In October 2013 the refuelling outage started in the Krško NPP. During transfer of fuel assemblies from the reactor to the spent fuel pool a 50 cm long segment of a fuel rod was found at the bottom of fuel transfer channel. Visual inspection of all fuel assemblies unloaded from reactor core showed open defects in 9 fuel rods cladding of 4 fuel assemblies. These 9 fuel rods were all broken with some parts of cladding and fuel pellets missing. The cause of such extensive fuel cladding failure is secondary degradation by zirconium hydride. The primary cause of fuel rods leakage is attributed to baffle jetting that can occur at these fuel assemblies’ locations at the core baffle plate. Open fuel cladding defects were diagnosed from measurements of I-134 activity of the reactor coolant since July 2012, two months after the previous refuelling outage. The release of fission products from the damaged fuel occurred during the NPP operation. During refuelling outage in October and November 2013 there were no additional radioactive releases from the damaged fuel rods. There was no additional exposure to the workers during the fuel transportation.
Extensive inspection of fuel assemblies and the core baffle plate was carried out to determine the cause of fuel defects and to assure the integrity of the fuel assemblies to be reloaded into the new reactor core. Fuel reconstitution campaign was carried out to replace several fuel rods at exposed locations on the core baffle with stainless steel dummy rods that can resist to the baffle jetting. The root cause analysis of the fuel damage including the proposed corrective actions will be prepared by the fuel supplier and by the operator after the outage.
EPZ, the operator of the Borssele nuclear power plant, has long claimed that it recycles "95 percent" of its nuclear fuel, and that only "5 percent" remains as nuclear waste. Following a complaint by Laka, the Board of Appeals of the Dutch Advertising Authority, ruled yesterday that these are misleading environmental advertisement claims. In its […]
(Nederlandse versie) On Sunday, September 11, the Mikhail Dudin arrives in the port of Rotterdam; a ship carrying Russian uranium. There it will be transferred to trucks that will then transport it across the Netherlands on Monday to Lingen, Germany, where the uranium will be processed into fuel rods. This was announced this morning by […]
(Nederlandse versie) Laka sometimes gets the question that if nuclear power plants in France can be used flexibly, can nuclear power not be used as a intermittent source of electricity, complementing wind and solar? The short answer then is, that if nuclear power plants can be used flexibly, it does not mean that in France […]
New brochure focusing on the uranium enrichment consortium Urenco. The Treaty of Almelo was signed on 4 March 1970 ‒ an agreement between the Netherlands, the United Kingdom and West Germany on setting up a company with the aim of enriching uranium: Urenco. The origin of uranium enrichment is military and until then enrichment was […]
Despite its triumphant press release of the contrary, two years ago, NRG, the operator of the High Flux Reactor in the Netherlands, this week confirmed Laka’s suspicion that NRG is still using weapons-grade highly enriched uranium in its reactor. Therefore, the Netherlands is currently in breach of its agreement with Obama, reached at the Nuclear […]
