ML20082S510
| ML20082S510 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 09/11/1991 |
| From: | WOLF CREEK NUCLEAR OPERATING CORP. |
| To: | |
| Shared Package | |
| ML20082S486 | List: |
| References | |
| NUDOCS 9109170172 | |
| Download: ML20082S510 (5) | |
Text
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Att~ chm *nt V t0 ET 91-0135
' Pag] 1 of 5 ATTACIMENT V PROPOSED TECIINICAL SPECIFICATION CllANCE 9109170172 910911 PDR ADOCK OSOC0482 P
' Attachment V to ET 91-0135 Page 2 of 5 r
CONTAINMENT SYSTEMS f
I i
CONTAIN'4ENT COOLING SYSTEM LIMITING CONDITION FOR OPERATION l
P 3.6.2.3 Two independent groups of containment cooling fans shall be OPERABLE with two fan systems to each group.
APPLICABILITY: MODES 1, 2, 3, and 4.
ACTION:
a.
With one group of the above required containment cooling fans inoperable and both Containnnt Spray Systems OPERABLE, restore the inoperable group of cooling fans to OPERABLE status within 7 days or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLO SHUT 00WN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
I b.
With-two groups of the abovr required containment cooling fans inoperable and both Containment Spray Systems OPERABLE, restore at
{
1 east one group of cooling fans to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLO SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
Restore both above required groups of cooling fans to OPERABLE st/.tus within 7 days of initial loss or be in at least HOT STAN0BY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in r
l COLO SHUTOOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
With one group of the above required containment cooling fans c.
inoperable and one Containment Sprey System inoperable, restore the inoperable Containment Spray System to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STANOBY withiu the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUT 00VN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
Restore the inoperable group I
of containment cooling fans to OPERABLE status within 7 days of ini-t tial loss or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTOOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
l SURVEILLANCE REQUIREMENTS i
5 4.6.2.3 Each group of containment cooling fans shall be demonstrated OPERABLE:
a.
At least once per 31 days by:
1)
Starting each non-operating fan group from the control room, and
(
verifying that each fan group operates for at least 15 minutes, i
and 1
2)
"crify!r.g : 00!%g u:ter 'lce rate 'f grectcr thar, er equal t0
- nsert A i 1050 gp-t each cecler group.
b.
At least once per 18 months by verifying that on a Safety Injection test signal, the fans start in slow speed or, if operating, shift to slow speed and the cooling water flow rate increases to at least 2000
-40sn-gpm to each cooler group.
WOLF CREEK - UNIT 1 3/4 6-15 Amendment No. 38 t
4ttachment V to ET 91-0135
'P8ge 3 of 5 CONTAINMEN1 SYSTEMS BASES 1
3/4.6.1.4 INTERNAL PRESSURE The limitations on containment internal pressure ensure that: (1) the containment structure is prevented from exceeding its design negative pressure i
differential with respect to the outside atmosphere of 3.0 psig, and (2) the containment peak pressure does not exceed the design pressure o' 60 psig during steam reak conditions.
48.9 The max rnum peak pressure expected to be obtained from a steam line break event is sig.
The limit of 1.5 psig for initial positive containment pressure will lirnit the total pressure to -
psig, which is less than design pressure and is consistent vith the analyses.
3/4.6.1.5 AIR TEMPERATURE
- The limitations on containment average air temperature ensure that the overall containment average air temperature does not exceed the initial temperature condition assumed in the safety analysis for a steam line break accident.
Measurements shall be made at all listed locations, whether by fixed or portable instruments, prior to determining the average air temperature.
3/4.6.1.6 CONTAINMENT VESSEL STRUCTURAL INTEGRITY 60 4 This limitation ensures that the structural inte it he containment will be maintained in accordance with safety analyc 's requircirants for the life l
of the facility:
Structural integrity is requir to ensure that the contain-l ment will withstand the maximum pressure of-50-4sig in the event of a steam line break accident.
The measurement of containment tendon lif t-off force, the tensile tests of the tendon wires or strands, the visual examination of tendons, anchorages and exposed interior and exterior surfaces of the contain-ment, and the Type A leakage test are sufficient to demonstrate this capability.
