ML18029A834
| ML18029A834 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 08/28/1985 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML18029A833 | List: |
| References | |
| TVA-BFNP-TS-212, NUDOCS 8509060072 | |
| Download: ML18029A834 (15) | |
Text
ENCLOSURE 1
PROPOSED TECHNICAL SPECIFICATION REVISIONS BROMNS.FERRY NUCLEAR PLANT UNITS 1, 2, AND 3 (TVA BFNP TS 212)
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PROPOSED CHANGES UNIT 1
TABLE 4.2.B (Continued) function lnstrunent Channel
?IPCI Turbine Stean Line Htjth Flou functional Test Cal !bra c ion once/3 +oaths r
Iastruneat Chaclc noae lnstrunent Channel llPCI Stean Line Space High Teaperature Core Spray System Logic kCIC Systea (loitiating) Logic RCIC Syatea (!aolacioa) Logic once/ operating cycle once/ operating cyc) e once/ operating cycle once/)
aoncha
- I/A nona N/A N/A H/A RPCI Syatea (Initiating) Logic HPCI System (Isolation) Logic ADS Logic K?CI (Iaitiatiag) Logic once/ operating cycle once/ operating once/ operatinR cycle (6) cycle once/ operating cycle (c) 8/A
?l/A
?I/A H/A lJCI (Cones!~at Spray) Logic once/ operating cycle Core Spray Spatula Auto Iaitfatioa Inhibit (Core'Spray Auto Inittacioa) once/ operating cycle N/A 5/A LtCI Auto taiciatioa tahibfc (L?CI Auto Inicfatioa)
W/A N/A
PROPOSED CHANGES UNIT 2
TASLK 4.2.g (Continued)
Function Instrment Channel
)PCI Turbine Stean Line High Plo<
Functional Test Cafibratfon once/3 mntho Inotnsmcnt CheA Instrunent Channel BPCI Stean Line Space High Tenperature Core Spray System Logic RCIC Syotea (lnitfating) Logic tCIC Syoten (Isolation) Logic QFCI Systea (Initio'ting) Logic HFCI Syoten (Isolation) Logic ADS Logic LPCI (Initfatfng) Logic once/ operating cycle once/ operating cycle once/ operating cycle P
once/ operating cycle once/ operating cycle once/ operating cycle once/ operating cycle once/3 conths (6)
'.)/A (6)
(6)
(6)
(6)
(C) nona
.')/A N/A H/A
. ))IA
))/A LPCI (Contaf~nt Spray)
Logic once/ operating cycle (6)
H/A Core Spray Syoten Auto Inftiation Inbfbft (Core Spray Auto once/ operating cycle
))/A
))/A LKI Auto Inftfotfon inhibit (LPCI Auto Inftfntfon) once/ operating cycle (7)
I)/h
PROPOSED CHANGES UNIT 3
TABLE 4 ~ 2.B SURVEILLANCE REQUIRENENZS jOR INSTR(S(ENTATION THAT INITIATE OR CONTROL THE CSCS Function Instrument Channel Suppression Chamber High Level Instrument Channel Reactor High Mater Level Instnurmnt Channel RCIC Turbine Steam Line High Plcw Instrument Channel RCIC Steam Line Space High Teuperature Instrument Channel HPCI Turbine Steam Line High Plov Instrument Channel HPCI Steam Line Space High Temperature Core Spray System Logic g
RCIC System (Initiating) Logic RCIC System (Isolation) Logic HPCI System (Initiating) Logic HPCI System (Isolation) Logic ADS Logic LPCI (Initiating) Logic Functional Test once I, onerg tH ne once/ operating once/ operating once/ operating rye ]e cycle cycle cycle once/ operating cycle once/ operating cycle once/ operating cycle Calibration once/3 months once/3 months once/3 months once/3 months once/3 months once/3 months (6)
N/A (6)
(6)
(6)
(6)
(6)
Instrume t Check none once/day none none none none N/A N/A N/A
TABLE 4 ~ 2 8 SURVEILLANCE REQUIREMENTS FOR INSTRUNENTA Iotas THAT INITIATE OR CONTROL THE CSCS Function Functional Test Calibration Instrument Check LFCI (Containment Spray)
Logic Once/ Operating Cycle (6)
Core Spray Loop A Discharge Pressure (PI-75-20)
Core Spray Loop B Discharge Pressure (PI-75-48)
RHR Loop A Discharge Pressure (PI-74-5l)
RHR Loop B Discharge Pressu e
(PI-74-65)
Instrument Channel-RHR Start Instrument Channel-cn Thermostat (RHR Area Cooler Fan)
Instrument Channel-Core Spray A or C Start Instrument Channel Core Spray B or D start N/A N/A N/A N/A Tested during functional test of RHR pump (refer to section 4.5.B).
