{"id":5282,"date":"2013-08-25T09:19:25","date_gmt":"2013-08-25T13:19:25","guid":{"rendered":"http:\/\/www.l-a-k-e.org\/blog\/?p=5282"},"modified":"2013-08-25T09:22:04","modified_gmt":"2013-08-25T13:22:04","slug":"pilgrim-and-salem-nukes-scrammed-down","status":"publish","type":"post","link":"http:\/\/www.l-a-k-e.org\/blog\/2013\/08\/pilgrim-and-salem-nukes-scrammed-down.html","title":{"rendered":"Pilgrim and Salem nukes scrammed down"},"content":{"rendered":"

\r\nTwo nukes down Friday:\r\n“lowering reactor water level was due to the trip of all three Feedwater Pumps”\r\n(Pilgrim 1 in Massachusetts) and “unidentified leakage” (Salem 1 in New Jersey).\r\nThat’s the fifth downtime for Entergy’s Pilgrim 1 this year:\r\n\r\ncold, heat, leak<\/a>, and now feedwater pumps.\r\nRemind me about the reliability and safety of big baseload nuclear?\r\n<\/p>\r\n

\r\n\r\n\"Pilgrim<\/a><\/p>\r\n

\r\n\r\nEvent Number: 49296 Facility: PILGRIM<\/a>,\r\n

\r\n

\r\nREACTOR PROTECTION ACTUATION (SCRAM)\r\n<\/p>\r\n

\r\n“On Thursday, August 22, 2013 at 0755 hours [EDT], with the reactor\r\ncritical at approximately 98% core thermal power, and the mode\r\nswitch in RUN, a manual reactor scram was inserted due to lowering\r\nreactor water level. The cause of the lowering reactor water level\r\nwas due to the trip of all three Feedwater Pumps. The cause of the\r\nFeedwater Pump trip event is currently under investigation.\r\n<\/p>\r\n

\r\n“Following the reactor scram, all control rods were verified to be\r\nfully inserted. All 4kV busses transferred to the Startup\r\nTransformer as designed. Following the scram the reactor water level\r\nlowered to +12 inches initiating the Primary Containment Isolation\r\nSystem (Group II, Reactor Building Isolation System (RBIS); and\r\nGroup VI—Reactor Water Cleanup System) automatically as per\r\ndesign.\r\n<\/p>\r\n

\r\n“Reactor water level lowered to -46 inches initiating Primary\r\nContainment Isolation System Group I—Main Steam Isolation\r\nValves (MSIVs); Emergency Core Cooling Systems (ECCS) actuated which\r\nincluded automatic start and injection of the High Pressure Coolant\r\nInjection (HPCI) System and the Reactor Core Isolation Cooling\r\n(RCIC) System and an automatic start of the Emergency Diesel\r\nGenerators as designed. Reactor water level was promptly restored to\r\nnormal level.\r\n<\/p>\r\n

\r\n“Currently a cooldown is in progress with reactor pressure is being\r\nmaintained by the HPCI System operating in the pressure control mode\r\nand reactor water level is being maintained by the RCIC System.\r\nReactor Water Clean-up System and normal reactor building\r\nventilation have been restored. Off-site power is being supplied to\r\nthe station by the Start-up Transformer (normal power supply for\r\nshutdown operations).\r\n<\/p>\r\n

\r\n“This event had no impact on the health and\/or safety of the public.\r\nThe USNRC Senior Resident Inspector has been notified. This 4-hour\r\nnotification is being made in accordance with 10 CFR 50.72\r\n(b)(2)(iv)(A) and (B).”\r\n<\/p>\r\n

\r\nThe plant is transferring from decay heat removal to the torus to\r\ndecay heat removal to the main condenser. Reactor pressure is 371\r\npsig.\r\n<\/p>\r\n

\r\nInitial indications are that a main feedwater power supply breaker\r\ntripped.\r\n<\/p>\r\n<\/blockquote>\r\n

