Tech spec 3.6 containment

how long do we have to restore containment if it becomes inoperable?

restore in 1 hour

what is the allowable design leakage of CTMT?

design leakage of 0.1% of CTMT air mass per day at 58 PSIG in CTMT

how is the containment leak tight barrier maintained?

all penetrations are required closed during accident conditions are either

1. capable of being closed by an operable automatic CIV

2. OR closed by manual valves, blind flanges, de-energized lock closed (ect)

what is required if one door in an airlock is inoperable?

one hour to verify operable door is closed

24 hours to lock the operable door

what is required if the Air lock door mechanical interlock is inoperable

in 1 hour verify the operable door is closed

in 24 hours lock the operable door

what is required if an airlock is inoperable?

immediately evaluate overall CTMT leakage

1 hour verify a door is closed

what would make an airlock inoperable?

cracked viewing glass, equalizing valve leak, or door seals leaking

what are the LCO CTMT pressure limits and what is required if it cant be met?

-0.3 psig to 2.5 psig

1 hour

what is the LCO indicated limit for CTMT pressure

1.8 PSIG (use NR PTs for STs)

this ensures max accident design pressure is not exceeded

what is the purpose of the lower limit for CTMT pressure?

ensures negative design pressure of -4 psig not exceeded during inadvertent spray

what is the limit on CTMT temperature and how long do we have to restore?

maintain less than 120F

if exceeded 8 hours to restore

what is the most limiting event for CTMT temperature?

main steam line break in containment

how is average temp determined in containment?

average temp determined using 5 of the 7 TIs

when is CTMT spray required to be operable? what actions are taken if we cant maintain spray operable?

modes 1-4 when RCS is greater than 385 PSIA

in one train is inop then restore in 72 hours or mode 4 less than 385 PSIA in 84 hours

if Both inop enter LCO 3.0.3

what is the purpose of CS?

maintains CTMT temp/ pressure

removes Iodine from atmosphere

mixes H2 to prevent H2 pockets

what is the capability of one CS pump?

one train reduces CTMT pressure to ½ the peak pressure within 24 hours

how can a CTMT isolation path be un isolated with admin control?

dedicated operator stationed at valve with continuous coms with the CR

must be able to close the penetration in 60 seconds

what is required if one or more paths with one CIV is inoperable?

restore within 4 hours or RICT

what is required with one or more flowpaths inoperable with two CIVs inoperable

restore in one hour or RICT

what is the purpose and design basis of CIVs

minimize loss of RCS inventory and radioactivity release during a DBA

DBA assumes CTMT isolation within 60 seconds

and access purge valves closed within 12 seconds of DBA

when are access purge valves NOT required to be closed

can be opened if needed for ALARA, air quality for CTMT entry, or for testing, if open for other reasons, they are considered inoperable

when are check valves used to isolate penetrations considered secured?

check valves used to isolate a penetration are considered secured in their actuated position when flow through the valve is secured

what is the purpose of the Hydrogen purge cleanup unit?

maintains H2 below flammable limits (4%) after a LOCA

what is the purpose of the Hydrogen recombiners?

maintains less than 4% H2 following a LOCA

H2 flow control function is maintained within 1 hour