Passive safety equipment and nuclear power plant including same

Patent metadata

Field	Value
Publication number	US-2016247585-A1
Application number	US-201415024795-A
Country	US
Kind code	A1
Filing date	Oct 2, 2014
Priority date	Oct 4, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

The present invention provides passive safety equipment, comprising: a cooling part formed to cool a first fluid, which is emitted from a reactor coolant system or a steam generator, and a second fluid in a housing; and a circulation induction sprayer which is formed to spray the first fluid emitted from the reactor coolant system or the steam generator into the cooling part, has at least part thereof open to the inside of the housing such that the second fluid flows thereinto according to a drop in pressure caused by the spraying of the first fluid, and sprays the second fluid with the inflown first fluid.

First claim

What is claimed is:

1 . A passive safety facility, comprising:
a cooling section formed to cool a first fluid discharged from a reactor coolant system or steam generator along with a second fluid within a containment; and a circulation inducing jet device formed to jet the first fluid discharged from the reactor coolant system or the steam generator to the cooling section, at least part of which is open toward an inside of the containment to entrain the second fluid by a pressure drop caused while jetting the first fluid so as to jet the entrained second fluid along with the first fluid.

2 . The passive safety facility of claim 1 , wherein the circulation inducing jet device comprises:
a first fluid jetting section connected to the reactor coolant system or the steam generator to receive the first fluid, and formed to jet the received first fluid; a second fluid entraining section formed in an annular shape around the first fluid jetting section to entrain the second fluid within the containment; and a circulating fluid jetting section configured to surround the first fluid jetting section with a portion having an inner diameter larger than that of the first fluid jetting section to form the second fluid entraining section, and supply the first fluid and the second fluid to the cooling section.

3 . The passive safety facility of claim 2 , wherein the first fluid jetting section comprises a nozzle configured to jet the first fluid to the circulating fluid jetting section, and
the circulating fluid jetting section comprises: a throat formed with an inner diameter smaller than that of an inlet of the nozzle to cause a local pressure drop while jetting the first fluid; and a diffuser configured to induce the first fluid and the second fluid that have passed through the throat to the cooling section.

4 . The passive safety facility of claim 2 , wherein the circulation inducing jet device comprises:
a turbine blade rotatably installed at an outlet of the first fluid jetting section to induce the jetting of the first fluid; and a pump impeller connected to the turbine blade to rotate along with the turbine blade, and induce the entrainment of the second fluid through the second fluid entraining section.

5 . The passive safety facility of claim 1 , further comprising:
a filter facility connected to an outlet of the cooling section to filter out noncondensible gas discharged from the cooling section, and collect radioactive materials filtered out from the noncondensible gas.

6 . The passive safety facility of claim 5 , wherein the filter facility comprises:
a filter or absorbent configured to separate the radioactive materials from the noncondensible gas; a gas discharge section configured to discharge noncondensible gas filtered out while passing through the filter or absorbent to an inside of the containment; and a gas line connected to the outlet of the cooling section to supply the noncondensible gas to the filter or absorbent.

7 . The passive safety facility of claim 1 , wherein the cooling section cools the first fluid and the second fluid to form condensate, and
the passive safety facility further comprises a cooling water storage section formed to store cooling water therein, and the cooling water storage section is installed below the cooling section to collect the condensate discharged from the cooling section.

8 . The passive safety facility of claim 1 , wherein the cooling water storage section comprises:
a first cooling water storage section configured to store pure cooling water to be supplied to the steam generator so as to remove sensible heat within the reactor coolant system and residual heat in a core; and a second cooling water storage section configured to store borated water to be injected into the reactor coolant system so as to maintain a level of the reactor coolant system.

9 . The passive safety facility of claim 8 , wherein the passive safety facility further comprises an additive injection section configured to inject an additive into the condensate for suppressing the revolatilization of condensate collected in the cooling water storage section, and
the additive is formed to maintain a pH of the condensate above a preset value.

10 . The passive safety facility of claim 9 , wherein the cooling water storage section is configured to collect the condensate in the first cooling water storage section, and flow the condensate collected in the first cooling water storage section into the second cooling water storage section when a level of the collected condensate exceeds a reference level, and
the additive injection section is installed at a flow path connected from the first cooling water storage section to the second cooling water storage section to inject the additive into the condensate flowing into the second cooling water storage section.

11 . The passive safety facility of claim 9 , wherein the additive injection section is installed at a flow path connected from the cooling section to the cooling water storage section to inject the additive to condensate collected in the cooling water storage section.

12 . The passive safety facility of claim 7 , further comprising:
a condensate holding section installed between the cooling section and the cooling water storage section to collect the condensate falling from the cooling section so as to return it to the cooling water storage section.

13 . The passive safety facility of claim 12 , wherein the passive safety facility further comprises:
a return line extended from an outlet of the cooling section or the condensate holding section to the cooling water storage section to return condensate generated during the cooling process of the cooling section to the cooling water storage section.

14 . The passive safety facility of claim 13 , wherein the passive safety facility further comprises a filter facility connected to an outlet of the cooling section to filter out noncondensible gas discharged from the cooling section so as to collect radioactive materials filtered out from the noncondensible gas, and
the return line comprises: a first return line connected to a lower portion of the casing to form a flow path of the condensate collected in the casing; and a second return line connected to a lower portion of the filter facility to form a flow path of the condensate collected in the filter facility.

15 . The passive safety facility of claim 7 , wherein the passive safety facility further comprises a fluid circulation section configured to circulate the cooling water of the cooling water storage section to the circulation inducing jet device through the reactor coolant system or the steam generator, and
the fluid circulation section comprises: a fluid supply line connected to the cooling water storage section to supply cooling water within the cooling water storage section to the reactor coolant system or the steam generator; and a steam discharge line connected to the reactor coolant system or the steam generator and the circulation inducing jet device to supply the first fluid discharged from the reactor coolant system or the steam generator to the circulation inducing jet device.

16 . The passive safety facility of claim 1 , wherein the cooling section comprises:
a heat exchanger installed within the containment to allow the cooling water of the emergency cooling water storage section or atmosphere outside the containment to pass therethrough so as to exchange heat with the first fluid and the second fluid jetted from the circulation inducing jet device; and a

Assignees

• Korea Atomic Energy Res

Inventors

• Han Hun Sik
• Kim Young In
• Kang Kyung Jun
• Yi Sung Jae
• Kim Keung Koo
• Yun Ju Hyeon
• Ha Jae Joo
• Choi Suhn
• Park Cheon Tae
• Ryu Seung Yeob
• Moon Joo Hyung

Classifications

• G21C2015/185

  Physics · mapped topic

• G21C15/182 Primary

  comprising powered means, e.g. pumps · CPC title

• G21Y2004/30

  Physics · mapped topic

• G21C15/24

  Promoting flow of the coolant (electrodynamic pumps H02K44/02) · CPC title

• G21Y2002/20

  Physics · mapped topic