ML18153B402
| ML18153B402 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 12/10/1993 |
| From: | VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| Shared Package | |
| ML18153B401 | List: |
| References | |
| RTR-NUREG-1431 GL-93-05, GL-93-5, NUDOCS 9312200136 | |
| Download: ML18153B402 (10) | |
Text
S.
T.
- u.
TS 1.0-7 SITE BOUNDARY The site boundary shall be that line beyond which the land is not owned, leased, or otherwise controlled by the licensee.
UNRESTRICTED AREA An unrestricted area shall be an area access to which is neither limited or controlled by the licensee.
MEMBER(S) OF THE PUBLIC Member(s) of the public shall include all individuals who by virtue of their occupational status have no formal association with the plant. This category shall include non-employees of the licensee who are permitted to use portions of the site for recreational, occupational, or other purposes not associated with plant functions. This category shall D.Q1 include non-employees such as vending machine servicemen or postmen who, as part of their formal job function, occasionally enter an area that is controlled by the licensee for purposes of protection of individuals from exposure to radiation and radioactive materials.
V.
STAGGERED TEST BASIS A staggered test basis shall consist of:
- a.
A test schedule for n systems, subsystems, trains or other designated components obtained by dividing the specified test interval into n equal subintervals, and
- b.
The testing of one system, subsystem, train, or other designated component at the beginning of each subinterval.
I
\\ -;:
Amendment Nos.
TABLE 4.1-2A (CONTINUED)
MINIMUM FREQUENCY FOR EQUIPMENT TESTS DESCRIPTION JEST FREQUENCY
- UFSAR SECTION REFERENCE
- 18.
Primary Coolant System Functional
- 19.
Containment Purge MOV Leakage Functional
- 20.
Containment Hydrogen Analyzers
- a. Channel Functional Test
- 21.
RCS Flow
- 22.
RWST Parameters
- b. Channel Calibration Test
- 1. Sample gas used:
One volume percent
(+/-0.25%) hydrogen, balance nitrogen Four volume percent
(+/-0.25%) hydrogen, balance nitrogen
- 2. Channel Calibration test will include startup and operation of the Heat Tracing System Flow~ 273,000 gpm
- a. Temperature s 45°F
- b. Volume~ 387,100 gallons
- 1. Periodic leakage testing(a)(b) on each valve listed in Specification 3.1.C.7a shall be accomplished prior to entering power operation condition after every time the plant is placed in the cold shutdown condition for refueling, after each time the plant is placed in cold shutdown condition for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> if testing has not been accomplished in the preceding 9 months, and prior to returning the valve to service after maintenance, repair or replacement work is performed.
Semi-Annual (Unit at power or shutdown) if purge valves are operated during interva1(c)
Once per31 days Once per 92 days on a STAGGERED TEST BASIS Once per refueling cycle Once per shift Once per shift (a)
(b)
(c)
To satisfy ALARA requirements, leakage may be measured indirectly (as from the performance of pressure indicators) if accomplished in accordance with approved procedures and supported by computations showing that the method is capable of demonstrating valve compliance with the leakage criteria.
Minimum differential test pressure shall not be below 150 psid.
Refer to Section 4.4 for acceptance criteria.
See Specification 4.1.D.
14
TS 4.8-1 4.8 AUXILIARY FEEDWATER SYSTEM Applicability Applies to the periodic testing requirements of the Auxiliary Feedwater System.
Objective To verify the operability of the auxiliary feedwater pumps.
Specification A.
Tests and freguencjes
- 1.
At least once per 31 days:
- a.
Verify that the Auxiliary Feedwater System manual, power operated, and automatic valves in each flow path are in the correct position. This verification includes valves that are not locked, sealed, or otherwise secured in position, valves in the the cross-connect from the opposite unit and valves in the steam supply paths to the turbine driven auxiliary feedwater pump.
- 2.
At least once per 92 days:
- a.
Verify that each motor-operated valve in the auxiliary feedwater flow paths, including the cross-connect from the opposite unit, performs satisfactorily when tested in accordance with Specifications 4.0.5.
- 3.
At least once per 92 days on a STAGGERED TEST BASIS:
- a.
Verify that the auxiliary feedwater pumps perform satisfactorily when tested in accordance with Specification 4.0.5.
