ML102040510
| ML102040510 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 10/21/2009 |
| From: | Mark Franke NRC/RGN-II |
| To: | Wert L NRC/RGN-II |
| References | |
| FOIA/PA-2010-0116 | |
| Download: ML102040510 (2) | |
Text
- .Fran ke, Mark From:
~Franke, Mark.a Sent:
Wednesday, October 21.2009 6:42 AM To:
Wert, Leonard:.
Subject:
RE: INFO:: Crystal River C~ontainmentWal*
Thanks Len. (Ihad it:few weeks ago.. maybe lmaking full circle).
From'. Wert,; Leonard' Sent: Wednesday, October 21,. 2009 6:35 AM To: Franke, Mark Cc: Kennedy,.Kriss
Subject:
FW:. INFO: Crystal River:Containment wall FYI. involves: a dome: issuebut mayhave. some*:good: info...
Fromn Plisco,:Loren (iy:
Sent: Tuesdayi October 20, 2009 2:25 PM To: Munday, Joel; Wert,.Leonard.
Subject:
FW: INFO: Crystal. River Containment: Wall
,assuming. you guys have already seen this attached papet about.a similar problem in Japan - but just in
- case;....
From: Tabatabai Oid
.Sent: Friday, October 09,r2009.12:4.3 PM To: Snodderly, Michael; Thomas, Brian.
Cc-: Dudes, Laura; Bergman, Thomas; Plisco, Loren; Tappert, John
Subject:
INFO: Crystal River Containment.Waili.
Just fyi, keeping youall updated on the: subject.. We are'followihg up the :issue and will be processing the info per our ConE program..
Status: The plant is in mode 6, green.risk.Reactor head isiremoVed and the water level is 158 feet (23 feet above RV flange) and 99F. Fuel in vessel with time to boil i at 404 r minutes. The equipment hatch is open.
Defdeling started last night and: thirty assemblies have been removed. Offload is scheduled to be completed by 23:00 on 10/9.
Containment.Hydro-demolition of concrete was completed. Licensee:is planning to perform a modification to support an outside lift system as a result of cracks identified.in concrete. A ro:ot cause investigation is in progress. Sargent and LundiyJs involved with the investigation and corrective actions. The concrete around the containment liner is nominally:42 inches thick. CR Containment: Picl 10-8ipgq; CR Containment Pic 2 10-8.ipq; CR Containment Pic 3 1078.lpq -:treat.theselpictures as.OWffical Uise Only-are located in the area of the horizontal tendons, leaving: at least 30, inches of concrete betWeen the containment liner and the crack. The.
licensee:analysis is continuing with the assumption that the crack is around the entire 360 degree circumference, and the full height of the structure is affected.
.Region* has determined that the designer of the CR containment (Gilbert Associates) also designed the containments at,VC Summer, Perry, TMI and Ginna. RegionMll hasbconfirmed that VC Summer has been in contact With CR to discuss this issue. Region II.has alerted Regions :Iand ll1. (NOTE: VCOSummer confirmed:
-that they-did NOT have to cut a hole in containment to performa steam, generator replacement in the past.
Ginna performed a SG: replacement in the 1990s where containment:was cut, and TMI has an upcoming 177
I.
refueling outage where SGs will be replaced.) The region plans on performing a special Inspection at Crystal River, regarding the 6containment crack, tentatively starting on Monday, October 12, 2009.
Excerpts from Crystal River FSAR:
The design and construction of the reactor building has been given a thorough re-evaluation subsequent to the discovery on April14, 1976, of a delaminated condition in the dome. The upper part (approximately 12 inches thick) of the 3 feet design concrete thickness separated from the lower part of the dome structure parallel to the membrane over an approximate diameter of 105 inches. Extensive analytical and field investigations were conducted to establish an acceptable repair program. This repair program included removal of the upper part of the dome, placement of non-prestressed reinforcing steel mats, installation of radial reinforcement, and placement of concrete to restore the dome to a thickness of 3 feet Details of the delamlnated condition of the dome, reevaluations of the dome, and the dome repair program are described in the report: "Final Report - Reactor Building Dome Delamination", December 10, 1976.
The Reactor Building is similar in design to the containment buildings for the Three Mile Island Nuclear Station Unit I (Docket No. 50-289), the Turkey Point Plant (Docket Nos. 50-250 and 251), the Palisades Plant (Docket No. 50-255), the Point Beach Plant (Docket No. 50-226). and the Oconee Nuclear Station (Docket Nos. 50-269, 50-270, and 50-287).
NOTE: Crystal River - License Renewal Application received by the NRC on December 18, 2008. Click on the link to view the status.
The licensee was contacted by the State of Florida DEP Coordinator and asked whether they were in an unusual event due to contaminated water leaking from a crack in containment. The licensee corrected the misinformation and MAY contact the local press to Inform them of the RB crack issue to preclude any further misunderstandings.
- NOT*RY IS OFFICIAL USE ONLY - MAY CONTAIN SENSITIVE INTERNAL DO NO) FORWARD ANY POR 0
E OF NRC WI T FIR TAINING SSION
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FROM ORIGINATOR 178