ML17058A732
| ML17058A732 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 05/06/1991 |
| From: | Capra R Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17058A733 | List: |
| References | |
| GL-90-09, GL-90-9, NUDOCS 9105130124 | |
| Download: ML17058A732 (22) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555 NIAGARA MOHAWK POIJER CORPORATION DOCKET NO. 50-410 NINE MILE POINT NUCLEAR STATION~ UNIT 2 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No.29 License No. NPF-69 1.
The Nuclear Regulatory Commission (the Commission) has found that:
A.
The application for amendment by Niagara Mohawk Power Corporation (the licensee) dated February 20, 1991, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act) and the Commission's rules and regulations set forth in 10 CFR Chapter 1;
B.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.
There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.
The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.
2.
Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment, and paragraph 2.C.(2) of Facility Operating License No.
NPF-69 is hereby amended to read as follows:
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Technical Specifications and Environmental Protection Plan The Technical Specifications contained in Appendix A and the Environmental Protection Plan contained in Appendix 8, both of which are attached
- hereto, as revised through Amendment No. 29 are hereby incorporated into this license.
Niagara Mohawk Power Cor'poration shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.
3.
This license amendment is effective as of the date of its issuance to be implemented. within 30 days.
FOR THE NUCLEAR REGULATORY COMMISSION
Attachment:
Changes to the Technical Specifications
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Robert A. Capra, Director Project Directorate I-l Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Date of Issuance:
May 6, 1991
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ATTACHMENT TO LICENSE AMENDMENT AMENDMENT NO. 29 TO FACILITY OPERATING LICENSE NO.
NPF-69 DOCKET NO. 50-410 Revise Appendix A as follows:
Remove Pa es Insert Pa es Xii 3/4 7-16 3/4 7-17 3/4 7-18 3/4 7-19 3/4 7-20 Xii 3/4 3/4 3/4 3/4 3/4 3/4 3/4 7-16 7-17 7-18 7-19 7-20 7-20a (added) 7-20b (added)
INDEX LIMITING CONDITIONS FOR OPERATION AND SURVEILLANCE RE UIREMENTS PAGE 3/4.7 PLANT SYSTEM 3/4.7.1 PLANT SERVICE WATER SYSTEMS Plant Service Vater System Operating................
Plant Service Vater System Shutdown.................
3/4.7.2 Revetment-Ditch Structure.........................'....
3/5 7-1 3/4 7-4 3/4 7-7 Table 3.7.2-1 Survey Points for Revetment-Ditch Structure.....
3/4 7-9 3/4.7.3 CONTROL ROOM OUTDOOR AIR SPECIAL FILTER TRAIN SYSTEM..
3/4 7-11 3/4.7.4 REACTOR CORE ISOLATION COOLING SYSTEM................
3/4 7-14 3/4.7.5 SNUBBERS Table 4.7.5-1 Snubber Visual Inspection Interval..............
3/4 7-16 3/4 7-20a Figure 4.7.5-1 Sample Plan for Snubber Functional Test........
3/4 7-21 3/4.7.6 SEALED SOURCE CONTAMINATION...........................
3/4 7-22 3/4 7.7 MAIN TURBINE BYPASS SYSTEM 3/4 7-24 3/4.8 ELECTRICAL POVER SYSTEMS 3/4-8.1 AC SOURCES AC Sources Operating..................
Table 4.8.1.1.2-1 Diesel Generator Test Schedule AC Sources Shutdown................................
3/4 8-1 3/4 8-12 3/4 8-13 3/4.8.2 DC SOURCES DC Sources Operating...............................
3/4 8-14 Table 4.8.2.1-1 Battery Surveillance Requirements............
3/4 8-17 DC Sources Shutdown................................
3/4 8-19 NINE MILE POINT UNIT 2 Xii Amendment No.
29
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PLANT SYSTEMS 3/4.7.5 SNUBBERS LIMITING CONDITIONS FOR OPERATION 3.7.5 All snubbers shall be OPERABLE.
The only snubbers excluded from the requirements 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.
APPLICABILITY:
OPERATIONAL CONDITIONS 1, 2, and 3 and OPERATIONAL CONDITIONS 4 and 5 for snubbers located on systems required OPERABLE in those OPERATIONAL CONDITIONS'CTION:
pith 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 4.7.5 on the supported component or declare the supported system inoperable and follow the appropriate ACTION statement for that system.
