ML20209D365
| ML20209D365 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 07/08/1999 |
| From: | WOLF CREEK NUCLEAR OPERATING CORP. |
| To: | |
| Shared Package | |
| ML20209D361 | List: |
| References | |
| NUDOCS 9907130117 | |
| Download: ML20209D365 (6) | |
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Attachment IV to ET 99-0029 Page 1 of 2 V
ATTACHMENT IV PROPOSED TECHNICAL SPECIFICATION CHANGES CURRENT TECHNICAL SPECIFICATIONS
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Attachment V to ET 99-0029 Page 1 of 3 ATTACHMENT V PROPOSED TECHNICAL SPECIFICATION CHANGES IMPROVED TECHNICAL SPECIFICATIONS
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. Attachment V to ET 99-0029 LOP DG Strrt instrum:ntation Page 2 of 3 3.3.5 I
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SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY l
SR 3.3.5.1 Not Used.
SR 3.3.5.2 NOTE-Verification of time delays is not required.
Perform TADOT.
31 days b_'*W 4
SR 3.3.5.3 Perform CHANNEL CALIBRATION with Trip Setpoint 18 months and Allowable Value as follows:
Loss of voltage Allowable Value 2M 120V a.
bus with a time delay of 1.0 + 0.2, -0.5 sec.
s Loss of voltage Trip Setpoint 2 83V,120V bus with a time delay of 1.0 sec.
b.
Degraded voltage Allowable Value 2 120V bus with a timo delay of 119 i 116 sec.
+
raded voltage Trip Setpoint 2106.9V,120V bus with a time delay of 119 sec.
SR 3.3.5.4 Verify LOP DG Start ESF RESPONSE TIMES are 18 months on a within limits.
STAGGERED TEST BASIS Wolf Creek - Unit 1 3.3-45 Amendment No.123
.': Attachment V to ET 99-0029 LOP DG Stirt Instrumsntition Pag.e'3 of, 3 B 3.3.5
, BASES BACKGROUND RCP. There are '!our of these 8-second timers per bus, one for each
_ (continued) degraded voltage channel. The bistable' outputs are then combined in a two-out-of-four_ logic to generate a degraded voltage signal if the voltage is below approximately 90%. Once the two-out-of four logic is satisfied, contacts in the bus feeder breaker trip circuits closed to arm the tripping circuitry. If a safety injection signal (SIS) were to occur concurrently with or after the arming of the tripping circuitry, the bus feeder breaker would open immediately, a bus undervoltage would be sensed, and a LOP i
signal would be generated. Should the degraded voltage condition occur in a non-accident condition (no SIS present), an additional 111 second time delay is provided. These time delays are specific to the feeder breakers (2 per bus). If the degraded voltage is not alleviated in the overall 119 seconds (nominal delay), the bus feeder breaker is tripped.
OPERABILITY of LSELS is addressed in LCO 3.8.1, "AC Sources -
Operating," And LCO 3.8.2, "AC Sources - Shutdown."
Trip Setpoints and Allowable Values The Trip Setpoints used in the relays are based on References 1 and 2.
The selection of these Trip Setpoints is such that adequate protection is provided '.vhen all sensor and processing time delays are taken into account.
The actual nominal Trip Setpoint entered into the relays is normally still more conservative than that required by the Allowable Value. If the measured setpoint does 'iot exceed the Allowable Value, the relay is considered OPERABLE.
Setpoints adjusted in accordance with the Allowable Value ensure that the consequences of accidents will be acceptable, provided the unit is operated from within the LCOs at the onset of the accident and that the equipment functions as designed. _ _
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Allowable Values and/or Trip Setpoints are specifiexf for each Function in SR 3.3.5.3. Nominal Trip Setpoints are also specified in the unit specific setpoint calculations. The nominal setpoints are selected to ensure that the setpoint measured by the surveillance procedure does not exceed the Allowable Value if the relay is performing as required.- If the measured
- setpoint does not exceed the Allowable Value, the relay is considered OPERABLE. Operation.with a Trip Setpoint less conservative than the nominal Trip Se point, but within the Allowable Value, is acceptable provided that operation and testing is consistent with the assumptions of the setpcint calculation. Each Allowable Value and/or Trip Setpoint Wolf Creek - Unit 1-B 3.3.5-2 Revision 0
I Attachment VI to ET 99-0029 Page 1 of 1 a
LIST OF COMMITMENTS The following table identifies those actions committed to by Wolf Creek Nuclear Operating Corporation (WCNOC) in this document.
Any other statements in this submittal are provided for information purposes and are not considered to be commitments.
Please direct questions regarding these commitments to Mr.
Michael J.
Angus, Manager Licensing and Corrective Action at Wolf Creek Generating Station, (316) 364-4077.
COMMITMZNT Due Date/ Event This proposed revision to the WCGS current Technical Within 60 days Specifications will be fully implemented within 60 of NRC days of formal NRC approval.
approval.
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