Browse wiki

The team identified an unresolved item ass … The team identified an unresolved item associated with evaluation of excessive shipping induced forces of Unit 3 replacement steam generator 3E-088. The team reviewed the SG shipping accelerometer data reports for both Unit 2 and Unit 3. In addition, the team also reviewed shipping and handling records and identified the following: Different transoceanic shipping companies and ships were used (U2: Happy Ranger, U3: Enchanter) During the discharge from the ship Unit 3 replacement steam generator 3E0-88 (3B) recorded simultaneous signals on the three attached accelerometers. Unit 3 steam generator 3E0-88 was the only steam generator to record simultaneous signals on the three attached accelerometers. Unit 3 steam generators received significantly more accelerometers hits compared to Unit 2.Unit 3 replacement steam generator 3E0-88 accelerometers indicated up to a 1.23 g spike with a simultaneous recording on all three of the attached accelerometers. Mitsubishi provided an evaluation of the forces which showed loads were within allowable stress limits but exceeded stress for an operating basis earthquake. The team was not able to determine if this was properly considered. Additional review by the NRC is required to fully assess if the shipping forces contributed to the tube-to-tube wear in Unit 3 and then determine whether this issue represents a performance deficiency or constitutes a violation of NRC requirements.nstitutes a violation of NRC requirements. +

Discovered date

23:59:59, 30 June 2012 +

Docket

05000361 + and 05000362 +

Event date

23:59:59, 30 June 2012 +

Finding integer

7 +

Finding type

URI +

Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.

IR 05000361/2012007 +

Inspector

J Rivera Ortiz +, J Rivera-Ortiz +, E Collins +, E Murphy +, John Reynoso +, J Ortega Luciano +, A Johnsonb +, Hagarg Werner + and Carl Thurston +

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>.

00:47:23, 21 February 2018 +

Person