once/month Tested during functional test-of core spray (refer to section
- 4. 5.A).
Tested during functional test of oore spray (refer once/6 months once/6 months once/6 months once/6 months N/A ance/6 months N/A N/A once/day once/day once/day once/day N/A N/A N/A N/A
ENCLOSURE 2 DESCRIPTION, JUSTIFICATION, AND SAFETY ANALYSIS BROWNS FERRY NUCLEAR PLANT UNITS 1, 2, AND 3 D~escei ton Page 99 for units 1 and 2
Pages 95 and 96 for unit 3 The proposed amendment would revise the following functional test frequencies listed in table 4.2.B from "once/6 months" to "once/operating cycle":
Core Srapy logic, RCIC (Initiating and Isolation) logic, HPCI (Initiating and isolation) logic, ADS logic, LPCI (Initiating and Containment Spray) logic, Core Spray Auto Initiation Inhibit, and HPCI Auto Initiation Inhibit.
Justification Because of test complexity, number of temporary alterations and administrative
- controls, these tests are inherently prone to mistakes.
These proposed technical specification revisions will allow performance of these complex logic surveillance tests during unit shutdown.
Safet Anal sis Conducting ECCS and RCIC logic surveillances only during shutdown conditions will reduce the risk of inadvertently discharging reactor coolant and/or over pressurizing low-pressure emergency core cooling systems.
These tests are inherently prone to mistakes because of test complexity, number of temporary alterations and administrative controls.
NUREG-0123, Revision 3, BWR Standard Technical Specifications (STS) 4.5.1c and 4.5.1d specify that system functional tests which include simulated automatic actuation of the system should be performed "at least once per 18 months."
Browns Ferry units 1, 2, and 3 are currently on a schedule of 18-month operating cycles.
A surveillance frequency of "once/operating cycle" is consistent with the BWR STS and also will accommodate an operating cycle which might be shorter or longer than 18 months.
ENCLOSURE 3 Determination of No Significant Hazar ds Consider ation Browns Ferry Nuclear Plant Units 1, 2, and 3
Description of Amendment Request:
The amendment would revise the following funct;onal test frequencies listed in Table 0.2.B to "once/operating cycle":
Core Spray logic, RCIC (Initiating and Isolation) logic, HPCI (Initiating and isolation) logic, ADS logic, LPCI (Initiating and Containment Spray) logic, Core Spray Auto Initiation Inhibit, and LPCI Auto Initiation Inhibit.
Basis for Proposed'o Significant Hazards Consideration Determination:
The Commission has provided guidance for the application of criteria for no significant hazards consideration determination by providing examples of amendments that are considered not likely to involve significant hazards considerations (48 FR 14870).
These examples include: "(vi) - A change which either may result in some increase to the probability or consequences of a previously analyzed accident or reduce in some way a safety margin, but where the results of the change are clearly within all acceptable criteria with respect to the system or component specified in the Standard Review Plan (SRP):
For example, a change resulting from the application of a small refinement of a previously-used calculational model or design method."
The proposed amendment is encompassed by this example in that the revision reflects the requirements established in the Standard Technical Specifications (NURE0-0123, Revision 3). as endorsed by Chapter 16 of the Standard Review Plan.
Therefore, TVA proposes to determine that the proposed amendment does not involve a significant hazards consideration.
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