ML20077S703
| ML20077S703 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 09/16/1983 |
| From: | VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| Shared Package | |
| ML20077S697 | List: |
| References | |
| NUDOCS 8309220183 | |
| Download: ML20077S703 (11) | |
Text
-.
t PLANT SYSTEMS
'3/4.7.4 SERVICE WATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7.4.1 At least two service water loops (shared with Unit 2) shall be OPERABLE.
APPLICABILITY: MODES 1, 2, 3 and 4.
ACTION:
With only one service water loop OPERABLE, restore at least two loops to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILLANCE REQUIREMENTS 4.7.4.1 At least two service water loops shall be demonstrated OPERABLE:
At least once per 31 days by verifying that each valve (manual, power a.
operated or automatic) servicing safety related equipment that is not locked, sealed, or otherwise secured in position, is in its correct position.
b.
At least once per. 6 months by measurement of the movement of the pumphouse and wing walls.
c.
At least once per 18 months during shutdown, by:
I 1.
Verifying that each automatic valve servicing safety related equipment actuates to its correct position on a safety injection signal.
2.
Verifying that each containment isolation valve actuates to its correct position on a containment high-high signal.
i 8309220103 830916 PDR ADOCK 05000338 P
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PLANT SYSTEMS 3/4.7.12 SETTLEMENT OF CLASS 1 STRUCTURES LIMITING CONDITION FOR OPERATION
- 3.7.12.1 The total settlement of each Class 1 structure or the differential settlement between Class 1 structures shall not exceed the allowable values of Table 3.7-5.
APPLICABILITY: ALL MODES ACTION:
A.
With either the total settlement of any structure or the differential settlement of any structu es exceeding 75 percent of the allowable settlement, conduct an engineering review of field conditions and evaluate the consequences of additional settlement.
Submit a special report to the Consnission pursuant to Specification 6.9.2 within 60 days,.containing the results of the investigation, the evaluation of existing and possible continued settlement and the remedial action to be taken if any, including the date of the next survey.
I b.
With the total settlement of any structure or the differential settlement of any two structures exceeding the allowable settlement j
value of Table 3.7-5, be in at least HCT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and i
COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILLANCE REQUIREMENTS 4.7.12.1' The total settlement of each class I structure or the differential settlement between Class-1 structures listed in' Table 3.7-5 shall be 4
determined to the nearest 0.01 foot by measurement and calculation at least once per 6 months.
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ALLOWABLE TOTAL SETTLEMENT.OR DIFFERENTIAL SETTLEMENT FOR CLASS 1 STRUCTURES ALLOWABLE ALLOWABLE 8
TOTAL DIFFERENTIAL gy SETTLEMENT SETTLEMENT SETTLEMENT
- SETTLEMENT
- l POINT STRUCTURE POINT STRUCTURE / COMPONENT (FEET)
(FEET)
I 15, 16, 17, North Side of Expansion Joint 0.22 from 8/78 N/A 18 Service Water Piping at SWPH 228 Decontamination Building 250 Pipe Tunnel N/A 0.06 226 Fuel Building 251 Waste Gas Decay N/A 0.06 Tank Enclosure 8
Service Water Pump House H-569,H-584 Pipe Hanger in N/A 0.17 Reservoir R*
114 Service Building (E-17) 0.09 N/A Yy 141 Safeguards Area - Unit 1 253 Unit 1 - Casing N/A
,0.12 from 2/
Cooling Bldg.
158
- Turbine Building (B-9 1/2) 0.06 N/A 0.03 N/A 245, 246 Fuel Oil Pump House 206, 207, Boron Recovery Tank Dike 0.03 N/A 208, 209 204 Circulating Water Intake 0.15 N/A Structure
- Unless otherwise indicated, allowable settlements are from baseline elevations established in May 1976 or reference elevations corrected to the May 1976 survey.
- Critical differential settlement is downward movement of Point 117 with respect to Point 113.
- Not Class 1 structure, but settlements affects Class 1 pipeline.
r-PLANT SYSTEMS 3/4.7.13 GROUNDWATER LEVEL-SERVICE WATER RESERVOIR LIMITING CONDITION FOR OPERATION 3.7.13 The groundwater level of the service water reservoir shall not exceed the elevation at the locations listed in Table 3.7-6.
The flow of groundwater from the drains beneath the pumphouse shall not exceed the values given in Table 3.7-6.
APPLICABILITY: ALL MODES ACTION:
With the groundwater level of the service water reservoir or the groundwater flow rate exceeding any of the limits of. Table 3.7-6, an engineering evaluation shall be performed by a Licensed Civil Engineer to determine the cause of the high ground water or flow rates and the influence on the stability of the service water reservoir and pumphouse.
