ML102250513

Skoyen Exhibit 18, CE01140617-03 Potential IWE Non-Compliance

ML102250513
Person / Time
Site:	Prairie Island
Issue date:	08/13/2010
From:	- No Known Affiliation
To:	Atomic Safety and Licensing Board Panel
SECY RAS
Shared Package
ML102250494	List: ML102250495 ML102250496 ML102250497 ML102250498 ML102250499 ML102250500 ML102250501 ML102250502 ML102250503 ML102250504 ML102250505 ML102250506 ML102250507 ML102250508 ML102250510 ML102250511 ML102250512 ML102250513 ML102250514 ML102250515 ML102250516 ML102250517 ML102250518
References
50-282-LR, 50-306-LR, ASLBP 08-871-01-LR-BD01, RAS 18400
Download: ML102250513 (2)

Text

SKOYEN EXHIBIT 18 CE01140617-03 Potential IWE Non-compliance Event Description This CE evaluates failure to report refuel cavity leakage and the associated potential for degradation of the containment vessel as required for the IWE program.

The Code of Federal Regulations 10CFR50.55a requires in paragraph (b)(2)(ix)(A) that the licensee shall evaluate the acceptability of inaccessible areas when conditions exist in accessible areas that could indicate the presence of or result in degradation to such inaccessible areas. For each inaccessible area identified, the licensee shall provide the following in the ISI Summary Report as required by IWA-6000: A description of the type and estimated extent of degradation, and the conditions that led to the degradation; An evaluation of each area, and the result of the evaluation, and; A description of necessary corrective actions.

Refuel cavity leakage that contacts the containment vessel is considered conditions in accessible areas that could indicated the presence of or result in degradation of inaccessible areas. Accordingly, the site should have included a discussion of the leakage in the 90 day summary report following each outage that such leakage occurred. The site failed to report the 2R24 refuel cavity leakage and previously in 2R22.

The primary purpose of this CE is to identify instances of leakage since the beginning of the current IWE interval (September of 1996) that were not appropriately reported.

Following is a summary of refuel cavity leakage events and report status based on a review of associated CAPs, 90 day summary reports, and other sources such as program notes. The following is based on a reasonable search of available documentation and may not be complete or conclusive.

Outage Approx. Leakage Cap # Included in 90 Day Date Report?

2R18 Apr-97 Unknown 1R19 Oct-97 Unknown 2R19 Oct-98 Leakage in Sump B and other 00051045 Yes. Reported by locations. Initial AES amendment evaluation. AR00122811 1R20 Apr-99 Leakage in Sump B and other 00057041 Yes. Reported by locations. amendment AR00122811 2R20 Apr-00 Unknown 1R21 Jan-01 No Leakage. Installed N/R Strippable liner.

2R21 Feb-02 No Leakage. Installed N/R Strippable liner.

1R22 Nov-02 Leakage in Sump B. 00284714 Yes. Included in Strippable liner failed to stop original summary leakage. report.

2R22 Sep-03 Leakage in various locations. 00531162 Failed to include in report.

1R23 Sep-04 Leakage noted in regen room 00751496 N/R

2R23 May-05 No Leakage. Caulked N/R penetrations 1R24 May-06 No Leakage. Caulked N/R penetrations 2R24 Nov-06 Leakage in Sump B. Revised 01064513 Failed to include in AES evaluation. report.

1R25 Jan-08 No Leakage. Caulked N/R penetrations Indications are the site failed to report leakage for 2R22 and 2R24. Other outages either did not have leakage or the status of leakage and the need to report is unknown.

Corrective Actions and Final Disposition A corrective action AR 01140617-05 has been initiated to submit an amendment to the 2R22 and 2R24 90 day summary reports to meet the requirements of 10CFR50.55a(b)(2)(ix)(A). Submission of the amendment will restore compliance and allow the associated OBN to be closed.