SURVEILLANCE RE UIREMENTS 4.7.5 Each snubber shall be demonstrated 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 Snubbers are categorized as inaccessible or accessible during reactor operation.
Each-of these categories (inaccessible and accessible) may be inspected independently according to the schedule determined by Table 4.7.5-1.
The visual inspection interval for each type of snubber shall be determined based upon the criteria provided in Table 4.7.5-1 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 29.
c.
Visual Ins ection Acce tance Criteria Visual inspections shall verify that (1) the snubber has no visible indications of damage or impaired OPERABILITY, (2) attachments to the foundation or supporting structure are functional, and (3) fasteners for the attachment of the snubber to the component and to the snubber anchorage are functional.
Snubbers which appear inoperable as a result NINE MILE POINT UNIT 2 3/4 7-16 Amendment No. X9 29
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PLANT SYSTEMS 3/4.7.5 SNUBBERS LIMITING CONDITIONS FOR OPERATION 4.7.5.c (continued) of visual inspections shall be classified as unacceptable and may be reclassified as acceptable for the purpose, of establishing 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 that may be generically susceptible; and (2) the affected snubber is functionally tested in the as-found condition and determined OPERABLE per Specification 4.7.5.f.
A review and evaluation shall be performed and documented to justify continued operation with an unacceptable snubber.
If continued operation cannot be justified, the snubber shall be declared inoperable and the ACTION requirements shall be met.
d-Transient Event Ins ection An inspection shall be performed of all snubbers attached to sections of systems that have experienced unexpected, potentially damaging transients, as determined from a review of operational data or a visual; inspection of the systems, within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for accessible areas and within 6 months for inaccessible areas following this determination.
In addition to satisfying the visual inspection acceptance
- criteria, freedom-of-motion of mechanical snubbers shall be verified using at least one of the following:
(1) manually induced snubber
- movement, or (2) evaluation of in-place snubber piston setting, or (3) stroking the mechanical snubber through its full range of travel.
e.
Functional Tests At least once per 18 months during shutdown, a representative sample of snubbers shall be tested using one of the following sample plans for each type of snubber.
The sample plan shall be selected before the test period and cannot be changed during the test period.
The NRC Regional Administrator shall be notified in writing of the sample plan selected before the test period or the sample plan used in the previous test period shall be implemented:
An initial representative sample of at least 10X of the total of each type of snubber shall be functionally tested either in place or in a bench test.
For any snubber(s) of a type that do not meet the functional test acceptance criteria of Specification 4.7.5.f, an additional sample of at least 1/2 the size of the initial sample lot shall be tested until the total number tested is equal to the initial sample size multiplied by the factor, 1 + C/2, NINE MILE POINT - UNIT 2 3/4 7-17 Amendment Ne.
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PLANT SYSTEMS 3/4.7.5 SNUBBERS LIMITING CONDITIONS FOR OPERATION 4.7.5.e (continued) where C is the total number of snubbers found to be unacceptable or all snubbers in the failure mode group have been tested; or 2.
An initial representative sample of 37 snubbers of each type shall be functionally tested in accordance with Figure 4.7.5-1.'C" is the total number of snubbers found not meeting the acceptance requirements of Specification 4.7.5.f.
The cumulative number of snubbers of a type tested is denoted by "N." If at any time the point plotted falls in the "Accept" region, testing of snubbers may be terminated.
When the point plotted lies in the "Continue Testing" region, additional snubbers shall be tested until the point falls in the "Accept" region or all the snubbers of that type have been tested.
The representative sample selected for the functional test sample plans shall be randomly selected from the snubbers of each type and reviewed before beginning the testing.
The review shall ensure, as far as practical, that they are representative of the various configurations, operating environments, range of size, and capacity of snubbers of each type.
Snubbers placed in the same locations as snubbers that failed the previous functional test shall be retested at the time of the next functional, test but shall not be included in the sample plan.
Testing equipment failure during functional testing may invalidate the day' testing and allow that day's testing to resume anew at a later time provided all snubbers tested with the failed equipment during the day of equipment failure are retested.
If during the functional testing, additional testing is required due to failure of snubbers, the unacceptable snubbers may be categorized into failure mode group(s).
A failure mode group shall include all unacceptable snubbers that have a given failure mode and all other snubbers sub)ect to the same failure mode.
Once a failure mode group has been established, it can be separated for continued testing apart from the general population of snubbers.
