ML17058A621
| ML17058A621 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 07/13/1990 |
| From: | Capra R Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17058A622 | List: |
| References | |
| NPF-69-A-019 NUDOCS 9007190228 | |
| Download: ML17058A621 (16) | |
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t UNITED STATES t NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 NIAGARA-MOHAMK.POWER. CORPORATION DOCKET NO. 50-410 NINE-MILE POINT. NUCLEAR STATION UNIT 2 AMENDMENT TO FACILITY OPERATING-LICENSE Amendment No.
19 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 November 17, 1989, as amended April 26, 1990, 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 I; 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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(2),
Technical S ecifications and-Environmental Protection Plan The Technical Specifications contained in Appendix A and the Environmental Protection Plan contained in Appendig B, both of which are attached
- hereto, as revised through Amendment No. i9 are hereby incorporated into this license.
Niagara Mohawk Power Corporation 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.
FOR THE NUCLEAR REGULATORY COViHISSION
Attachment:
Changes to the Technical Specifications Date of Issuance:
duly 13, 1990 81m M robert A. Capra, Director Project Directorate I-1 Division of Reactor Projects
- I/II Office of Nuclear Reactor Regulation
~
ATTACHMENT TO LICENSE. AMENDMENT AMENDMENT NO. - i9. TO.FACILITY OPERATING LICENSE NO. NPF-69 DOCKET NQ. 50-410 Revise Appendix A as fo11ows:
Remove Pa es 3/4 7-16 3/4 7-18 3/4 7-19 3/4 7-20 3/4 7-21 Insert.Pa es 3/4 7-16 3/4 7-18 3/4 7-19 3/4 7-20 3/4 7-21
A PLANT SYSTEMS l
3/4.7.5 SNUBBERS 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.
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 ihe 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.
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.
~lb b 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 category may be inspected independently according to the schedule below.
The first inservice visual inspection of snubbers shall be performed after 2 months but within 12 months of commencing POWER OPERATION and shall include all snubbers.
If all snubbers are found OPERABLE during the first inservice visual inspection, the second inservice visual inspection shall be performed at the first refueling outage.
Otherwise, subsequent visual inspections shall be performed in accordance with the following schedule; NINE MILE POINT UNIT 2 3/4 7-16 Amendment No.
19
V
PLANT SYSTEMS SNUBBERS 4.7.5 (Continued) e.
Functional Tests Ouring the first refueling shutdown and at least once per 18 months thereafter 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:
l.
An initial representative sample of at least 10'L 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
+ CI2, 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'.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.
Nhen 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 practicable, 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' later time provi ded 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 NINE MILE POINT - UNIT 2 3/4 7-18 Amendment No.
19
sc
PLANT SYSTEMS SNUBBERS 4.7.5.e (Continued) unacceptable snubbers that have a given failure mode and all other snubbers subject to the same fai lure 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 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 action) 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.
Functional Test Failure Anal sis An engineering evaluat/on shall be made of each failure to meet the functional test acceptance criteria to determine the cause of the failure.
The results of'his evaluation shall be used, if applicable, in selecting snubbers to be tested in an effort to determine the OPERA8ILITY of other snubbers irrespective of type which may be subject to th'e same fai lure mode.
For the snubbers found inoperable, an engineering evaluation shall be performed on the components to which the inoperable snubbers 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.
NINE MILE POINT - UNIT 2 3/4 7-19 Amendment No.
19
PLANT SYSTEMS SNUBSERS 4.7.5.g (Continued)
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.
h.
Functional Testin of Repaired and Re laced Snubbers 1
Snubbers that fail the visual inspe'ction 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 to their most recent service, and the freedom-of-motion test must have been performed within 12 months before being installed in the unit.
i.
Snubber Service Life Pro ram The service life of all snubbers shall be monitored to ensure that the service life is not exceeded between surveillance inspections.
The maximum expected service life f'r various seals,
- springs, and other critical parts shall be determined and established on the basis of engineering information and shal1 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 OPERA8LE.
The parts replacements 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.
19
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