\r\n\r\n\"Pilgrim<\/a>\r\n<\/p>\r\n

\r\n\r\nEvent Number: 49300 Facility: SALEM<\/a>,\r\n

\r\n

\r\nUNIT 1 COMMENCED A TS REQUIRED SHUTDOWN DUE TO UNIDENTIFIED RCS\r\nLEAKAGE > 1 GPM\r\n<\/p>\r\n

\r\n“Salem Unit 1 has initiated a unit shutdown in accordance with TS\r\n(Technical Specification) Action Statement 3.4.6.2(b) for\r\nunidentified leakage greater than 1 gpm [gallon per minute] (Entered\r\non 8\/22\/13 at 1029 EDT). TS 3.4.6.2 Action Statement (b) requires a\r\nreduction of leakage rate to within limits within 4 hrs. or be in at\r\nleast Hot Standby within the following 6 hours. Initial\r\ninvestigation has indicated that the leakage source is from packing\r\non Pressurizer Spray Valve 1PS1 located in the RCS [Reactor Coolant\r\nSystem] Pressurizer shroud area inside Containment. Unidentified\r\nleakage is currently indicating 4 gpm. NRC Resident [Inspector] has\r\nbeen notified. Manual isolation is in progress.\r\n<\/p>\r\n

\r\n“Additionally, TS Action Statement 3.6.1.4 Primary Containment\r\nInternal Pressure was entered at 1510 [EDT] for exceeding 0.3 psig.\r\nAction requires restoration of containment pressure to within\r\nspecification in 1 hour or be in hot standby within the next 6\r\nhours. Containment pressure was restored to less than 0.3 psig at\r\n1647 [EDT] and TS 3.6.1.4 was exited. Peak containment pressure\r\nreached [was] 0.33 psig.\r\n<\/p>\r\n

\r\n“Location of leak: Unit 1 RCS (containment), Pressurizer, 1PS1\r\nPressurizer Spray Valve Packing “Time & date leak started: 1019\r\n[EDT] on 08\/22\/2013 “Leak rate: 4 gpm, T\/S leak limits: 1 gpm “Last\r\nknown coolant activity: Primary (DEI [Dose Equivalent\r\nIodine]-microCuries\/cc) 5.973E-5 microCuries\/cc\r\n<\/p>\r\n“Secondary (gbg [Gross Beta Gamma]-microcuries\/cc) < LLD [Lower Limit of Detectability]\r\n

\r\n“Was this leak a sudden or long-term development? Sudden”\r\n<\/p>\r\n

\r\nThe licensee is reducing power at 30%\/hour and anticipates entering\r\nMode 3 in approximately 3 hours. The 1PS1 Pressurizer Spray Valve\r\nwas replaced and the air operator rebuilt during the last refueling\r\noutage in April\/May of 2013.\r\n<\/p>\r\n

\r\nThe licensee informed the State of New Jersey and will 9inform the\r\nLower Alloways Creek [LAC] Township.\r\n<\/p>\r\n<\/blockquote>\r\n

\r\nThat’s “only” the second downtime for Salem 1 this year;\r\n\r\nit was down April 15th to May 22nd, and finally got to full power June 2nd<\/a>.\r\n<\/P>\r\n

\r\n -jsq\r\n<\/p>","protected":false},"excerpt":{"rendered":"Two nukes down Friday: “lowering reactor water level was due to the trip of all three Feedwater Pumps” (Pilgrim 1 in Massachusetts) and “unidentified leakage” (Salem 1 in New Jersey). That’s the fifth downtime for Entergy’s Pilgrim 1 this year: cold, heat, leak, and now feedwater pumps. Remind me about the reliability and safety of […]","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_links_to":"","_links_to_target":""},"categories":[104,73,3],"tags":[824,663,8702,12,661,33,8737,351,6862,8731,6861,6860,8700],"class_list":["post-5282","post","type-post","status-publish","format-standard","hentry","category-nuclear","category-safety","category-transparency","tag-baseload","tag-entergy","tag-lake","tag-lowndes-area-knowledge-exchange","tag-massachusetts","tag-new-jersey","tag-nuclear","tag-pilgrim-1","tag-pseg","tag-safety","tag-salem-1","tag-scram","tag-transparency"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p585fK-1nc","jetpack_sharing_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/posts\/5282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/comments?post=5282"}],"version-history":[{"count":5,"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/posts\/5282\/revisions"}],"predecessor-version":[{"id":5287,"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/posts\/5282\/revisions\/5287"}],"wp:attachment":[{"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/media?parent=5282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/categories?post=5282"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.l-a-k-e.org\/blog\/wp-json\/wp\/v2\/tags?post=5282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}