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1. 发明专利

JPH02147987A CLUSTER GUIDE TUBE FLANGE OF NUCLEAR REACTOR AND APPARATUS FOR CENTERING AND FIXING REACTOR CORE AND PLATE 失效
公开(公告)号：JPH02147987A
公开(公告)日：1990-06-06
申请号：JP25988989
申请日：1989-10-04
申请人： FRAGEMA FRAMATOME & COGEMA
发明人： JIERAARU SHIYUBUROO
IPC分类号： G21C1/08 , G21C5/02 , G21C7/08 , G21C7/14 , G21C19/02
摘要： PURPOSE: To perform centering to a guide pipe flange common reference shaft by carrying a self lock shoe with a flange and engaging it to a position control mechanism for applying a transversal force to the shoe. CONSTITUTION: A device has two spindles 13 and 14 for guiding a flange 8 that is fixed to a reactor core plate 2 or a guide pipe flange 8 at an opposite side in diameter direction for the plate 2 and an assembly body of a self lock shoe 18 that is slid in a bore formed in the flange 8 for contacting the surface of the plate 2 with a gap. Then, the shoe 18 is carried by the flange 8 and is engaged to a position control mechanism so that force with a constituent in cross direction is applied to the shoe 18 for preventing the flange 8 from moving against the plate 2 due to reaction, thus centering the flange 8 to a common shaft axis.

2. 发明专利

JPH028788A LOWER INTERIOR EQUIPMENT FOR NUCLEAR REACTOR 失效
公开(公告)号：JPH028788A
公开(公告)日：1990-01-12
申请号：JP3006089
申请日：1989-02-10
申请人： FRAGEMA FRAMATOME & COGEMA
发明人： JIERAARU SHIYUBUROO , MISHIERU BABAN
IPC分类号： G21C1/08 , G21C5/08 , G21C15/02 , G21C17/032 , G21C17/108
摘要： PURPOSE: To reduce the head loss of coolant on the upstream side from a core and head of coolant flowing out from the circumference of core by mounting an isolation plate on the lower wall of a core supporting plate and making a hole communicating with a coolant transfer duct through the isolation plate. CONSTITUTION: The reactor core is supported on a lower supporting plate 7 having passage holes 8. A lower inner unit 34 is provided with a wall means 35 for partitioning a volume section 36 located between the supporting plate 7 and the lower section 37 of a vessel. The means 35 has a wall 38 provided with a hole 39 and a duct 40 for transferring a coolant from the lower section 37 of vessel toward the passage 8. The unit 34 is further provided with an isolation plate 41 for partitioning a distribution chamber 42. The isolation plate 41 has a hole 43 to which the coolant transferring duct 40 is opened and secured to the supporting plate 7 through a mechanical coupling means 44 which are distributed around the isolation plate 41 while defining a passage 45 for feeding the coolant into the chamber 42. This structure reduces head loss due to abrupt change in the flowing direction of coolant around the core.

3. 发明专利

JPH0262999A PRESSURIZED WATER TYPE REACTOR 失效
公开(公告)号：JPH0262999A
公开(公告)日：1990-03-02
申请号：JP11760389
申请日：1989-05-12
申请人： FRAGEMA FRAMATOME & COGEMA
发明人： JIERAARU SHIYUBUROO , KUROODO KOKURAN , KUROODO FUARUDEYUTSUTEI
IPC分类号： G21C1/08 , G21C15/02 , G21C15/18
摘要： PURPOSE: To prevent a thermal shock from occurring on sensitive parts such as a side ring of a vessel in a horizontal level of a reactor core and a fuel assembly by providing a support plate, a distribution space and the reactor core. CONSTITUTION: A support plate 16 is fixed to a casing 14 and defines a distribution space 18 in conjunction with a bottom section of a vessel 1O. A reactor core 20 is formed of juxtaposed fuel assemblies which are supported by a support plate 16 and standing straight in the overall height (h). An inlet nozzle and an outlet nozzle 24 are provided to the vessel 10. During the normal operation, a pressurized water arrives at the inlet nozzle, flows downwardly toward the space 18 through a ringed path defined by a side ring of the vessel 10 or the casing 14, passes the reactor core 20 through a hole of the support plate 16 and flows upwardly toward a plenum to be discharged from the nozzle 24. Thus, it is possible to prevent a thermal shock from occurring on sensitive parts.