The Surveillance Requirements for demonstrating the containment's structural integrity are in compliance with the recommendations of proposed Regulatory Guide 1.35, " Inservice Surveillance of Ungrouted Tendons in Pre-stressed Concrete Containment Structures," April 1979, and proposed Regulatory Guide 1.35.1, " Determining Prestressing Forces for Inspection of Prestressed Concrete Containments," Ap-il 1979.
The required Special Reports from any engineering evaluation of containment abnormalities shall include a description of the tendon condition, the condition 7
of the concrete (especially at tendon anchorages), the inspection procedure, i
the tolerance on cracking, the results of the engineering evaluation and the l
corrective actions taken.
l l
WOLF CREEK - UNIT 1 B 3/4 6-2 1
Attachment V to ET 91-0135
- Page 4 of 5 o
_BiSES
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SPRAY ADDITIVE SYSTEM (Continued) solution recirculated within containment after a LOCA.
This pH band minimizes the evolution of iodine and minimizes the effect of chloride and caustic stress corrosion on mechanical systems and components.
The contained solution volume limit includes an allowance for solution not usable because of tank discharge line location or other physical characteristics.
The educator flow test of 52 gpm with RWST water is equivalent to 40 gpm NaOH solution.
These assumptions are consistent with the iodine removal ef ficiency assumed in the safety analyses.
3/4.6.2.3 CONTAINMENT COOLING SYSTEM The OPERABILITY of the Containment Cooling System ensures that: (1) the containment air temperature will be maintained within limits during normal operation, and (2) adequate heat :emoval capacity is available when operated in conjunction with the Containment Spray Systems during post-LOCA conditions 7 The Containment Cooling System and the Containment Spray System are d".Y redundant to each other in providing post accident cooling of the containment atmosphere.
As a result of this redundancy in cooling capability, the allowable out-of-service time requirements for the Containment Cooling System have been appropriately adjusted.
Hove"ct, the allowable out-of-service time requirements for the Containment Spray System have been maintained consistent with that assigned other inoperable ESF equipment since the Containment Spray System also provides a mechanism for removing iodine from the containment atmosphere.
3/4.6.3 CONTAINMENT ISOLATION VALVES
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The OPERABILITY of the containment isolation valves ensures that the containment atmosphere will be isolated from the outside environment in the event of a release of radioactive material to the containment atmosphere or pressurization of the containment and is consistent with the requirements of GDC54 thru 57 of Appendix A to 10 CFR Part 50.
Containment isolation within the time limits specified for those isolation valves designed to close auto-matically ensures that the release of radioactive material to the environment will be consistent with the assumptions used in the analyses for a LOCA.
3/4.6.4 COMBUSTIBLE GAS CONTROL The OPERABILITY of the equipment and systems required for the detection and control of hydrogen gas ensures that this equipment will be available to maintain the hydrogen concentration within containment below its flammable limit during post-LOCA conditions.
Either recombiner unit is capable of con-trolling the expected hydrogen generation associated with: (1) zirconium-water reactions, (2) radiolytic decomposition of water, and (3) corrosion of metals within containment.
Operation of the Emergency Exhaust System with the heaters operating for at least 10 continuous hours in a 31-day period is sufficient to reduce the buildup of moisture on the adsorbers and HEPA filters.
These Hydro-gen Control Systems are consistent with the recommendations of Regulatory Guide 1.7, " Control of Combustible Gas Concentrations in Containment following a Loss-of-Coolant Accident," Revision 2, November 1978.
Adequate mixing of the containment atmosphere following a LOCA is ensured by natural circulation without reliance on a hydrogen mixing systems.
This mixing action will prevent localized accumulations of hydrogen from exceeding the flammable limit.
WOLF CREEK - UNIT 1 B 3/4 6-4
.AttocbmentVtoET 91-0135 Pcgo 5 of 5 i
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INSERTS Insert A t
- 2) Verifying that each valve (manual, power-operated, or automatic) in the cooling water flow path serving the containment coolers that is not
- locked, sealed, or otherwise secured in position, is in its correct position.
Insert B
[
The required design cooling water flow to the Containment Cooling System is verified by the surveillance testing requirements of Specification 4.6.2.3(b) which is performed at 18 month intervals.
The testing requirements of Specification 4.6.2.3(a),
performed at 31 day intervals, i
ensure that the fan units and the cooling water flow paths (supply and return) from the Essential Service Water System headers are OPERABLE.
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