ML19316A732
| ML19316A732 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 05/20/1980 |
| From: | Maine Yankee |
| To: | |
| Shared Package | |
| ML19316A731 | List: |
| References | |
| NUDOCS 8005270422 | |
| Download: ML19316A732 (4) | |
Text
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g ENGINEERED SAFEGUARDS SYSTEMS (Continued)
Subsystem (Continued) safeguards manual and automatic initiation.
Degree of Redundancy The difference between the number of operable channels and the number of anannels which when tripped will cause an automatic system trip.
INSTRUMENTATION SURVEILLANCE Channel Check A qualitative determintion of acceptable operability by observation of channel behavior during normal plant operation. This determination shall, where feasible, include comparison of the channel with other independent channels measuring the same variable.
Channel Functional Test Injection of a simulated signal into the channel to verify that it is operable, including any alarm and/or trip initiating action.
Channel Calibration / Channel Adjustment Adjustment of channel output such that it responds, with acceptable range and accuracy, to known values of the parameter which the channel Calibration shall encompass the entire channel, including measu res.
equipment action, alarm, interlocks or trip and shall it;1ude the channel functional test.
MISCELLANEOUS DEFINITIONS Operable A system, subsystem, train, component or device shall be OPERABLE or have OPERABILITY when it is capable of performing its specified functions (s).
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MISCELLANEOUS DEFINITIONS (Continued)
Operable (Continued)
Implicit in this definition shall be the assumption that all necessary attendant instrumentation, controls, normal and emergency electrical power sources, cooling or seal water, lubrication or other auxiliary equipment that are required for the system, subsystem, train, component or device to perform its function (s) are also capable of performing their related support function (s).
Operating A system or component is operating if it is performing its safeguard or operating functions.
Control Rods All full-length shutdown and regulating control elements assemblies (CEA).
Partial-Length Control Element Assemblies Control element assemblies (CEA) that contain neutron absorbing material only in the lower quarter of their length.
Containment Integrity Containment integrity is defined to exist when all of the following are true:
a.
All non-automatic containment isolation valves and blind flanges are closed.
b.
The equipment hatch is properly closed and sealed.
c.
At least one hatch in the personnel air lock is prcperly closed and sealed.
d.
All automatic centainment isolation valves are operable or are locked closed.
e.
The uncontrolled containment leakage satisfies Specification 4.4 Section I.B.3 5
g MISCELLANEOUS DEFINITIONS (Continued)
Reportable Occurrence A reportable occurrence is defined in Section 5 3 of these specifications.
Radio Isotope Release Limits The Maine Yankee radio isotope release limits are as defined in Technical Specification 316, paragraph A, item 2, for liquid releases and Technical Specification 3.17, paragraph A, item 2 for gaseous releases.
FREQUENCY NOTATION The frequency notation specified for the performance of Surveillance Requirements shall correspond to the intervals defined in Table 0.1.
Fire Suppression Water System A fire suppression water system shall consist of:
A water source (s);
gravity tank (s) or pump (s); and distribution piping with associated sectionalizing control or isolation valves. Such valves shall include yard hydrant curb valves, and the first valve ahead of the water flow alarm device on each sprinkler, hose standpipe or spray system riser.
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LIMITING CONDITIONS FOR OPERATION r5
~ When a system, subsystem, train, component or device is determined to be inoperable solely because its emergency power source is inoperable, or solely because its normal power source is inoperable, it may be considered OPERABLE for the purpose of satisfying the requirements of its applicable Limiting Condition for Operation, provided:
(1) its corresponding normal or emergency power source is OPERABLE; and (2) all of its redundant system (s), subsystem (s), train (s), component (s) and device (s) are OPERABLE, or likewise satisfy the requirements of this specification. Unless both conditions (1) and (2) are satisfied, the unit shall commence a continuous controlled shutdown at a rate equal to or greater than 15 percent per hour and be in the Cold Shutdown Condition within 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. This specification is not applicable in the Cold Shutdown or Refueling Shutdown Condition.
This requirement delineates what additional conditions must be satisfied to permit operation to continue. It specifically prohibits operation when one train is inoperable because its normal or emergency power source is inoperable and a system, subsystem, component or device in the other train is inoperable for another reason.
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