A Special Report shall be prepared and submitted to the Commission pursuant to Specification 6.9.2 within 90 days, containing the results of the evaluation and any corrective action determined to be necessary.
SURVEILLANCE REQUIRFJfENTS 4.7.13.1 The groundwater level within the dike of the service water reservoir
.as determined by monitoring the piezometers shall be within limits presented in Table 3.7-6.
Measurements shall be performed at least once per 6 months.
The groundwater flow rate shall be determined by measurements at the drain outlet gallery.
Flow rate measurements shall be taken at the same frequency as the.pierometers (that is once per every 6 months). and the flow rate shall not exceed that established in Table 3.7-6.
A visual inspection of the clarity of the outflow from each drain shall be performed in conjunction with the flow monitoring effort.
m NORTH ANNA - UNIT 1 3/4 7-73 i
5 TABLE 3.7-6 g
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ALLOWABLE GROUNDWATER LEVELS SERVICE WATER RESERVOIR PIEZOMETER PIEZOMETER ALLOWABLE GROUNDWATER ELEVATION h
NO.
LOCATION MEAN SEA LEVEL (FEET) e 10 SE, toe 277 SWPH, (Units 1 & 2) crest 280 11 12 SWPH, (Units 1 & 2) toe
'285 13 SWPH, (Units 1 & 2) crest 280 14 SWPH, (Units 1 & 2) crest 280 mN 15 SE, crest 280 y
16 SE, crest 280 17 SE, crest 280 18 SWPH (Units 3 & 4) 295 ALLOWABLE DRAIN FLOW RATE DRAIN OUTLETS LOCATION (gallons per minute)
I through 6 Drainage Gallery FLO'4 RATE SHALL NOT EXCEED 8.5 GALLONS PER MINUTE (gpa).
PLANT SYSTEMS 3/4.7.4 SERVICE WATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7.4.1 At least two service water loops (shared with Unit 1) shall be OPERABLE.
APPLICABILITY: MODES 1, 2, 3 and 4.
ACTION:
With only one service water loop OPERABLE, restore at least two loops to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILLANCE REQUIREMENTS 4.7.4.1 At least two service water loops shall be den:onstr ted OPERABLE:
a.
At least once per 31 days by verifying that each valve (manual, power operated or automatic) servicing safety related equipment that is not locked, sealed, or otherwise secured in position, is in its correct position.
b.
At least once per 6 months by measurement of the movement of the pumphouse and wing walls, c.
At least once per 18 months during shutdown, by:
1.
Verifying that each automatic valve servicing safety l
related equipment actuates to its correct position on a safety injection signal.
2.
Verifying that each containment isolation valve
-actuates to its correct position on a containment high-high signal.
l l
NORTH ANNA - UNIT 2 3/4 7-15 i
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PLANT SYSTEMS 3/4.7.12 SETTLEMENT OF CLASS 1 STRUCTURES LIMITING CONDITION FOR OPERATION 3.7.12.1 The total settlement of each Class I structure or the differential settlement between Class I structures shall not exceed the allowable values of Table 3.7-5.
APPLICABILITY: ALL MODE'-
ACTION:
A.
With either the total settlement of any structure or the differential settlement of any structures exceeding 75 percent of the allowable settlement, conduct an engineering review of field conditiens and evaluate the consequences of additional settlement. Submit a special report to the Commission pursuant to Specification 6.9.2 within 60 days, containing the results of the investigation, the evaluation of existing and possible continued settlement and the remedial action to be taken if any, including the date of the next survey.
b.
With the total settlement of any structure or the differential settlement of any two structures exceeding the allowable settlement value of Table 3.7-5, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILLANCE REQUIREMENTS 4.7.12.1 The total settlement of each Class I structure or the differential settlement between Class,1 structures listed in' Table 3.7-5 shall be determined to the nearest 0.01 foot by measurement and calculation at least once per 6 months.
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- Unless otherwise indicated, allowable settlements are from baseline elevations established in May 1976 or g
reference, elevations corrected to the'May 1976 survey.
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- Critical differential settlement is downward movement of Point 117 with respect to Point 113.
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- Not Class I structure, but settlements affects Class 1 pipeline.
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3/4.7.13 GROUNDWATER LEVEL-SERVICE WATER RESERVOIR LIMITING CONDITION FOR OPERATION
-r 3.7.13 The groundwater level of the service water reservoir (common to Units I and 2)shall not exceed the elevation at the locations listed in Table 3.7-6.
The flow of groundwater from the drains beneath the pumphouse shall not exceed the values given in Table 3.7-6.
APPLICABILITY: ALL MODES
'A T10N:
i With' the groundwater level of the service water reservoir or the groundwater
~ flow rate exceeding any of -the limits of Table 3.7-6, an engineering o
P evaluation shall be performed by a Licensed Civil Engineer to determine the cause of the high ground water or flow rates and the influence on the stability of the service water reservoir and pumphouse.
