ML20134J964
| ML20134J964 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 11/12/1996 |
| From: | Wigginton D NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20134J966 | List: |
| References | |
| NUDOCS 9611180158 | |
| Download: ML20134J964 (13) | |
Text
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p er49 g
UNITED STATES g
j NUCLEAR REGULATORY COMMISSION l
e WASHINGTON, D.C. 2006H001
\\,...../
l l
ENTERGY GULF STATES. INC. **
CAJUN ELECTRIC POWER COOPERATIVE AND ENTERGY OPERATIONS. INC.
DOCKET NO. 50-458 j
RIVER BEND STATION. UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 89 License No. NPF-47 l.
The Nuclear Repatory Commission (the Commission) has found that:
A.
The application for amendment by Entergy Gulf States, Inc.* (the licensee) dated August 1, 1996, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act),
and the Comission's rules and regulations set forth in 10 CFR Chapter I; B.
The facility will operate in conformity with the anplication, as amended, the provisions of the Act, and the rules and regulations of the Comission; C.
There is reasonable assurance:
(1) 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 Comission's regulations; D.
The issuance of this license amendment will not be inimical to the comon defense and security or to the health and safety of the public; and
- E01 is authorized to act as agent for Entergy Gulf States, Inc, which has been authorized to act as agent for Cajun Electric Power Cooperative, and has exclusive responsibility and control over the physical construction, operation and maintenance of the facility.
- Entergy Gulf States, Inc., which owns a 70 percent undivided interest in River Bend, has merged with a wholly owned subsidiary of Entergy Corporation. Entergy Gulf States, Inc. was the surviving company in the merger.
9611100158 961112 PDR ADOCK 05000458 p
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. E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have i
been satisfied.
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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-47 is hereby 1
amended to read as follows:
(2) Technical Specifications and Environmental Protection Plan The Technical Specifications contained in Appendix A, as revised through Amendment No. 89 and the Environmental Protection Plan contained in Appendix B, are hereby incorporated in the license.
E01 shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.
3.
The license amendment is effective as of its date of issuance.
j FOR THE NUCLEAR REGULATORY COMMISSION j
p David L.
igginton, Senior Project Manager Project Directorate IV-1 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation
Attachment:
Changes to the Technical Specifications Date of Issuance: November 12, 1996'
4 ATTACHMENT TO LICENSE AMENDMENT NO. Rg FACILITY OPERATING LICENSE NO. NPF-47 l
l DOCKET NO. 50-458 Replace the following pages of the Appendix A Technical Specifications with the attached pages. The revised pages are identified by Amendment number and contain marginal lines indicating the areas of change.
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REMOVE INSERT I
3.6-45 3.6-45 3.6-68 3.6-68 3.6-69 3.6-69 3.6-70 3.6-70 B 3.6-81 B 3.6-81 B 3.6-82 B 3.6-82 B 3.6-133 B 3.6-133 8 3.6-134 B 3.6-134 B 3.6-135 B 3.6-135 B 3.6-136 B 3.6-136 i
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l I
,i
Pricary Containment /Drywell Hydrogen Mixing System 3.6.3.3 4
ACTIONS (continued)
CONDITION REQUIRED ACTION COMPLETION TIME 1
C.
Required Action and C.1 Be in MODE 3.
12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> associated Completion Time not met.
i 4
SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.6.3.3.1 Operate each primary containment /drywell Every COLD hydrogen mixing subsystem for SHUTDOWN, if 2 15 minutes.
not performed within the i
previous 92 days.
SR 3.6.3.3.2 Verify each primary containment /drywell 18 months hydrogen mixing subsystem flow rate is l
2 600 cfm.
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RIVER BEND 3.6-45 Amendment No. 81,89
Drywell Isolation Valves 3.6.5.3 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A.
(continued)
A.2
NOT E--- ------
Isolation devices in high radiation areas may be verified by use of administrative i
means.
Verify the affected Prior to penetration flow path entering MODE 2 is isolated.
or 3 from i
MODE 4, if not performed within the previous 92 days B.