However, all unacceptable snubbers in the failure mode group shall be counted as one unacceptable snubber for additional testing in the general population.
Testing in the failure mode group shall be based on the number of unacceptable snubbers and shall continue until no more failures are found or all snubbers in the failure mode group have been tested.
Any additional unacceptable snubbers found in the failure mode group shall be counted for continued testing only for that test failure mode group.
In the event that a snubber(s) becomes included in more than one test failure NINE MILE POINT UNIT 2 3/4 7-18 Amendment Nn. ZO 29
PLANT SYSTEMS 3/4.7.5 SNUBBERS LIMITING CONDITIONS FOR'OPERATION 4.7.5.e (continued) mode group, it shall be counted in each failure mode group and shall be subject to the corrective action of each test failure mode group.
Functional Test Acce tance Criteria The snubber functional test shall verify that:
1.
Activation (restraining iction) is achieved within the specified range in both tension and compression; 2.
For mechanical
- snubbers, the force required to initiate or maintain motion of the snubber is within the specified range in both directions of travel; and Testing methods may be used to measure parameters indirectly or parameters other than those specified if those results can be correlated to the specified parameters through established methods.
ge Functional Test Failure Anal sis An engineering evaluation shall be made of each failure to meet the functional test acceptance criteria to determine the cause of the failure.
The results of this evaluation shall be used, if applicable, in selecting snubbers to be tested in an effort to determine the OPERABILITY of other snubbers irrespective of type which may be subject to the same failure mode.
For the snubbers found inoperable, an engineering evaluation shall be performed on the components to which the inoperable snubber's are attached.
The purpose of this engineering evaluation shall be to determine if the components to which the inoperable snubbers are attached were adversely affected by the inoperability of the snubbers in order to ensure that the component remains capable of meeting the designed service.
If any snubber selected for functional testing either fails to lock up or fails to move. i.e., frozen-in-place, the cause'will be evaluated and if caused by manufacturer or design deficiency, or unexpected transient event, all snubbers of the same type subject to the same defect shall be functionally tested.-
Snubbers of the same type subject to the same defect shall be categorized as one failure mode group for the purpose of additional testing per Specification 4.7.5.e.
NINE MILE POINT UNIT 2 3/4 7-19 Amendment Ne.
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PLANT SYSTEMS 3/4.7.5 SNUBBERS LIMITING CONDITIONS FOR OPERATION 4.7.5 (continued) h.
Functional Testin of Re aired and Re laced Snubber Snubbers that fail the visual inspection or the functional test acceptance criteria shall be repaired or replaced.
Replacement snubbers and snubbers that have repairs that might affect the functional test result shall be tested to meet the functional test criteria before installation in the unit.
Mechanical snubbers shall have met the acceptance criteria subsequent'o their most recent service, and the freedom-of-motion test must have been performed within 12 months before being installed in the unit.
Snubber Service Life Pro ram The service life of all snubbers shall be monitored to ensure that the
'ervice life is not exceeded between surveillance inspections.
The maximum expected service life for various seals,
- springs, and other critical parts shall be determined and established on the basis of engineering information and shall be extended or shortened on the basis of monitored test results and failure history.
Critical parts shall be replaced so that the maximum service life will not be exceeded during a period when the snubber is required to be OPERABLE.
The parts replaced shall be documented and the documentation shall be retained in accordance with Specification 6.10.1.2.
NINE MILE POINT UNIT 2 3/4 7-20 Amendment No.
29
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TABLE 4.7.5-1 SNUBBER VISUAL INSPECTION INTERVAL NUMBER OF UNACCEPTABLE BBER Population or Category Noes 1 and 2
Column A Column B
Column C
Extend Interval Repeat Interval
'Reduce Interval Note 3 and 6
Note 4 an Notes 5 and 6
0 80 2
100 150 200 13
'00 12 25 400 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'ound 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
]ointly.
- 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.
NINE MILE POINT - UNIT 2 3/4 7-20a Amendment No. 29
) 4 TABLE 4.7.5-1 (continued)
NUBBER VISUAL INSPECTION INTERVAL Note 3:
Note 4:
V 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 4S months.
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:
Note 6:
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 differences in the numbers in Columns B and C.
V The provisions of Specification 4.0.2 are applicable for all inspection intervals up to and including 48 months.
NINE MILE POINT - UNIT 2 3/4 7-20b Amendment No. 29
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