A Special Report shall be prepared and submitted to the Commission pursuant to Specification 6.9.2 within 90 days, containing the results of the evaluation and any corrective action determined to be necessary.
SURVEILLANCE REQUIREMENTS 4.7.13.1 The groundwater level within the dike of the service water reservoir
-as determined by monitoring the piezometers shall be within limits presented in Tab'e 3.7-6.
Measurements shall be performed at least once per 6 months.
The ' groundwater flow rate shall be determined by measurements at the drain outlet gallery.
Flow rate measurenants shall be taken at the same frequency as the.pierometers (that is once per every 6 months) and the flow rate shall not exceed-- that established in Table 3.7-6.
A visual inspection of the clarity of the outflow.from each drain shall be performed in conjunction with the flow monitoring effort.
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ALLOWABLE GROUNDWATER LEVELS SERVICE WATER RESERVOIR g
E PIEZOMETER PIEZOMETER ALLOWABLE GROUNDWATER ELEVATION E
NO.
LOCATION MEAN SEA LEVEL (FEET) e w
10 SE, toe 277 SWPH, (Units 1 & 2) crest 280 11 12 SWPH, (Units 1 & 2) toe 285 13 SWPH, (Units 1 & 2) crest 280 14 SWPH, (Units 1 & 2) crest 280 w3 15 SE, crest 280 u
h 16 SE, crest 280 17 SE, crest 280 18 SWPH (Units 3 & 4) 295 ALLOWABLE DRAIN FLOW RATE DRAIN OUTLETS LOCATION *
(gallons per minute)
I through 6 Drainage Gallery FLOW RATE SHALL NOT EXCEED 8.5 GALLONS PER MINUTE (gpm).
c DISCUSSION OF PROPOSED TECHNICAL SPECIFICATION CHANGES The requested change in Technical Specification 3/4.7.4 (Service Water System) will terminate the requirement to measure the turbidity and suspended solids in the outflow from the drain system under the service water pumphouse. This is consistent with the conclusions presented in " Report on Monitoring of Settlement and Groundwater Level at Service Water Reservoir, North Anna Power Station, Units 1 and 2" submitted by Vepco to NRC in February, 1983.
The requested change will not increase the probability of occurrence or consequence of an accident previously evaluated.
The possibility for an accident or malfunction of a different type than any evaluated previously in the UFSAR will not be created and the margin of safety as defined in the Technical Specifications will not be reduced as a visual inspection of the outflow will be conducted as part of implementation of Technical Specification 3/4.7.13.
This propcsed change does not pose a significant hazards consideration because no detectable turbidity or suspended solids were indicated in laboratory tests, with the exception of the first few days after installation of each drain.
The requested changes to Technical Specification 3/4.7.12 (Settlement of Class I Structures) will decrease the frequency of settlement monitoring to once per 6 months.
This is consistent with the conclusion presented in " Report on Monitoring of Settlement and Groundwater Level at Service Water Reservoir, North Anna Power Station, Units 1 and 2",
submitted by Vepco to NRC on February, 1983.
The requested changes will not increase the probability of occurrence or consequence of an accident previously evaluated.
The possibility for an accident or malfuntion of a different type than any evaluated previously in the UFSAR will not be created and the margin of safety as defined in the Technical Specification will not be reduced by decreasing the frequency of settlement monitoring as a more uniform comprehensive monitoring program will result.
This proposed change does not pose a
significant hazards consideration because settlement monitoring will continue to be conducted at least once per 6 months.
The requested enange in Technical Specification 3/4.7.13 (Groundwater Level -
Service Water Reservoir) will decrease the frequency of monitoring of the piezometers. This is consistent with the conclusions presented in " Report on Monitoring of Settlement and Groundwater Level at Service Water Reservoir, North Anna Power Station, Units 1 and 2"
submitted by Vepco to NRC in February, 1983.
The requested ' changes will not increase the probability of occurrence or consequence of an accident previously evaluated.
The possibility of an accident or malfunction of a different type than any evaluated previously in the UFSAR will not be created and the margin of safety as defined in the Technical Specification will not be reduced.
Decreasing the frequency of monitoring to once per 6 months would provide a more uniform comprehensive monitoring program.
A visual inspection of the clarity of the outflow from each drain will also be added as a part of this Technical Specification. This proposed change does not pose a significant hazards consideration because the frequency of monitoring groundwater levels at least once per 6 months will provide a more uniform comprehensive monitoring program.
Removing a portion of the ACTION statement does not pose a significant hazards consideration because the 5 year surveillance period is complete and a report has been submitted to the Commission in February, 1983.