One or more B.1 Isolate the affected 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> i
penetration flow paths penetration flow path with two drywell by use of at least isolation valves one closed and inoperable.
de-activated automatic valve, closed manual valve, blind flange, or check valve with flow through the valve secured.
C.
One or more Hydrogen C.1 Isolate the affected Immediately Mixing penetration penetration flow path flow paths not within by use of at least the limitations one closed and de-specified in SR activated automatic 3.6.5.3.6 valve, blind flange, or check valve with flow through the valve secured.
D.
Required Action and D.1 Be in MODE 3.
12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> associated Completion Time not met.
AND D.2 Be in MODE 4.
36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> RIVER BEND 3.6-68 Amendment No. B189
i Drywell Isolation Valves 3.6.5.3 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.6.5.3.1 Verify each 24 inch drywell purge 31 days i
isolation valve is sealed closed.
NOTE--------------------
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Not required to be met when the primary i
containment /drywell hydrogen mixing inlet or outlet valves are open for pressure control.
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Verify each primary containment /drywell 31 days hydrogen mixing isolation valve is closed.
NOTES------------------
1.
Valves and blind flanges in high radiation areas may be verified by use of administrative means.
2.
Not required to be met for drywell isolation valves that are open under administrative controls.
Verify each drywell isolation manual Prior to 4
valve and blind flange that is required entering MODE 2 to be closed during accident conditions or 3 from is closed.
MODE 4, if not performed in the previous 92 days (continued)
RIVER BEND 3.6-69 Amendment No. 81,89
)
i Drywell Isolation Valves 3.6.5.3 3
j SURVEILLANCE REQUIREMENTS (continued) f SURVEILLANCE FREQUENCY i
SR 3.6.5.3.4 Verify the isolation time of each power In accordance operated and each automatic drywell with the isolation valve is within limits.
Inservice Testing Program i
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SR 3.6.5.3.5 Verify each automatic drywell isolation 18 months valve actuates to the isolation position i
j on an actual or simulated isolation
{
signal.
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SR 3.6.5.3.6 Verify the c mulative time that the 31 days primary containment /drywell hydrogen mixing inlet or outlet penetrations are i
open to be 5 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> per 365 days in Modes 1 and 2 and s 90 hours0.00104 days <br />0.025 hours <br />1.488095e-4 weeks <br />3.4245e-5 months <br /> per 365 days j
in Mode 3.
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RIVER BEND 3.6-70 AmeMment No. St. 89
Pricary Containment /Drywell Hydrogen Mixing System B 3.6.3.3 MSES ACTIONS B.I and B.2 (continued)
With two primary containment /drywell hydrogen mixing subsystems inoperable, the ability to perform the hydrogen control function via alternate capabilities must be verified by administrative means within I hour. The alternate hydrogen control capabilities are provided by one division of the hydrogen igniters. The I hour Completion Time allows a reasonable period of time to verify that a loss of hydrogen control function does not exist. The verification may be performed as an administrative check by examining logs or other information to determine the availability of the alternate hydrogen control system. It does not mean to perform the surveillances needed to demonstrate OPERABILITY of the alternate hydrogen control system. If the ability to perform the hydrogen control function is maintained, continued operation is permitted with two primary containment /drywell hydrogen mixing subsystems inoperable for up to 7 days. Seven days is a reasonable time to allow two primary containment /drywell hydrogen mixing subsystems to be inoperable because the hydrogen control function is maintained and because of the low probability of the occurrence of a LOCA that would generate hydrogen in amounts capable of exceeding the flammability limit.
M If any Required Action and associated Completion Time cannot be met, the plant must be brought to a MODE in which the LC0 does not apply. To achieve this status, the plant must be brought to at least MODE 3 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. The allowed Completion Time of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> is reasonable, based on operating experience, to reach MODE 3 from full power conditions in an orderly manner and without challenging plant systems.