The provisions of Specification 4.0.4 are not applicable for the turbine driven pump.
Amendment Nos.
e e
TS 4.8-2 4a.
Within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> prior to Reactor Coolant System temperature and pressure exceeding 350°F and 450 psig, respectively, the motor driven auxiliary feedwater pumps shall be flow tested from the 110,000 gallon above ground Emergency Condensate Storage Tank to the steam generators.
4b.
Wthin 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> after achieving reactor criticality, the steam turbine driven auxiliary feedwater pump shall be flow tested from the 110,000 gallon above ground Emergency Condensate Storage Tank to the steam generators. The provisions of Specirfication 4.0.4 are not applicable.
- 5.
During periods of reactor shutdown with the opposite unit's Reactor Coolant System temperature and pressure greater than 350° F and 450 psig, respectively:
- a.
Continue to verify that the motor driven auxiliary feedwater pumps perform satisfactorily when tested at the frequency defined in Specification 4.8.A.3.
- b.
Verify that each motor-operated valve in the auxiliary feedwater cross-connect flow path for the opposite unit performs satisfactorily when tested in accordance with Specifications 4.0.5.
B.
Acceptance Criteria The pump and valve tests, except the system flow test, shall be considered satisfactory if they meet the ASME Section XI lnservice Testing Program acceptance criteria.
The system flow tests during unit startup from COLD SHUTDOWN or REFUELING SHUTDOWN shall be considered satisfactory if the control board indication demonstrates that flow paths exist to each steam generator.
Amendment Nos.
e TS 4.8-3 The correct alignment for manual, power operated, and automatic valves in the Auxiliary Feedwater System steam and water flow paths, including the cross-connect flow path, will provide assurance that the proper flow paths exist for system operation. This position check does not include: 1) valves that are locked, sealed or otherwise secured in position since they are verified to be in their correct position prior to locking, sealing or otherwise securing; 2) vent, drain or relief valves on those flow paths; and, 3) those valves that cannot be inadvertently misaligned such as check valves. This surveillance does not require any testing or valve manipulation. It involves verification that those valves capable of being mispositioned are in the correct position.
The auxiliary feedwater pump will be tested periodically in accordance with ASME Section XI to demonstrate operability. The pumps are flow tested on recirculation to the 110,000 gallon Emergency Condensate Storage Tank.
Valves in the flow path to the steam generators and cross-connect flow path are tested periodically in accordance with ASME Section XI.
The auxiliary feedwater pumps are capable of supplying feedwater to the opposite units steam generators. For a main steam line break or fire event in the Main Steam Valve House, one of the opposite units auxiliary feedwater pumps is required to supply feedwater to mitigate the consequences of those accidents.
Therefore, when considering a single failure, both motor driven auxiliary feedwater pumps are required to be OPERABLE* during shutdown to support the opposite unit if the Reactor Coolant System temperature or pressure of the opposite unit is greater than 350°F and 450 psig, respectively. Thus, to establish operability* the motor driven auxiliary feedwater pumps will continue to be tested quarterly on the same STAGGERED TEST BASIS when the unit is shutdown to support the opposite unit.
The turbine driven pump is not required to be OPERABLE when the unit is shutdown and therefore, is not tested during periods of shutdown.
- excluding automatic initiation instrumentation Amendment Nos.
J TS 4.8-4 The capacity of the Emergency Condensate Storage Tank and the flow rate of any one of the three auxiliary feedwater pumps in conjunction with the water inventory of the steam generators is capable of maintaining the plant in a safe condition and sufficient to cool the unit down.
Proper functioning of the steam turbine admission valve and the ability of the auxiliary feedwater pumps to start will demonstrate the integrity of the system.
Verification of correct operation can be made both from instrumentation within the Main Control Room and direct visual observation of the pumps.
References UFSAR Section 10.3.1 Main Steam System UFSAR Section 10.3.2 Auxiliary Steam System Amendment Nos.
Significant Hazards Consideration
Significant Hazards Considerations The NRG has completed a comprehensive examination of surveillance requirements in technical specifications that require testing at power.
The NRG staff found, as documented in NUREG-1366, "Improvements to Technical Specification Surveillance Requirements," dated December, 1992, that while the majority of testing at power is important, safety can be improved, equipment degradation decreased, and an unnecessary burden on personnel resources eliminated by reducing the amount of testing at power that is required by technical specifications.
