... reactors is the 15Kh2MFA low-copper, low-nickel, and vanadium-killed steel. The microstructure and irradiation damage mechanisms of 15Kh2MFA deviate from the other RPV materials. The surveillance specimens in the WWER-440 units are located near the core, the lead factor is between 12 and 18...

... In Korea, the pressurized water reactor (PWR) is the most common nuclear power plant. Twenty-four PWRs are operating commercially or are under construction. According to the public requirements of the reactor pressure vessel (RPV) surveillance program, all PWR plants have surveillance capsules...

... Reactor pressure vessel (RPV) irradiation embrittlement is monitored by means of surveillance capsules containing the RPV beltline materials that are inserted in the RPV before the start of operation. These capsules are placed at locations in which they receive a higher neutron flux than...

... The United Kingdom has included surveillance schemes in nuclear reactors since Calder Hall started in 1957. Early experience in Magnox reactors showed their importance, and sampling schemes have been developed over the years to reflect improvements in the understanding of irradiation damage...

... An overview of the long-term operation (LTO) conditions in European nuclear power plants is presented herein together with recommendations for the reactor pressure vessel (RPV) surveillance programs based on the work performed in the international project LONGLIFE (Treatment of Long-Term...

... A pressurized water reactor (PWR) supplemental surveillance program (PSSP) is being designed to provide high-fluence reactor vessel material embrittlement data for the operating U.S. PWRs. Peak reactor pressure vessel (RPV) fluence levels as high as 7 × 10 19 n/cm 2 ( E > 1.0 MeV...

... and economic lifetime has run out. The units shall be maintained and invested in to ensure a lifetime of at least 50 years, but the actions taken shall not limit the time to this date. When the initial surveillance capsules were evaluated, it was noted that the material properties of the weld material of unit...

... reduction programs were carried out. For the analysis, all transport calculations were carried out by using the DORT 3.1 discrete ordinate code and BUGLE-96 cross-section library. PTS surveillance embrittlement neutron flux reduction vessel Reprinted from JAI, Vol. 9, No. 4 doi:10.1520...

... surveillance systems and proposes new active surveillance systems to support early detection and improved recall decision making. This paper also describes additional benefits of obtaining surveillance information to support iterative design changes and product enhancements. recall surveillance medical...

.... Although large scatter was seen in the relation between ΔT 0 values and Charpy 41J shifts, both shifts were almost the same in the average. reactor pressure vessel surveillance structural integrity irradiation embrittlement fracture toughness precracked Charpy master curve lower bound...

... The neutron fluence determination methods and approaches applied for Kozloduy NPP reactors of type VVER-1000, Units 5 and 6, and VVER-440, Units 1 to 4, according to the Reactor Pressure Vessel Surveillance Program, are presented. The verification/validation of calculated neutron fluence...

... irradiated to fluences from 3.2 to 4.9 × 10 23 n/m 2 (E>1MeV) at 280±5°C, JW and CW irradiated to fluences of 1.4 and 1.5 × 10 23 n/m 2 at 290±5°C, respectively, in the test reactor. JF and JW are also used as surveillance specimens for PWR RPV, and two sets of surveillance data have been acquired...

... was also studied. reactor pressure vessel surveillance structural integrity irradiation embrittlement fracture toughness precracked Charpy master curve lower bound Kunio Onizawa,1Tohru Tobita,1and Masahide Suzuki1 Effect of Irradiation on Fracture Toughness in the Transition Range of RPV...

... (∼10 24 -10 26 n/m 2 ) fast neutron fluence, (E>1MeV) does not decrease the mechanical properties of the R-AlMg2.5 alloy and its weldments, while the toughness of the SZAV-1 weldments is reduced. The reconstructed reactor (called VVRSZM-10) had also a surveillance testing program, and surveillance...

... instrumented Charpy signals establish the load diagram that forms the basis of an enhanced surveillance methodology for plant life management. It is concluded that reconstitution does not affect any characteristic loads in the instrumented load-time traces. surveillance Charpy reconstitution absorbed...

... of information, (4) lack of coaching education, and (5) surveillance. Many injuries can be prevented through educational programs but there has to be a perceived need for these programs. There should be effective dissemination, follow-up, and evaluation systems in place. injury prevention dissemination...

... The reactor pressure vessels at the Yankee Rowe and Belgian BR3 nuclear plants were constructed by Babcock & Wilcox in 1958. The plates of an open-hearth fabrication were welded using a submerged-arc process with Linde 80 flux as the filler. The original surveillance programs at the two...

... Institute (EPRI) projects conducted over the past decade have used this approach. This paper describes how with the use of modern corrosion surveillance instrumentation the objectives of each of these EPRI projects were achieved and an appropriate corrosion management strategy was developed. The final...

... Fast fluences received by four surveillance capsules in two 900-MWe PWR have been calculated with the Monte Carlo transport program MCBEND and compared with values estimated from activation measurements. First comparisons between calculation (C) and experiment (E) gave C/E values equal to 0.98...

... This paper describes the design and operation of the U.S. Consumer Product Safety Commission's National Electronic Injury Surveillance System (NEISS), the development of national estimates and data on injuries, associated with products used in recreational and residential settings...