Term
| What are the ESF systems? |
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Definition
- Containment Structure
- Containment Heat Removal Systems
- ECCS (CHS,SI,SI Acc, RHR pumps)
- AFW
- SLCRS
- Contaiment isolation system
- Containment depressurization
- Hydrogen Recombiner
- SLCRS
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Term
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Definition
- Fuel Clad
- RCS pressure boundary
- Containment
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Term
| What is the purpose of ESF? |
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Definition
- Mitigate the consequence of postulated events such as a LOCA
- Protect the public by preventing or minimizing the release of fission products
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Term
| What is the ECCS acceptance criteria? |
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Definition
- Peak clad temp <2200F
- Cladding oxidation <17%
- H2 generation <1%
- Coolable geometry
- Long term cooling
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Term
| Define the exclusion zone |
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Definition
- Area surrounding the reactor
- Licensee has authority to determine all activities, including removal of personnel and property
- Areas may be traversed by highways and railroads and waterways
- Residence is normally prohibited
- Max dose 25 REM/First 2 hours of event
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Term
| Define the low population zone |
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Definition
- Surrounds exclusion area
- Contains residence -no specific number-reasonable probability of taking protective measures on their behalf
- Max dose: 25 Rem/duration of event
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Term
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Definition
- Distance from the reactor to nearest boundary containing more than 25,000 residents
- Total 1.33 time distance from the reactor to outer boundary of Exclusion area.
- New London is our closest population center
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Term
| Define Safe Shutdown Earthquake (SSE) |
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Definition
- the hypothetical earthquake whose severity is based upon an evaluation of the maximum earthquake potential for the site area.
- Commonly called "Design basis Earthquake"
- Value = .17 g horizontal acceleration
- Seismic Cat 1 structures and systems are designed to remain functional during a SSE
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Term
| What does Seimic Category 1 ensure? |
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Definition
- RCS pressure boundary integrity
- Reactor can be shutdown and remain shutdown
- Dose limits are met
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Term
| What is an operating basis earthquake? |
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Definition
- Reasonably expected to occur during the lifetime of the plant
- Continued operation expected after plant assessment
- .09 g horizontal acceleration
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Term
| What are the 4 accident types and limits? |
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Definition
- Condition I: Normal Operations (no esf actuation)
- Condition II: Faults of Moderate frequency (ESF actuation on some events)
- Condition III: Infrequent Faults (ESF actuation on some events) damage may occur
- Condition IV: events that are not expected to take place. Postulated because their consequences would include the potential of the release of significant amounts of radioactive material.
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Term
| What is the Design basis accident for MP3? |
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Definition
| Large break LOCA of the cold leg pipe |
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Term
| What are the phases of Design basis LOCA? |
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Definition
- Blowdown
- Refill
- Reflood
- Recirculation
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Term
| Following a LOCA, about how long will it take to get a RWST Lo-Lo alarm |
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Definition
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Term
| Max flowrate for a CHS pump? |
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
| Why do we shift to hot leg recirc several hours after a loss of coolant accident? |
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Definition
| To aid in the collapse of any voids in the top of the rx vessel and prevent boron precipitation on the core surfaces |
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