Term
Pri Con
Describe the designed pressures, temperatures, and leakage. |
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Definition
-Internal pressure of 56psig.
-External pressure of 2 psig.
-Temperature of 281 d-F.
-Leakage of 1.2% by weight & .5% by volume in 24 hours. |
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Term
Pri Con
Discuss atmoshpere inerting. |
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Definition
| During power operation the drywell and TORUS inerted to <4% oxygen using nitrogen gas. |
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Term
Pri Con
Describe the torus-to-drywell vacuum breakers. |
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Definition
-8, 18" check valves.
-Air operation for testing.
-Full open at .5psid. |
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Term
Pri Con
Describe the torus water temp limits. |
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Definition
-Normal limit is < or equal to 90F and > or equal to 65F.
-Allowed up to 99F for testing but cannot be > 90F >24 hours after testing.
->120F must depress <200psig w/in 12 hours. |
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Term
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Definition
-2 divisions.
-8 RTDs.
-Powered by Y-70 and Y-80. |
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Term
Pri Con
Describe drywell atmospheric cooling. |
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Definition
-4 fans in drywell with 16 dampers.
-Cooled by RBCCW.
-Maintain <135F for normal equipment ops.
-Designed to lower air temp <105F w/in 8-10 minutes post shutdown. |
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Term
Pri Con
Describe the TORUS size basis. |
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Definition
-Designed to absorb energy from DBA-LOCA without exceeding 170F.
-Assumes minimum level and max temp of 125F. |
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