Extensive Damage Mitigation Flashcards
What is the purpose of Extensive Damage Mitigation Response
To have procedures for when events either make CR non-functional or Incapacitate CR Staff
interm command until ERO becomes functional
Procedure Entry Conditions for Extensive Damage Mitigation
- A large fire, explosion or other event has occured in the area of the control room complex
- the control room complex is not accessible or functional
- Unable to establish communications with the control room complex staff or the control room complex staff has been incapacitated
Guidelines assumed with an EDM accident
- The initiating event occurs without warning
- the initiating event occurs at the time of minimum staff manning
- loss of access to the control room complex
- loss of all equipment, supplies, and personnel normally in the control room complex
- loss of all AC and DC power required for operation of plant systems
- the work control center SRO and the Tour Auxilary Equimpent operators remain available
Who is in charge during the initial responce to and EDM accident on site
The most senior Operations Person on site (could be an AEO)
describe the intent of 10 CFR 50.54
A licensee mayu take reasonable action that departs from a license condition or a tech spec in an emergency when this action is immediately needed to protect the public health and safety and no other actions are readily apparent.
Given an EDM accident what are the radiation dose limits during accident conditions
- 5 rem whole body for damage assessment
- 10 rem whole body per incident for the protection of valuable equipment
- 25 rem whole body per lifetime for life saving activities
- site emergency coordinator permission has to be obtained prior to exceeding one of these limits
What is needed to exstablish a command and control center
- Find a place
- north basement classroom
- fire brigade command trailer
- any unaffected structure
- establish communications with the following
- security commander
- will get ERO going
- fire incident commander
- security commander
- as personnel report have them log in on data sheet 6 the accountability checklist
classify equipment as: available, damaged, or destroyed
- Available
- No apparent damage to equipment and could be used if controls, power, and supporting syustems are available.
- Damaged
- minor problems that can be corrected without specialized parts or tools, for example reconnecting wiring, piping, or couplings (no oil visible with out signs of massive oil leak)
- Destroyed
- major problems with equipment that require special tools or parts to repair
Alternate strategys to EDM Make up to the RWST
- provide fire water to the RWST for a minimum of 12 hours at 300 gpm from fire tanks
- RWST to RWST transfer via fire truck or portable pump
- Fire water make up to the rwst via the drain flange
- use a fire hydrant
Alternate strategys to EDM Manually depressurize steam generators
- Feed with aux feed and drain with steam lead warming lines and drains
- maintain between 90 and 110
Alternate strategys to EDM Manual operation of the TDAFP
- Harpoon the trip device until mechanical overspeed resets
- qt-506 clockwise until reset then throttle open slowly especially if you have water in the turbine
- throttle fw 136 if greater than 500 gpm
Alternate strategys to EDM Alternate feed for steam generators with use of portable pump
- Provide Fire water to the steam generator at 200 gpm for 12 hours minimum
- SG pressures <200 Psig prior to opening drain valves to ensure no backflow or over pressurization of fire hose
- need 3 hoses minimum 1 per steam generator
Alternate strategys to EDM Alternate suction source to the turbine driven auxilary feed water pump
- Use fire water as a suction source for the TDAFP at 200 gpm for 12 hours minimum
Alternate strategys to EDM Containment Flooding
- Use fire water to RHR spray header at 300 GPM for minimum 12 hours
- Use the use the Refueling Water Purification Pump if available
Alternate strategys to EDM Starting Hydrogen igniters
- turn them on in the CD EDG rooms
