-
公开(公告)号：US20180322970A1
公开(公告)日：2018-11-08
申请号：US16029786
申请日：2018-07-09
Applicant: HOLTEC INTERNATIONAL
Inventor： Krishna P. SINGH , John D. GRIFFITHS , Joseph A. MECKLEY , Stephen J. AGACE
Abstract: A method of forming a sealed canister and a method of storing radioactive materials is provided. The method of forming includes placing a top plate on a top opening of a side wall, a bottom of the side wall being sealed to a base plate. The top plate includes a top surface with a top edge having a bevel and with a channel set in from the top edge. Finally, a weld is formed between the beveled top edge and the top opening of the side wall to seal the top plate to the side wall.
-
22.发明申请公开(公告)号：US20140317952A1
公开(公告)日：2014-10-30
申请号：US14288045
申请日：2014-05-27
Applicant: Holtec International, Inc.
Inventor： Krishna P. SINGH
IPC: G21F5/005
CPC classification number: G21F5/005 , F26B5/04 , F26B21/006 , F26B21/08 , F26B21/14 , G21C19/32 , G21F5/008 , G21F9/28
Abstract: A system and method for drying cavities containing spent nuclear fuel is devised. The invention utilizes a non-intrusive procedure that is based on monitoring the dew point temperature of a non-reactive gas that is circulated through the cavity, in one aspect, the invention is a system for drying a cavity loaded with spent nuclear fuel comprising: a canister forming the cavity, the cavity having an inlet and an outlet; a source of non-reactive gas; means for flowing the non-reactive gas from the source of non-reactive gas through the cavity; and means for repetitively measuring the dew point temperature of the non-reactive gas exiting, the cavity,
Abstract translation: 设计了一种用于干燥包含乏核燃料的空腔的系统和方法。 本发明利用基于监测通过空腔循环的非反应性气体的露点温度的非侵入性方法，一方面，本发明是用于干燥装载有废核燃料的空腔的系统，包括： 形成所述腔的罐，所述空腔具有入口和出口; 非反应性气体来源; 用于使非反应性气体从非反应性气体源流过空腔的装置; 以及用于重复测量离开所述空腔的非反应性气体的露点温度的装置，
-
23.发明申请SYSTEM AND METHOD FOR THE VENTILATED STORAGE OF HIGH LEVEL RADIOACTIVE WASTE IN A CLUSTERED ARRANGEMENT 有权集群安排中高水平放射性废物通风储存的系统和方法公开(公告)号：US20140169515A1
公开(公告)日：2014-06-19
申请号：US14189093
申请日：2014-02-25
Applicant: Holtec International
Inventor： Krishna P. SINGH , Stephen J. AGACE
CPC classification number: G21F7/015 , B66C19/00 , G21Y2002/301 , G21Y2002/303 , G21Y2002/60 , G21Y2004/30
Abstract: A system for receiving and storing high level radioactive waste comprising: an enclosure comprising walls having inlet ventilation ducts, a roof comprising an array of holes, and a floor; an array of metal shells located in an internal space of the enclosure, the array of metal shells being co-axial with the array of holes in the roof so that containers holding high level radioactive waste can be lowered through the array of holes in the roof and into the array of metal shells; the array of metal shells acting as load bearing columns for the roof; and each of the metal shells comprising (i) an expansion joint for accommodating thermal expansion and/or contraction of the metal shells; and (ii) one or more holes at a bottom portion of the metal shell.
Abstract translation: 一种用于接收和存储高放射性废物的系统，包括：包括具有入口通风管道的壁的外壳，包括孔阵列的屋顶和地板; 位于外壳内部空间中的金属壳阵列，金属壳阵列与屋顶中的孔阵列同轴，使得容纳高放射性废物的容器能够通过屋顶中的孔阵列降低 并进入金属壳阵列; 作为屋顶承载柱的金属壳阵列; 并且每个金属壳包括（i）用于容纳金属壳的热膨胀和/或收缩的膨胀接头; 和（ii）金属壳底部的一个或多个孔。
-
公开(公告)号：US20250062712A1
公开(公告)日：2025-02-20
申请号：US18939701
申请日：2024-11-07
Applicant: HOLTEC INTERNATIONAL
Inventor： Krishna P. SINGH , Indresh RAMPALL , Edward BELL
Abstract: A hybrid solar energy power generation system includes a thermal energy storage (TES) vessel containing a thermal mass composition operable to store thermal energy, a concentrated solar power (CSP) system, and a photovoltaic (PV) power system. The CSP system heats a first working fluid flowing in first closed flow loop via a solar collector. The heated first working fluid recirculates through the TES vessel to heat the TM composition. The PV power system generates electricity which can be delivered directly to the electric power grid or alternatively when grid demand drops energizes can electric heaters to supplement heating the first working fluid. This increases the temperature and enthalpy of the first working fluid to store additional thermal energy in the TM composition. The TES vessel is operable to heat a second working fluid to produce steam usable for industrial processes, district heating, or to power a Rankine power generation cycle.
