ML102920107

5.6 Exhibit 5 Surveillance Conclusion

ML102920107
Person / Time
Site:	Crystal River
Issue date:	02/04/2009
From:	Progress Energy Co, Precision Materials Corp
To:	NRC/RGN-II
References
FOIA/PA-2010-0116
Download: ML102920107 (2)

Text

SFM 5-6 Exhibit 5 Page 1 of 2 DCMNT TITLE: FNLREPORT FOR THE 30TH YEAR CONTAINMENT IWL INSPECTION &0 S PROJECT*i"ITLE: 30TH YEAR TENDON SURVEILLANCE AT CRYSTAL RIVER DATE: 02/04/2009 Progress E~nergy

13.0 CONCLUSION

A review of this surveillance was conducted per IWL-3220 Unbonded Post-Tensioning Systems and is outlined below:

IWL-3221 Acceptance by Examination IWL-3221.1 Tendon Force. Tendon forces are acceptableif:

(a) The average of all measuredtendon forces, including those measuredin IWL-3221. 1(b)(2), for each type of tendon is equal to or greaterthan the minimum requiredprestress specified at the anchoragefor that type of tendon; Results: The average tendon force for each type of tendon measured this inspection period was above the minimum design. The average percent above the minimum design for tendon group is as follows: Verticals, +33.6%, Hoops, +7.6% and Dome, +12.5%

(b) The measured force in each individual tendon is not less than 95% of the predicted force unless the following conditionsare satisfied:

(1) The measured force in not more than one tendon is between 90% and 95% of the predicted force; (2) The measuredforces in two tendons located adjacent to the tendon in IWL-3221. 1(b)(1) are not less than 95% of the predicted forces; and (3) The measuredforces in all the remaining sample tendons are not less than 95% of the predicted force.

Results: All vertical and dome tendons tested this inspection period were found to have forces greater than 95% of the corresponding predicted force. Of the hoop tendons, 42H46 and 51 H34 were observed with forces above 95% of their predicted force. Tendons 62H30, 46H21 and 13H36 were found to have forces below 95% but above 90% of their corresponding predicted forces. While monitoring the forces of tendons adjacent to the respective surveillance tendons, NCR's FN1002-001, 002, 003, 006, 007, 008, 009, 011 and 012 were generated to document the conditions and are being dispositioned by CR03ENG. After the completion of testing the adjacent tendons, all tendons with an as-found force below 95% were restored to an as-left force -0%, +6% of their corresponding predicted force in accordance with PSC Procedure SQ9.0.

IWL-3221.2 Tendon Wire or Strand Samples. The condition of wire or strand samples is acceptable if:

(a) samples are free of physical damage; Results: All of the tendon wire test samples were free of physical damage.

(b) sample ultimate tensile strength and elongation are not less than minimum specified values.

Results: All of the tendon wire test samples were found to be acceptable for diameter (0.2756

+/-0.002), ultimate tensile strength (>240 ksi) and elongation(>4%).

• ! -FM5.6Exhibit5 Page 2 of 2 DOCUMENT NUMBER: CR-N1002-504 THREVISION: 1 PAGE: 61 NL't7*'

DOCUMENT TITLE: FINAL REPORT FOR THE 30T YEAR CONTAINMENT IWL INSPECTION kt PROJECT TITLE: 30TH YEAR TENDON SURVEILLANCE AT CRYSTAL RIVER DATE: 02/04/2009 Progress 7 Energy IWL-3221.3 Tendon Anchorage Areas. The condition of tendon anchorageareasis acceptable if.,

(a) there is no evidence of crackingin anchorheads, shims, or bearingplates; Results: Detailed inspections did not reveal any cracks in the anchorage components for any inspected tendon end.

(b) there is no evidence of active corrosion; Results: Detailed inspections did not reveal any active corrosion on the anchorage components for any inspected tendon end. All corrosion conditions were level 1 or 2 (on a scale of 5) and acceptable.

(c) broken or unseated wires,"broken strands, and detached buttonheads were documented and accepted during a preservice examination orduring a previous in-service examination; Results: The VT-1 inspection of 12V01 Field/Bottom detected 3 additional missing buttonheads from the previous examination. The VT-1 inspection of 61V17 Shop/Top detected 2 additional missing buttonheads from the original installation data. These two conditions were documented on NCR's FN1002-004 and FN1002-005, respectively, and are being dispositioned by CR03ENG.

(d) cracks in the concrete adjacentto the bearing plates do not exceed 0. 01 in. in width.

Results: No cracks observed were greater than 0.010" on any of the concrete 24" around the bearing plates of the inspected tendons.

IWL-3221.4 Corrosion Protection Medium.

Corrosionprotection medium is acceptable when the reserve alkalinity, water content and soluble ion concentrations of all samples are within the limits specified in Table IWL-2525-1.

Results: The sheathing filler (grease) samples were tested and found to have acceptable levels of water-soluble ions, (Chlorides, Nitrates, and Sulfides). All tendon samples had a moisture content well within acceptable limits. All neutralization numbers were above the IWL requirement of 0.0 mg KOH/g value and acceptable. No visible breakdown of the grease was noted either by color or consistency for all grease samples tested.

IWL-3222 Acceptance by Evaluation.

Items with examination results that do not meet the acceptance standardsof IWL-3221 shall be evaluatedas requiredby IWL-330.

Results: All conditions that did not meet the corresponding inspection criteria were documented and are being evaluated via the Progress Energy Condition Report process. All of the condition reports generated during this inspection period are included in Appendix C of this report.

Based upon the evaluation of the In-Service Inspection results for the 3 0 th Year Containment IWL Inspection of the Progress Energy Florida Crystal River Unit 3 Containment Structure, reported herein, PSC concludes that the containment structure has experienced no abnormal degradation of the post-tensioning system. The containment post-tensioning system is performing in accordance with the design requirements and are expected to continue to do so for the life of the unit.