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On April 08, 2004, during the Unit 1 twelf … On April 08, 2004, during the Unit 1 twelfth refueling outage (1R12), analysis of eddy current data on (Steam Generator) SG 1-4 indicated that greater than one percent of the total tubes inspected in SG 1-4 were defective. Ninety-two (92) defective tubes in SG 1-4 were detected and are being plugged. Most of the (pluggable) indications are due to circumferential primary water stress corrosion cracking in the Rows 5 to 8 U-bend region. Results of the SG tube inspection fall into Category C-3, which requires a four-hour non-emergency report in accordance with Technical Specification (TS) Table 5.5.9-2 and 10 CFR 50.72(b)(3)(ii) (an 8-hour requirement replacing the former (b)(2)(iii)(C), 4-hour requirement). (This was reported in EN#40659 dated 04/08/04.)</br>An NRC teleconference in accordance with TS 5.6.10.d to report the results of the voltage-based repair criteria implemented for the tube support plate intersections was conducted on Wednesday April 14, 2004, at 1300 EDT.</br>On April 20, 2004, following completion of SG eddy current testing, PG&E identified SG 1-1 had greater than one percent of the total tubes that were defective. Forty (40) defective tubes in SG 1-1 were detected and plugged. Most of the (pluggable) indications are due to outside diameter stress corrosion cracking at the SG tube to support plate intersections. SG 1-2 had twenty-six (26) and SG 1-3 had twenty-seven (27) defective tubes that required plugging.</br>A Special Report in accordance with TS 5.6.10.a and e will be submitted prior to returning Unit 1 to power operation.</br>A Licensee Event Report in accordance with 10 CFR 50.73(a)(2)(v)(C) will be submitted within 60 days.</br>The Licensee notified the NRC Resident Inspector. Licensee notified the NRC Resident Inspector. +
01:10:00, 21 April 2004 +
23:26:00, 20 April 2004 +
01:10:00, 21 April 2004 +
On April 08, 2004, during the Unit 1 twelf … On April 08, 2004, during the Unit 1 twelfth refueling outage (1R12), analysis of eddy current data on (Steam Generator) SG 1-4 indicated that greater than one percent of the total tubes inspected in SG 1-4 were defective. Ninety-two (92) defective tubes in SG 1-4 were detected and are being plugged. Most of the (pluggable) indications are due to circumferential primary water stress corrosion cracking in the Rows 5 to 8 U-bend region. Results of the SG tube inspection fall into Category C-3, which requires a four-hour non-emergency report in accordance with Technical Specification (TS) Table 5.5.9-2 and 10 CFR 50.72(b)(3)(ii) (an 8-hour requirement replacing the former (b)(2)(iii)(C), 4-hour requirement). (This was reported in EN#40659 dated 04/08/04.)</br>An NRC teleconference in accordance with TS 5.6.10.d to report the results of the voltage-based repair criteria implemented for the tube support plate intersections was conducted on Wednesday April 14, 2004, at 1300 EDT.</br>On April 20, 2004, following completion of SG eddy current testing, PG&E identified SG 1-1 had greater than one percent of the total tubes that were defective. Forty (40) defective tubes in SG 1-1 were detected and plugged. Most of the (pluggable) indications are due to outside diameter stress corrosion cracking at the SG tube to support plate intersections. SG 1-2 had twenty-six (26) and SG 1-3 had twenty-seven (27) defective tubes that required plugging.</br>A Special Report in accordance with TS 5.6.10.a and e will be submitted prior to returning Unit 1 to power operation.</br>A Licensee Event Report in accordance with 10 CFR 50.73(a)(2)(v)(C) will be submitted within 60 days.</br>The Licensee notified the NRC Resident Inspector. Licensee notified the NRC Resident Inspector. +
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00:00:00, 20 April 2004 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
02:23:43, 2 March 2018 +
23:26:00, 20 April 2004 +
false +
false +
-0.0721 d (-1.73 hours, -0.0103 weeks, -0.00237 months) +
01:10:00, 21 April 2004 +
TS-5.6.10.d + and TS-5.6.10.a +
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