection intervals up to and including 48 months.

3/4 7-25b PALO VERDE-UNIT

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INDEX LIST OF TABLES PAGE

3. 7-2 MAXIMUM ALLOWABLE STEADY STATE POWER LEVEL AND MAXIMUM VARIABLE OVERPOWER TRIP SETPOIHT WITH INOPERABLE STEAM LINE SAFETY VALVES..... 3/4 7-3
4. 7-1 SECONDARY COOLANT SYSTEM SPECIFIC ACTIVITY SAMPLE AND ANALYSIS PROGRAM. 3/4 7-8 Qy p SN!IBSEN VISVWL IhfS Pec "rlolV Z'N TER Yfjl Wy Z-2.Sa
4. 8-1 DIESEL GENERATOR TEST SCHEDULE....................... .. ~ 3/4 8-7
3. 8" 1 D.C. ELECTRICAL SOURCES 3/4 8"11
4. 8-2 BATTERY SURVEILLANCE RE(UIREMEHTS 3/4 8-12
3. 8" 2 CONTAINMENT PENETRATIOH CONDUCTOR OVERCURREHT PROTECTIVE DEVICES.... 3/4 8-19
3. 8-3 MOTOR-OPERATED VALVES THERMAL OVERLOAD PROTECTION AND/OR BYPASS DEVICES................................... 3/4 8" 41
4. 11-1 RADIOACTIVE LIQUID WASTE SAMPLING AND ANALYSIS PROGRAM.. 3/4 11-2 4
4. 11-2 RADIOACTIVE GASEOUS WASTE SAMPLING AND ANALYSIS PROGRAM. ~ \ ~~1 \ ~ ~~~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3/4 11-8
3. 12-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM..... -..... 3/4 12-3
3. 12-2 REPORTIHG LEVELS FOR RADIOACTIVITY COHCEHTRATIOHS IH EHVIROHMENTAL SAMPLES. 3/4 12-7 4.12-1 DETECTION CAPABILITIES FOR ENVIRONMENTAL SAMPLE ANALYSIS ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3/4 12-8 B 3/4.4-1 REACTOR VESSEL TOUGHNESS....... B 3/4 4-8
5. 7-1 COMPONENT CYCLIC OR TRANSIENT LIMITS.................
5. 7-2 PRESSURIZER SPRAY HOZZI E USAGE FACTOR................... 5" 9
6. 2-1 MIHIMUM SHIFT CREW COMPOSITIOH.........

PALO VERDE - UNIT 2 XXII AMEN

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YRGLILEB BV VAIR PLANT SYSTEMS 3/4.7..9 SNUBBERS LIMITING CONDITION FOR OPERATION 3.7.9 All hydraulic and mechanical snubbers shall be OPERABLE. 'The only snubbers excluded from this requirement 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-r el ated system.

APPLICABILITY: MODES 1, 2, 3, and 4. MODES 5 and 6 for snubbers Tocated on sys tems requi r ed OPERABLE in,those MODES.

ACTION With one or more snubbers inoperable on any system, 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. 9g. on the attached component or declare the attached system inoperable and-follow the appropriate ACTION statement for that system.

SURVEILLANCE REOUIRENENTS 4.7.9 Each snubber shall be demonstrated OPERABLE by performance of the following augmented i nservice inspection program and the requirements of Speci-ication 4.O.5.

a. Snubber T oes As usea in this specification, type of snubber shall mean snubbers of the same design and manufacturer, irrespective of capacity.
b. Visual :nsoections ~ L A

<ypes Snubbers are categorized as inac essible or accessib e during reactor operation. Each of these greups (inaccessible and a cessible) may be inspected inde endently according to the schedule elow. e erst nserv>ce vssua sns ec son o eac typ o snubber shall e perfo med after 4 months ut within 10 month of commencing POW OPE TION and shall inc de all hydraulic d mechanical snubb rs.

