|PART-21 NOTIFICATION - SNUBBER HYDRAULIC FLUID BATCH CONTAINS PARTICULATES
The following report was received via fax:
"Pacific Gas and Electric notified Curtiss Wright [CW] Enertech that they observed white particulate in SF-1154 fluid in three containers. The white particulate was found settled at the bottom of the containers. The fluid was dedicated and supplied by CW Enertech in November 2016 The fluid was traced back to Momentive Batch 14ELVS145.
"The momentive batch 14ELVS145 was previously reported by Lake Engineering Company (Ref NRC ML17212A628 and ML17128A465). The white particulates/semisolid material was identified as phenyl cyclic precipitate. The safety hazard that could be created by this defect is the blockage of snubber bleed port as reported by Duane Arnold (Ref ML070300154). This blockage could prevent the snubber from unlocking after a seismic event, thus preventing the snubber to allow for system movement during normal operations.
"In addition, evaluation performed by Lake Engineering Company has found that all of the solids are dissolved back into the fluid when heated to 110 [degrees] fahrenheit. With all solids dissolved, there is no potential safety hazard with this fluid."
Affected sites: Fermi, Shearon Harris, Beaver Valley, Diablo Canyon, Watts Bar, Perry, and Almaraz (Spain).
Curtiss-Wright point of contact: Rosalie Nava, 714-528-2301 ext 1872
See also EN 43071 dated 1/3/2007