This issue was raised in an AEOD memorandum[1] to NRR in May 1982 and addressed the problem of flow blockage by blue mussels (Mytilus Edilus) in the reactor building closed cooling water system at Pilgrim.
This issue has been combined and evaluated with Issue 51, "Proposed Requirements for Improving the Reliability of Open Cycle Service Water Systems."
[1] Memorandum for H. Denton from C. Michelson, "Engineering Evaluation of the Salt Water System (SSWS) Flow Blockage at the Pilgrim Nuclear Power Station by Blue Mussels (Mytilus Edilus)," May 6, 1982. [8205130114]
Page Last Reviewed/Updated 06/24/2025