If 11 snubbers of eac type are found OP ABLE during the fi st ervice visual insp ction, the second i service visual ins ection that type siiall b performed at.the f rst refueling outa e. be-therwise, subseque t visual .inspectio s of a given type s all performed in accor ance with the foll ing schedule:

PALO VERDE-

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C NTROLLED BY ER PLANT SY5TENS SURVEILLANCE REOUIREt1ENTS (Continued)

o. of Inoperable Sn bers of Each Type Subsequent Visua er Ins ection Peri Inspection Peri d*¹ 0 18 months + 5X 1 12 months 25K 2 6 months + 25K 3,4 124 da + 25K 62 d ys + 25%

8 or more 31 ays 2 25K

c. Visual Inspection Acce tance Criteria

'Visual inspections shall verify that: (1)'here are no visible indica-tions o'i carnage or impai red OPERABILITY and (2) attachments to the foundation or supporting structure are secure, and (3) fasteners for attachment of the snubber to the component and to the snubber anchorage are secure. Snubbers which appear inoperable as a result of visual Nserk g for the purpose of establishing the next visual inspection interval, provided that: (1) the cause of the rejec:ion is clearly established and remedied for that particular snubber'na for other snubbers irrespective of type on that system that may pe generical'iy susceptible; and (2) the affected snubber is functionally tested in the as-found condition and determined OPERABLE per Speci;ications 4.7.9f. When a fluid port of a hydraulic snubber is found to be uncovered, the snubber shall be declared inoperable and cannot be 'etermined OPERABLE via functional testing unless the test is startea with the piston in the as-found setting, extending the piston roa in the tension mode direction. Snubbers which appear in- ,

operable curing an area post maintenance inspection, area walkdown, or Transient Event Inspection shall not be considered inoperable for the purpose of establishing the Subsequent Visual Inspection Period provided that the cause of the inoperability is clearly established and remeaied for that particular snubber and for the other snubbers, irrespective of type, that may be generally susceptible.

d. Transient =vent Inspection An inspection shall be 'performed of all hydraulic and mechanical snubbers attached to sections of systems that have experienced unexpect-ed, potentially damaging transients as determined from a review of operational data. A visual inspection of the systems shall be made within 6 months following such an event. In addition to satisfying ll The i'nsp tion interval for ch type of snubber n a given system s ll not be leng ened more than one step at a time unle s a generic problem as been identi ied and corrected; 'n that event the in pection interval m be leng ened one step the f rst time and two s ps thereafter if n inoperable snu ers of that type a found on that sys m.

¹T provisions of Soe fication 4. 0.2 are ot a licable.

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PALO VERDE " 7

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determined by Table 4.7-2. The visual inspection interval for each type of snubber shall be determined based upon the criteria provided in Table 4.7-2 and the first inspection interval determined using this criteria shall be based upon the previous inspection interval as established by the requirements in effect before amendment (*). 4

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  • NRC vill include the number of the license amendment that implements this change.

~?NSE T B:

shall be classified as unacceptable and may be reclassified acceptable

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SNUBBER VISUAI INSPECT ON INTERVAL NUMBER OF UNACCEPTABLE SNUBBERS Population Column A Column B Column C or Category Extend Interval Repeat Interval Reduce Interval Notes 1 and Notes 3 and 6 Notes 4 and 6 Notes 5 and 6 80 100 150 200 13 300 12 25 400 36 500 12 24 750 20 40 78 1000 or greater 29 56 109 Note 1: The next visual inspection interval for a snubber population or category size shall be determined based upon the previous inspection interval and the number of unacceptable snubbers found during that interval. Snubbers may be categorized, based upon their accessibility during power operation, as accessible or inaccessible. These categories may be examined separately or jointly. However, the licensee must make and document that decision before any inspection and shall use that decision as the basis upon which to 'determine the next inspection interval for that category.

Note 2: Interpolation between population or category sizes and the number of unacceptable snubbers is permissible. Use next lower integer for the value of the limit for Columns A, B, or C if that integer includes a fractional value of unacceptable snubbers 's determined by interpolation.

3/4 7-25a PALO VERDE-UNIT 2

414 TABLE 4.7-2 Continued SNUBBER VISUAL INSPECTION INTERVAL Note 3: If the number of unacceptable snubbers is equal to or less than the number in'olumn A, the next inspection interval may be twice the previous interval, but not greater than 48 months.

Note 4: If the number of unacceptable snubbers is equal to or less than the number in Column B, but greater than the number in Column A, the next inspection interval shall be the same as the previous interval.

Note 5: If the number of unacceptable snubbers is equal to or greater than the number in Column C, the next inspection interval shall be two- thirds of the previous interval.

However, if the number of unacceptable snubbers is less than the number in Column', but greater than the number in Column B, the next interval shall be reduced proportionally by interpolation, that is, the previous interval shall be reduced by a factor that is one-third of the ratio of the difference between the number of unacceptable snubbers found during the previous interval and the number in Column B 'to the difference in the numbers in Columns B and CD Note 6: The provisions of Specification 4.0.2 are applicable for all inspection intervals up to and including 48 months.