SURVEILLANCE SR 3.6.3.3.1 REQUIREMENTS Operating each primary containment /drywell hydrogen mixing subsystem from the control room for 2 15 minutes ensures that each subsystem is OPERABLE and that all associated controls are functioning properly.
It also ensures that blockage, fan failure, or excessive vibration can be detected for corrective action. The frequency is restricted to COLD SHUTDOWN conditions to limit the opening of the hydrogen mixing inlet and outlet valves during MODES 1, 2, (continued) l RIVER BEND B 3.6-81 Revision No.2-8
Prinary Centainment/Drywell Hydrogen Mixing System l.
B 3.6.3.3 j
BASES SURVEILLANCE SR 3.6.3.3.1 (continued) l REQUIREMENTS 1
and 3, because these valves have never been demonstrated j
capable of closing during accident conditions in the drywell (Reference 3). The 92 day frequency is consistent with i
operating experience, the known reliability of the fan and l
controls, and the two redundant subsystems available.
i SR 3.6.3.3.2 6
Verifying that each primary containment /drywell hydrogen j
mixing subsystem flow rate is ;t 600 cfm ensures that each l
subsystem is capable of maintaining drywell hydrogen l
concentrations below the flammability limit. The 18 month Frequency is based on the need to perform this Surveillance under the conditions that apply during a plant outage when the drywell boundary is not required. Operating experience has shown that these components usually pass the Surveillance when performed at the 18 month Frequency.
i Therefore, the Frequency was concluded to be acceptable from I
a reliability standpoint.
l REFERENCES 1.
Regulatory Guide 1.7, Revision 2.
)
2.
USAR, Section 6.2.5.
j l
3.
CR 96-0767.
l 1
i l RIVER BEND B 3.6-82 Revision No.2-8 w
e
Drywell Isolation Valves B 3.6.5.3 BASES ACTIONS L1 (continued)
With one or more penetration flow paths with two drywell isolation valves inoperable, the affected penetration flow path must be isolated. The method of isolation must include the use of at least one isolation barrier that cannot be adversely affected by a single active failure.
Isolation barriers that meet this criterion are a closed and de-activated automatic valve, a closed manual valve, a blind flange, and a check valve with flow through the valve secured. The 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> Completion Tire is acceptable due to the low probability of the inoperable valves resulting in excessive drywell leakage and the low probability of the limiting event for drywell leakage occurring during this short time frame. The Completion Time is reasonable, considering the time required to isolate the penetration, and the probability of a DBA, which requires the drywell isolation valves to close, occurring during this short time 1s very low.
.L.1 With One or more hydrogen mixing penetration flow path not within the limitations specified in SR 3.6.5.3.6, the penetration flow paths for hydrogen mixing must be isolated immediately.
Since the hydrogen mixing valves have never been demonstrated capable of closing under accident conditions in the drywell, closing the valves ensures drywell integrity should the limitations of SR 3.6.5.3.6 be exceeded.
l D.1 and 0.2 If any Required Action and associated Completion Time cannot be met, the plant must be placed in a MODE in which the LCO does not apply. To achieve this status, the plant must be brought to at least MODE 3 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and to MODE 4 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The allowed Completion Times are reasonable, based on operating experience, to reach the required plant conditions from full power conditions in an orderly manner and without challenging plant systems.
(continued) l RIVER BEND B 3.6-133 Revision No. 2-8
Drywell Isolation Valves B 3.6.5.3 i'
BASES SURVEILLANCE SR 3.6.5.3.1 REQUIREMENTS Each 24 inch drywell purge isolation valve is required to be verified sealed closed at 31 day intervals. This Surveillance is required since the drywell purgeisolation valves are not qualified to close under accident conditions.
This SR is designed to ensure that a gross breach of drywell is not caused by an inadvertent or spurious drywell purge isolation valve opening. Detailed analysis of these 24 inch drywell purge valves failed to conclusively demonstrate their ability to close during a LOCA in time to support drywell OPERABILITY. Therefore, these valves are required to be in sealed closed position during MODES 1, 2, and 3.
