05000348/FIN-2007005-01: Difference between revisions
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{{finding | {{finding | ||
| title = Potential Flooding | | title = Potential Flooding of Containment Sump Suction Valves | ||
| docket = 05000348, 05000364 | | docket = 05000348, 05000364 | ||
| inspection report = IR 05000348/2007005 | | inspection report = IR 05000348/2007005 | ||
| Line 12: | Line 12: | ||
| identified by = NRC | | identified by = NRC | ||
| Inspection procedure = IP 71111.06 | | Inspection procedure = IP 71111.06 | ||
| Inspector = C Even, E Crowe, E Michel, R Berry, R Moore, S Sandal, S Shaeffer, W Fowler, B Caballerob, | | Inspector = C Even, E Crowe, E Michel, R Berry, R Moore, S Sandal, S Shaeffer, W Fowler, B Caballerob, Caballeroc Even, E Crowe, E Michel, R Berryman, R Moore, S Sandal, S Shaeffer, W Fowlerg, Khouris Alexander, T Ross, W Lewis | ||
| CCA = N/A for ROP | | CCA = N/A for ROP | ||
| INPO aspect = | | INPO aspect = | ||
| description = On November 1, the licensee performed boroscope inspections of the Unit 1 guard pipes associated with the encapsulated valves in the RHR and SC systems containment sump suction lines. The licensee initiated these inspections due to the continuing discovery of water in the encapsulations of these valves during quarterly inspections. When water was observed in the Unit 1 CS system Train B guard pipe, the licensee performed a core drill into the vertical pipe chase to which the was guard pipe attached and discovered approximately 500 gallons of water. The licensee decided to perform core drills of the remaining seven vertical pipe chases (3 on Unit 1 and 4 on Unit 2). The licensee discovered no water in the Unit 2 CS system Train A vertical pipe chase, but did discover approximately 100 gallons of water in the Unit 2 RHR system Train A vertical pipe chase. The licensee plans to assemble a team to review the chemical analysis of the water and the camera inspections of the vertical pipe chases to determine the source(s) of the water. Water entering the vertical pipe chase could communicate with the containment sump suction isolation valve for each train of the RHR and CS systems and potentially render these valves inoperable. This issue will remain unresolved pending further review of the source of water and evaluation for adverse impact on system operability and is identified as Unresolved Item (URI) 05000348,364/2007005-01, Potential Flooding of Containment Sump Suction Valves. | | description = On November 1, the licensee performed boroscope inspections of the Unit 1 guard pipes associated with the encapsulated valves in the RHR and SC systems containment sump suction lines. The licensee initiated these inspections due to the continuing discovery of water in the encapsulations of these valves during quarterly inspections. When water was observed in the Unit 1 CS system Train B guard pipe, the licensee performed a core drill into the vertical pipe chase to which the was guard pipe attached and discovered approximately 500 gallons of water. The licensee decided to perform core drills of the remaining seven vertical pipe chases (3 on Unit 1 and 4 on Unit 2). The licensee discovered no water in the Unit 2 CS system Train A vertical pipe chase, but did discover approximately 100 gallons of water in the Unit 2 RHR system Train A vertical pipe chase. The licensee plans to assemble a team to review the chemical analysis of the water and the camera inspections of the vertical pipe chases to determine the source(s) of the water. Water entering the vertical pipe chase could communicate with the containment sump suction isolation valve for each train of the RHR and CS systems and potentially render these valves inoperable. This issue will remain unresolved pending further review of the source of water and evaluation for adverse impact on system operability and is identified as Unresolved Item (URI) 05000348,364/2007005-01, Potential Flooding of Containment Sump Suction Valves. | ||
}} | }} | ||
Latest revision as of 20:32, 20 February 2018
| Site: | Farley  |
|---|---|
| Report | IR 05000348/2007005 Section 1R06 |
| Date counted | Dec 31, 2007 (2007Q4) |
| Type: | URI: |
| cornerstone | No Cornerstone |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.06 |
| Inspectors (proximate) | C Even E Crowe E Michel R Berry R Moore S Sandal S Shaeffer W Fowler B Caballerob Caballeroc Even E Crowe E Michel R Berryman R Moore S Sandal S Shaeffer W Fowlerg Khouris Alexander T Ross W Lewis |
| INPO aspect | |
| ' | |