3/4 7-25b PALO VERDE-UNIT 2

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CONTROLLED BY USES INDEX LIST OF TABLES PAGE 3.7-2 MAXIMUM ALLOWABLE STEADY STATE POWER LEVEL AND MAXIMUM VARIABLE OVERPOWER TRIP SETPOINT WITH INOPERABLE STEAM LINE SAFETY VALVES...................................... 3/4 7-3

4. 7-1 SECONDARY COOLANT SYSTEM SPECIFIC ACTIVITY SAMPLE AND ANALYSIS PROGRAM.................. 3/4 7-8 0.'t-2 ~'NUBBER V ISURL XhfSI'ECT/ON 2'Af ERAL ~/e v-isa
4. 8-1 DIESEL GENERATOR TEST SCHEDULE.......................... 3/4 8-7
3. 8-1 D. C. ELECTRICAL SOURCES................................. 3/4 8"11
4. 8-2 BATTERY SURVEILLANCE REQUIREMENTS....................... 3/4 8-12
3. 8-2 CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES...................................... 3/4 8-'19
3. 8-3 MOTOR-OPERATED VALVES THERMAL OVERLOAD PROTECTION AND/OR BYPASS DEVICES............................... 3/4 8-41 4.11-1 RADIOACTIVE LIQUID WASTE SAMPLING AND ANALYSIS PROGRAM.. 3/4 u.-2 4.11-2 RADIOACTIVE GASEOUS WASTE SAMPLING AND ANALYSIS P ROGRAM.......... ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3/4 11-8
3. 12-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM........... 3/4 12-3 3.12 2 REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES..; ......... 3/4 12-7 4.12-1 DETECTION CAPABILITIES FOR ENVIRONMENTAL SAMPLE ANALYSIS ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3/4 12-8 B 3/4.4-1 REACTOR VESSEL TOUGHNESS.......................... B 3/4 4-8
5. 7-1 COMPONENT CYCLIC OR TRANSIENT LIMITS..................... 5-7
5. 7-2 PRESSURIZER SPRAY NOZZLE USAGE FACTOR.. 5-9
6. 2-1 MINIMUM SHIFT CREW COMPOSITION.......

PALO VERDE " UNIT 3 XXII

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CONTROLLED BV USER PLANT SYSTEMS 3/4. 7. 9 SNUBBERS:

LIMITING CONDITION FOR OPERATION 3.7.9 All hydraulic and mechanical snubbers shall be OPERABLE- The only snubbers excluded from .his requirement are those install.ed 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.

APPLICABILITY: MODES 1, 2, 3, and 4. MODES 5 and 6 for snubbers located on systems required OPERABLE in those MODES.

ACTION:

..Mith one or more snubbers inoperable on any system, 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 4.7.9g. on the attached component or declare the attached system inoperable and follow the appropriate ACTION statement for that system.

SURVEILLANCE RE UIREMEHTS

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

~Sb T As used in this specification, type of snubber shall mean snubbers of the same design and. manufacturer, irrespective of capacity.

b. Visual Ins ections inset-b P 9 y pcs Snubbers are categorized as inac essible or accessib e during reactor operation. Each of these ~ups (inaccessible and a cessible ma be inspected independently according to the schedule below. he sr 1nservsce vlsua inspection o eac ype o snubber sh ll be p formed after 4 mon hs but within 10 m nths of commencin POMER ERATIOH and shall nclude all hydraul c and mechanical s ubbers."

f all snubbers of ach type are found OPERABLE during t first inservice visual. i spection, the seco d inservice visual inspection of that type shal be performed at e first refueling utage.

Otherwise, subse uent visual inspe ions of a given ty e shall be erformed in ac ordance with the f llowin schedule:

"With the exception that the first inservice visual inspection for all snubbers that are inaccessible during reactor operation shall be conducted no later than the first refueling outage.

