ML20081L020
| ML20081L020 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/25/1991 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20081L016 | List: |
| References | |
| GL-90-09, GL-90-9, NUDOCS 9107020311 | |
| Download: ML20081L020 (6) | |
Text
-
Double No. 50-423 B13866 Millstone Nuclear Power Station, Unit No. 3 Proposed lechnical Specification Change Snubber Visual Inspection Interval i,
l-l l
l June 1991 9107020411 910625 PDR ALOCK 05000423 P
4 -
INDEX
'1IMITING CONDITIONS FOR OPERATION AND SURVEILLANCE RE0VIREMENTS SECTION EAGE TABLE 3.7-3 STEAM LINE SAFETY VALVES PER L00P.....................
3/4 7-3 Auxil i ary Feedwater System...............................
3/4 7-4 Demineralized Water Storage Tank.........................
3/4 7-6 Sp ec i f i c Ac t i v i ty........................................
3/4 7-7 TABLE 4.7-1 SECONDARY COOLANT SYSTEM SPECIFIC ACTIVITY SAMPLE j
AND ANALYSIS PR0 GRAM.....................................
3/4 7-8 Main Steam Line Isol ation Valves.........................
3/4 7-9 3/4.7.2 STEAM GENERATOR PRESSURE / TEMPERATURE LIMITATION..........
3/4 7-10 3/4.7.3 REACTOR PLANT COMPONENT COOLING WATER SYSTEM.............
3/4 7-11 3/4.7.4 SERVICE WATER SYSTEM.....................................
3/4 7-12 3/4.7.5 ULTIMATE HEAT SINK.......................................
3/4 7-13 3/4.7.6 FLOOD PR0TECTION.........................................
3/4 7-14 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM................
3/4 7-15 3/4.7.8 CONTROL ROOM ENVELOPE PRESSURIZATION SYSTEM..............
3/4 7-18 3/4.7.9 AUXILIARY BUILDING FILTER SYSTEM.........................
3/4 7-20 3/4.7.10 SNUBBERS.................................................
3/4 7-22 TABLE 4.7-2 SNUBDER VISUAL INSPECTION INTERVAL...................
3/4 7-26a FIGURE 4.7-1 SAMPLE PLAN 2) FOR SNUBBER FUNCTIONAL TEST...........
3/4 7-27 3/4.7.11 SEALED SOURCE CONTAMINATION..............................
3/4 7-28 3/4.7.12 FIRE SUPPRESSION SYSTEMS Fire Suppression Water System............................
3/4 7-30 Spray and/or Sprir.kl er Systems...........................
3/4 7-33 CO Systems..............................................
3/4 7-35 2
H a l o n Sy s t e m s............................................
3/4 7-37 Fire Hose Stations.......................................
3/4 7-38
. TABLE 3.7-4 FIRE HOSE STATIONS....................................
3/4 7-39 Yard Fire Hydrants and Hydrant Hose Houses...............
3/4 7-40 TABLE 3.7-5 YARD FIRE HYDRANTS AND ASSOCIATED HYDRANT HOSE HOUSES.
3/4 7-41 3/4.7.13 FIRE RATED ASSEMBLIES............................
3/4 7-42 3/4.7,14 AREA TEMPERATURE M0NITORING..............................
3/4 7-44 TABLE 3.7-6 AREA TEMPERATURE MONITORIN0..........................
3/4 7-45 MILLSTONE - UNIT 3 x
0048
PLANT SYSTEMS
~3/4.7.10 SNVBBERS LIMITING CONDITION FOR OPERATION 3
3.7.10 All snubbers snall be OPERABLE.
The only snubbers excluded from the
]
requirements 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-related 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 4.7.109. on the attached component or declare the attached system inoperable and follow the appropriate ACTION statement for that system.
SURVEILLANCE RE0VIREMENTS 4.7.10 Each snubber shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program and the requirements of Specification 4.0.5.
a.
Insoection Tvoes As used in this specification, " type of snubber" shall mean snubbers of the same design and manufacturer, irrespective of capacity.
b.
Visual Inspections 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 4.7-2.
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 c.
Visual Insoection Acceptance 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 of visual inspections shall be classified as unacceptable and may be reclassified 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 MILLSTONE - UNIT 3 3/4 7-22 Amendment No. E2 0049
PLANT SYSTEMS SURVEILLANCE REOUIREMENTS (Continued) type that may be generically snubber is functionally tested in the susceptibic, and determined OPERABLE per Specification 4 7 10 fa s-foun(d2) th condition and connected to an inoperable common hydraulic fluid resAll snubbers f counted as interval.
unacceptable for ervoir shall be determining the next inspection to justify continued operation with an unacA review and continued umented operation cannot be justified, the snubber shall be ceptable snubber.
If declared inoperable and the ACTION requirements sh ll b d.
a e met.
Transient Event Inspection 1
An inspection shall be performed of all snubbers attached to damaging transients as determined from a reviews and a visual e
potentially inspection of the systems within 6 months f llof ope, rati such an event.
In addition to satisfying the visual acceptance criteria, freedom-of-motion of mechanical o owing be verified using inspection at least induced snubber mov one of the following: snubbers shall piston setting; or (ement; full range of travel, ) strok (1
in-plac)e manually or 3
of snubber e.
Functional Tests During the first refueling shutdown and at least thereafter during shutdown, a representative once per 18 months The sample plan for each type shall be selectede sample of r 'bbers of g sa..ie plans.
period and cannot be changed during the test period.
The NRC prior to the test plan selected for each snubber type prior to the r
ng of the sample sample plan used in the prior test period shall be i est period or the mplemented:
1)
At functionally tested either in-place or in a bleast 1 r shall be each snubber of a type that does not meet the functi ench test.
For acceptance critoria of Specification 4.7.10f of that type of snubber shall be functionally tested onal test
., an additional 5%
more failures are found or until all s,4bbers of th t t been functionally tested; or until no a
ype have MILLSTONE - UNIT 3 3/4 7-23
TABLE 4.7-2 SNUBBER VISUAL INSPECTION INTERVAL
^
NUMBER OF VNACCEPTABLE SNVBBERS Population Column A Column B Column C or Category Extend Interval Repeat Interval Reduce Interval (Notes 1 and 21 (Notes 3 and 6)
(Notes 4 and 6)
(Notes 5 and 6) 1 0
0 1
80 0
0 2
100 0
1 4
150 0
3 8
200 2
5 13 300 5
12 25 400 8
18 36 500 12 24 48 750 70 40 78 1000 or greater 29 56 109 Note 1:
The next visual inspecticn interval for a snubber population or category size shall be determined based upon the previous inspection intetval 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:
liiterpolation 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 included a fractional value of unacceptable snubbers as datermined by interpolation.
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 no 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,,, the next inspection interval shall be the seme as the previous interval.
Note 5:
If the number of unacceptable snubbers is equal to or greator than the number in Celumn 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 intemolation, that is, the previous interval shall be reduced by a factor that is one-third of the ratio of the difference between the number uf unacceptable snubbers found during the previous interval and the number in Col umn B to the difference in the numbers in Columns B and C.
MILLSTONE - UNIT 3 3/4 7-26a 0050
y 5
TABLE 4.7-2 SNUBBER VISUAL INSPECTION INTERVAL Note 6:
The provisions of Specification 4.0.2 are applicable for all inspection intervals up to and including 48 months.
i i
MILLSTONE - UNIT 3 3/4 7-26b 0050
... - - -