The Auxiliary Feedwater System supplies water to the steam generators to remove decay heat from the Reactor Coolant System. To ensure operability of the Auxiliary Feedwater System, the pumps are currently flow tested for 15 minutes on a monthly basis as required by Technical Specifications. Consistent with Generic Letter 93-05, "Line-Item Technical Specifications Improvements to Reduce Surveillance Requirements for Testing During Power Operation," dated September 27, 1993 and NUREG-1366, we are requesting a change to the Auxiliary Feedwater System surveillance requirements for the pumps and valves. The valves will be tested quarterly and the pumps will be tested quarterly on a staggered test basis. In addition, the acceptance criteria enhancements invoking ASME Section XI criteria are requested.
The additional enhancements to the Auxiliary Feedwater surveillance requirements are based on NUREG-1431, "Standard Technical Specifications - Westinghouse Plants."
Virginia Electric and Power Company has reviewed the proposed changes against the criteria of 1 O CFR 50.92 and has concluded that the changes as proposed do not pose a significant hazards consideration. Specifically, operation of Surry Power Station in accordance with the proposed Technical Specifications changes will not
- 1. Involve a significant increase in the probability of occurrence or consequences of an accident previously evaluated.
Changing the surveillance test frequency of the Auxiliary Feedwater System pumps and valves does not significantly affect the probability of occurrence or consequences of any previously evaluated accidents. The probability of an Page 1 of 3
accident occurrence is not increased in itself by the proposed changes in surveillance testing of the Auxiliary Feedwater System pumps and valves.
auxiliary feedwater pump testing is performed through a full-flow test line, thereby not affecting normal plant operations. Changes to the testing therefore do not affect the probability of an accident occurrence. Redundant trains of the Auxiliary Feedwater System remain available during surveillance testing, therefore, the consequences of an accident are unchanged by the proposed changes in the Auxiliary Feedwater System surveillance test frequencies. Quarterly testing of the pumps and valves will continue to assure that the Auxiliary Feedwater System is capable of performing its intended functions for either unit if called upon. Consistent with Generic Letter 93-05, "Line-Item Technical Specifications Improvements to Reduce Surveillance Requirements for Testing During Power Operation," the new testing frequency should reduce Auxiliary Feedwater System unavailability resulting from failures and equipment degradation during testing, thereby resulting in improved system reliability. Invoking ASME Section XI as the acceptance criteria for testing the Auxiliary Feedwater Pumps is an enhancement to the acceptance criteria presently specified.
Furthermore, the operability requirements for the Auxiliary Feedwater System remain unchanged. Therefore, the probability or consequences of any previously analyzed accident are not increased by the proposed changes in surveillance requirements for the Auxiliary Feedwater System.
- 2. Create the possibility of a new or different kind of accident from any accident previously evaluated.
Changes in test frequency and acceptance criteria for the Auxiliary Feedwater System pumps and valves do not involve any physical modification of the plant or result in a change in a method of operation. Quarterly testing of the pumps and valves during both operation and shutdown will continue to assure that the Auxiliary Feedwater System will be capable of performing its intended function for either unit. Invoking ASME Section XI acceptance criteria for testing the Auxiliary Feedwater System pumps is an enhancement to the acceptance criteria presently specified. The operability requirements for the Auxiliary Feedwater System remain unchanged. Furthermore, new or different failure modes are not introduced by these changes in surveillance requirements. Therefore, a new or Page 2 of 3
-~,*,
different type of accident is not created by these proposed changes in surveillance requirements for the Auxiliary Feedwater System.
- 3. Involve a significant reduction in a margin of safety.
Changing the surveillance requirements of the Auxiliary Feedwater System pumps and valves does not affect any safety limits or limiting safety system settings. System operating parameters are unaffected. This reduced pump and valve testing frequency should reduce Auxiliary Feedwater System unavailability due to actual testing, as well as failures and equipment degradation during testing. Thus reduced testing results in an improved system reliability. Quarterly testing of the pumps and valves during operation and shutdown will continue to assure that the Auxiliary Feedwater System will be capable of performing its intended functions for either unit. Therefore, the reduction in surveillance testing requirements for the Auxiliary Feedwater System pumps and valves does not reduce any margin of safety.
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