PALO VERDE " UNIT 3 3/4 7-2Z AMEHDMEHT NO. '0

NTROLLED BY USER PLAHT SYSTEMS SURVEILLAHCE RE UIREHEHTS (Continued)

H . of Inoperable Snu bers of Each Type Subsequent Vis al er Ins ection Perio Ins ection P iod"¹ 0 18 months + 25K 1 12 month ~ 25~

2 6 mont s 2 25K 3,4 124 d ys ~ 25K 5,6, 62 ays + 25K 8 o more 3 days + 25K

c. Visual Ins ection Acce tance Criteria Visual inspections shall verify that: (1) there are no visible indica-tions of damage or impaired OPERABILITY and (2) attachments to the foundation or supporting structure are secure, and (3) fasteners for attachment of the snubber to the component and to the snubber anchorage are secure. Snubbers which appear inoperable'as a result of visual insert Q PIRIB4t f p f Ill the next visual inspection interval, provided that: (1) the cause of the rejection is clearly established and remedied for that particular snubber and for other snubbers irrespective of type on that system

. that may be generically susceptible; and (2) the affected snubber is functionally tested in the as-found condition and determined OPERABLE per Specifications 4.7.9f. Mhen a fluid port of a hydraulic snubber is found to be uncovered, the snubbe~ shall be declared inoperable and cannot be determined OPERABLE via functional testing unless the test is started with the piston in the as-found setting, extending the piston rod in the tension mode direction. Snubbers which appear in-operable during an area post maintenance inspection, area walkdown, or Transient Event Inspection shall not be considered inoperable for the purpose of establishing the Subsequent Visual Inspection Period provided that the cause of the inoperability is clearly established and remedied for that. particular snubber and for the other snubbers, irrespective of type, that may be generally susceptible.

d. Transient, Event Ins ection An inspection shall be performed of all hydraulic and mechanical snubbers attached to sections of systems that have experienced unexpected, potentially damaging transients as determined from a review of operational data. A visual inspection of the 'systems shall be made within 6 months following such an event. In addition "The inspect on interval for e ch type of snubber on a given system shall not'e lengthe ed more than one tep at a time unl s a generic probl m has been identifie and corrected; i that event the i pection interval ay be lengthe d one step the fi st. time and two s ps thereafter if o inoperable snubber of that type are found on that sys m.

h'The p ovisions of Specif cation 4.0.2 are ot applicable.

PALO VEROE - UHIT 3 3/4 7-22

I

'\

1

'lt I

INSERTED TEX INSERT A:

determined by Table 4.,7-2. The visual inspection interval for each type of snubber shall be determined based upon the criteria provided in Table 4.7-2 and the first inspection interval determined using this criteria shall be based upon the previous inspection interval as established by the requirements in effect before amendment, (*}.

  • NRC will include the number of the license amendment that implements this change.

INSERT classified reclassified acceptable B'hall be as unacceptable and may be

1 SNUBBER VISUAL INSPECTION INTERVAL NUHBER OF UNACCEPTABLE SNUBBERS Population Column A Column B Column C or Category Extend Interval Repeat Interval Reduce Interval Notes 1 and 2 Notes 3 and 6 Notes 4 and 6 Notes 5 and 6 80 0 100 4 150 200 13 300 12 400 18 36 500 12 24 48 750 20 40 78 1000 or greater 29 56 109 Note 1: The next visual inspection interval for a snubber population or category size shall be determined based upon the previous inspection interval and the number of unacceptable snubbers found during that interval. Snubbers may be categorized, based upon their accessibility during power operation, as accessible or inaccessible. These categories may be examined separately or jointly. However, the licensee must make and document that decision before any inspection and shall use that decision as the basis upon which to determine the next inspection interval for that category.

Note 2: Interpolation between population or category sizes and the number of unacceptable snubbers is permissible. Use next lower integer for the value of the limit for Columns A, B, or C if that integer includes a fractional value of unacceptable snubbers as determined by interpolation.

3/4 7-25a PALO VERDE-UNIT 3

TABLE 4.7-2 Continued SNUBBER VISUAL INSPECTION INTERVAL Note 3: If the number of unacceptable snubbers is equal to or less than the number in Column A, the next inspection interval may be twice the previous interval, but not greater than 48 months.

Note 4: If the number of unacceptable snubbers is equal to or less than the number in Column B, but greater than the number in Column A, the next inspection interval shall be the same as the previous interval.

Note 5: If the number of unacceptable snubbers is equal to or greater than the number in Column C, the next inspection interval shall be two-thirds of the previous interval.

However, if the number>> of unacceptable snubbers is less than the number in Column C, but greater than the number in Column B, the next interval shall be reduced proportionally by interpolation, that is, the previous interval shall be reduced by a factor that is one-third of the ratio of the difference between the number of unacceptable snubbers found during the previous interval and the number in Column B to the difference in the numbers in Columns B and C.

Note 6: The provisions of Specification 4.0.2 are applicable for all inspection intervals up to and including 48 months.

3/4 7-25b PALO VERDE-UNIT 3

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