ML20091N190

Proposed Tech Spec Providing Addl Clarification for Definition of Operable,Limiting Conditions for Operation & Surveillance Requirements

ML20091N190
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	06/05/1984
From:	VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML20091N143	List: ML20091N141 ML20091N190
References
NUDOCS 8406120219
Download: ML20091N190 (2)

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G. Instrument Functional Test - An instrument. M. Operatinz Cycle - Interval between the end of one functional test means the injection of a simulated refueling outage and-the end of~the next subsequent signal into the instrument primary sensor, to verify refueling outage.

.the proper instrument channel response, alarm, and/or initiating action. N. Primary Containment Integrity - Primary containment integrity means that the drywell and. pressure H. Lot System Functional Test - A loS i e system suppression chamber are intact and all'of the functional test means a test of all relays and following conditions are satisfied:

-contacts of a logic circuit from sensor to activated device to insure all components are operable per 1. All manual containment isolation valves on lines design intent. Where possible, action will go to . connecting to the reactor coolant system or ,

- completion,1.e. , pumps will be started and valves containment which are not required to be open opened. during accident conditions are closed.

I.- Minimum' Critical Power Ratio - The Minimum Critical 2. At least one door in each airlock is closed and Power Ratio is defined as the ratio of that power in sealed, a fuel assembly which is calculated to cause some i point in that assembly to experience boiling 3. All automatic containment isolation valves are transition as calculated by application of the GEIL operable or deactivated in the isolated position, correlation to the actual assembly operating power.

(Reference EEDO-10958) 4. All blind flanges and manways are closed.

J. -Mode - The reactor mode is that which is established O. Protective Instrumentation Definitions by the mode-selector-switch.

1. Instrument channel - An instrument channel means K. Operable - A system, subsystem, train, component or an arrangement of a sensor and auxiliary device shall be OPERABLE or have OPERABILITY when it equipment required to generate and transmit to a is capable of performing its specified function (s). trip system a single trip signal related to the Implicit in this definition shall be the assumption plant parameter monitored by that instrument that all necessary attendant instrumentation, channel, controls, electrical power, cooling or seal water, lubrication or other auxiliary equipment that are 2. Trio System - A trip system means an arrangement -

required for the system, subsystem, train, component of instrument channel trip signals and auxiliary or device to perform its function (s) are also equipment required to initiate action to capable of' performing their related support accomplish a protective trip function. A trip function (s), system may require one or more instrument channel trip signals related to one or more L. Operating,- Operating means that a. system or plant parameters in order to initiate trip component is performing its intended functions in system action. Initiation of protective action its required manner, may require the tripping of a single trip system 8406120219 840605 PDR ADOCK 05000271 Amendment No 52, 70 P PDR 2

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3.7 LIMITING CONDITIONS FOR OPERATION 4.7 SURVEILLANCE REQUIREMENTS i

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1. Except as specified in Specification 3.7.B.3 a. Pressure drop across the combined HEPA and below, both circuits of the Standby Gas Treatment charcoal filter banks is less than 6 inches System shall be operable at all times when of water at 1500 cfm t 10%.

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secondary containment integrity is required.

b. Inlet heater input is at least 9 kW.

2. a. The results.of the in-place cold DOP and

'halogenated hydrocarbon tests at design flows 2. a. The tests and sample analysis of on HEPA and charcoal filter banks shall show Specification 3.7.B.2 shall be performed

>99% DOP removal and >99% halogenated initially and at least once per operating hydrocarbon removal. cycle not to exceed 18 months, and following painting, fire, or chemical release in any

b. The results of laboratory carbon sample ventilation zone communicating with the analysis shall show >95% radioactive methyl- system, while the system is operating, that iodide removal. (1300 C, 95% R.H.) could contaminate the HEPA filters or charcoal adsorbers.

c. System fans shall be shown to operate within i 10% of design flow. b. Cold DOP testing shall be performed after each complete or partial replacement of the

3. From and after the date that one circuit of the HEPA filter bank.

Standby Gas Treatment System is made or found to be inoperable for any reason, reactor operation is c. Halogenated hydrocarbon testing shall be permissible only during the succeeding seven days performed after each complete or partial unless such circuit is sooner made operable, replacement of the charcoal filter bank.

Provided that during such seven days all active components of the other standby gas treatment In addition, the sample analysis of circuit shall be operable. Specification 3.7.B.2.b and the halogenated hydrocarbon test shall be performed atter every 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of system operation.

d. Each circuit shall be operated with the heaters on at least 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> every month,

e. An ultrasonic leak test shall be performed on the gaskets sealing the housing panels downstream of the HEPA filters and adsorbers at least once per operating cycle not to exceed 18 months. If the ultrasonic test indicates the presence of a leak, the condition will be evaluated and the gasket repaired or replaced, as necessary.

Amendment No. 49 130

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