These 24 inch drywell purge valves that are sealed closed must have motive power to the valve operator removed. This can be accomplished by de-energizing the source of electric i
power or removing the air supply to the valve operator.
In this application, the term " sealed" has no connotation of leakage within limits. The Frequency is based on purge valve use during unit operations.
SR 3.6.5.3.2 This SR ensures that the primary containment /drywell hydrogen mixing isolation valves are closed as required or, if open, open for an allowable reason for limited periods of time. This SR has been modified by a Note indicating the SR is not required to be met when the primary containment /drywell hydrogen mixing inlet or outlet valves l
are open for pressure control. The 31 day Frequency is consistent with the valve requirements discussed under SR 3.6.5.3.1.
SR 3.6.5.3.3 This SR requires verification that each drywell isolation manual valve and blind flange that is required to be closed during accident conditions is closed. The SR helps to tnsure that drywell bypass leakage is maintained to a minimum. Due to the location of these devices, the frequency specified as " prior to entering MODE 2 or 3 from M00E 4, if not performed in the previous 92 days," is appropriate because of the inaccessibility of the devices and because these devices are operated under administrative controls and the probability of their misalignment is low.
Two Notes are added to this SR. The first Note allows valves and blind flanges located in high radiation areas te (continueG l RIVER BEND B 3.6-134 Revision No. 2-8
1 i
4 Drywell Isolation Valves B 3.6.5.3 i
}
i BASES 5
1 j
SURVEILLANCE SR 3.6.5.3.4 REQUIREMENTS j
(continued) be verified by use of administrative controls. Allowing verification by administrative controls is considered acceptable since access to these areas is typically restricted during MODES 1, 2, and 3.
Theretee, the
>robability of misalignment of these dovices, once they have
>een verified to be in their proper
>osition, is low. A second Note is included to clarify tiat the drywell isolation valves that are open under administrative controls i
are not required to meet the SR during the time that the l
devices are open.
j Verifying that the isolation time of each power operated and i
each automatic drywell isolation valve is within limits is required to demonstrate OPERABILITY. The isolation time i
test ensures the valve will isolate in a time period less than or equal to that assumed in the safety analysis. The isolation time and Frequency of this SR are in accordance with the Inservice Testing Program.
i.
l SR 3.6.5.3.5 Verifying that each automatic drywell isolation valve closes i
on a drywell isolation signal is required to prevent bypass leakage from the drywell following a DBA. This SR ensures each automatic drywell isolation valve will actuate to its isolation position on a drywell isolation signal. The LOGIC SYSTEM FUNCTIONAL TEST in SR 3.3.6.1.6 overlaps this SR to l
provide :omplete testing of the safety function. The 18 month Frequency is based on the need to perform this Surveillance under the conditions that apply during a plant 1
outage and the potential for an unplanned transient if the Surveillance were performed with the reactor at power, since isolation of penetrations would eliminate cooling water flow and disrupt the normal operation of many critical components. Operating experience has shown these components usually pass this Surveillance when performed at the 18 month Frequency. Therefore, the Frequency was concluded to be acceptable from a reliability standpoint.
SR 3.6.5.3.6 This SR ensures that the hydrogen mixing valves remain closed during Modes 1, 2, and 3, or, if open, are only open for a limited period of time over a 365 day cycle. Since (continued) l RIVER BEND B 3.6-135 Revision No.2-8
Drywell Isolation Valves B 3.6.5.3 BASES SURVEILLANCE SR 3.6.5.3.6 REQUIREMENTS (continued) the hydrogen mixing isolation valves have never been demonstrated capable of closing under accident conditions in the drywell, this SR applies restrictions to the opening of these valves (Reference 3). The frequency of this SR is consistent with the frequency of SR 3.6.3.2 and allows the administrative tracking of the hours open to be performed concurrently with the isolation valve closure verification.
REFERENCES 1.
USAR, Section 6.2.4.
2.
USAR, Table 6.2-40.
l 3.
CR 96-0767.
l RIVER BEND B 3.6-136 Revision No.2-8 4
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