4. 发明专利

JPH01297595A UPPER INTERNAL APPARATUS FOR NUCLEAR REACTOR 失效
公开(公告)号：JPH01297595A
公开(公告)日：1989-11-30
申请号：JP3006189
申请日：1989-02-10
申请人： FRAGEMA FRAMATOME & COGEMA
发明人： JIERAARU SHIYUBUROO , AREN UUZU
IPC分类号： G21C15/02 , G21C5/08 , G21C7/08
摘要： PURPOSE: To facilitate positioning of each cluster guide in a coolant flow separator by providing a cluster guide equipped with an outer casing having no hole for an upward flow of the coolant. CONSTITUTION: The attachment 12 comprises a collection assembly 19 having a plurality of guide pipes 21 for collecting a coolant and directing toward an output nozzle, a control cluster 10 interposed between the collection assembly 19 and a core 6, and a drive shaft guide. The attachment 12 further comprises a lower plate 24 provided with a passage for the coolant from the core 6, an ipper plate 27 provided with a passage for the coolant flowing toward the collection assembly 19, an enclosure and a separator 22. Furthermore, the cluster guide 23 of the flow separator 22 is provided with an outer casing 35 coupled to the coolant tightly with the upper and lower plates 24, 27 having no hole 25 and each guide pipe 21. The guide pipe 21 is provided with a side wall having no hole 28 within the assembly 19 and each guide pipe 21 is formed on the underside of a cover 3 and provided with an opening for feeding the coolant from the flow-in nozzle 4 into the volume section.

5. 发明专利

JPH0210194A UPPER INTERIOR EQUIPMENT FOR WATER COOLED DECELERATION REACTOR 失效
公开(公告)号：JPH0210194A
公开(公告)日：1990-01-12
申请号：JP3388389
申请日：1989-02-15
申请人： FRAGEMA FRAMATOME & COGEMA
发明人： JIERAARU SHIYUBUROO , GII DESUFUONTEENU , BERUNAARU DEYUMORUTEIE
IPC分类号： G21C1/08 , G21C5/02 , G21C7/08 , G21C7/14 , G21C7/27
摘要： PURPOSE: To lessen instability and vibration by connecting a cluster guide with a bottom wall through a shoulder part formed in a path piercing the bottom wall and positioned in a lower-half part of the width of the bottom wall in a state that the cluster guide is butted against the bottom wall. CONSTITUTION: An outside and downward shoulder part 46 which receives a corresponding upward shoulder part 48 formed at a position as low as possible in a path piercing a supporting plate 14 is formed in a cluster guide 26. Consequently, the cluster guide 26 is butted against the bottom wall of the supporting plate 14. A hole 50 in which the cluster guide 26 is to be fitted by sliding fit is formed in the tip part of the path and since a gap is kept in a radius direction between the shoulder part 48 and the hole 50, the cluster guide 26 can be held in properly conformed state in the up and down directions penetrating the supporting plate 14 by connecting the cluster guide 26 and the supporting plate 14. As a result, instability and vibration due to cooling water flow can be lessened.

6. 发明专利

JPH01296193A PRESSURIZED WATER TYPE NUCLEAR REACTOR 失效
公开(公告)号：JPH01296193A
公开(公告)日：1989-11-29
申请号：JP32228288
申请日：1988-12-22
申请人： FRAGEMA FRAMATOME & COGEMA
发明人： JIERAARU SHIYUBUROO , KUROODO KOOKERAN , AREN UUZU
IPC分类号： G21C5/10 , G21C5/08 , G21C11/06 , G21C15/10
摘要： PURPOSE: To improve the cooling water flow by centering annular bodies to the casing using a key, containing a plug body defining a water flow channel in the annular bodies and making vertically aligned holes defining a cooling slot. CONSTITUTION: A Partition is formed of a laminate comprising annular bodies 181 -186 wherein the cross-section of laminate has circumference matching the outline of a core. The laminate has a circular outer circumference and a gap (j) is present between the casing 12 and the partition on the outer circumference. The annular body 181 -186 is secured to the casing 12 and divided while being aligned in the casing 12 by means of a key projecting into a slot made in the annular body 181 -186 in the longitudinal direction. The annular body 181 -186 has three tubular shapes each having a shoulder 30 abutting on a plug body 32. The plug body 32 has a protrusion to be fitted in a corresponding recess 34 in the annular body. An axial passage 36 is formed along the plug body 32 while penetrating each plug body. The passage 36 has a constricted section 38 for producing a head loss and regulating the ratio of a flow rate.

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