-
25.发明公开公开(公告)号：US20240233968A1
公开(公告)日：2024-07-11
申请号：US18406873
申请日：2024-01-08
Applicant: Holtec International
Inventor： Krishna P. SINGH , Indreash Rampall
CPC classification number: G21D1/006 , F01K7/16 , F05D2230/80
Abstract: A power generation system and related method for repowering a fossil-fueled power plant using a carbon-free nuclear steam supply system (NSSS) which replaces the existing fossil plant steam generator which burns fossil fuel such as coal, oil, or natural gas. The existing fossil plant energy conversion system including the turbine-generator (turbogenerator) and auxiliary components of the Rankine cycle is retained. The NSSS may include a small modular reactor (SMR) unit comprising a reactor vessel with nuclear fuel core and steam generator which receives heated primary coolant from the reactor to produce main steam to operate the Rankine cycle. The main steam output by the SMR unit is compressed in a steam compressor to increase its pressure to a level necessary to operate the turbogenerator. The compressor may be operated via a portion of the main steam. An intercooler of the compressor may be used for main steam reheating.
-
Patent Agency Ranking
公开(公告)号：US20240212873A1
公开(公告)日：2024-06-27
申请号：US18425329
申请日：2024-01-29
Applicant: Holtec International
Inventor： Krishna P. SINGH , John D. Griffiths , Stephen J. Agace , Joseph A. Meckley
CPC classification number: G21F5/008 , B23K9/0026 , G21F5/005 , G21F5/10 , G21F5/12 , G21F9/34 , G21F9/36 , B23K2101/12 , B23K2101/125
Abstract: A container system for radioactive waste and method for using the same is provided. The system includes a canister configured for holding radioactive waste and a lid system. In one embodiment, the lid system comprises a two-part lid assembly including a confinement lid and a shielded lifting lid. The confinement lid is detachably mounted to the confinement lid. In use, the lifting lid supports the confinement lid for lifting and placement on the canister. The lifting lid further shields operators while the confinement lid is mounted to the canister. Thereafter, the lifting lid is removed and may be reused for confinement lid mountings on other canisters. In one embodiment, the confinement lid is bolted to the canister. The canister may be disposed in a protective overpack for transport and storage.
-
公开(公告)号：US20240127979A1
公开(公告)日：2024-04-18
申请号：US18381466
申请日：2023-10-18
Applicant: Holtec International
Inventor： Krishna P. SINGH , Venkat PRABHALA
Abstract: An impact amelioration apparatus and system comprising a stationary impact limiter containing a deformable impact-cushioning material that can be used as a kinetic energy-absorbing target against a free falling radioactive waste-laden vessel such as a nuclear waste storage and/or transport cask. In one embodiment, the cushioning material may be one or more layers of pervious concrete encased in a metal outer container, which may be hermetically-sealed in some embodiments. The pervious concrete is crushable upon impact by an accidentally dropped free-falling cask to safely decelerate the cask while preserving the structural radiation containment envelope of the cask to prevent release of radiation to the ambient environment. The stationary impact limiter may located on a support surface in an equipment loading area of a nuclear facility, such as a nuclear power generation plant, beneath an overhead lifting apparatus used to move equipment such as casks into and out of the facility.
-
公开(公告)号：US20240093950A1
公开(公告)日：2024-03-21
申请号：US18239949
申请日：2023-08-30
Applicant: HOLTEC INTERNATIONAL
Inventor： Krishna P. SINGH
IPC: F28D20/02
CPC classification number: F28D20/021 , F28D2020/0013
Abstract: A green boiler includes a thermal energy storage vessel containing a captive bed of a thermal mass composition operable to store thermal energy, an array of heaters embedded in the mass, and at least one heat exchanger comprising a tube bundle. The heaters in one embodiment may be electric and coupled to an electric power source to heat the thermal mass. The tube bundle comprises tubes embedded in the thermal mass composition which are configured to convey heat transfer fluid (e.g., water or other) through a tube-side of the tubes. In operation, the heat transfer fluid is heated by absorbing stored thermal energy from the thermal mass composition. The thermal mass composition may be heated by power extracted from the power grid during off-peak demand periods in some embodiments. The vessel may produce heated water or steam for district heating, or steam for power generation or industrial uses.
-
公开(公告)号：US20240013944A9
公开(公告)日：2024-01-11
申请号：US17977342
申请日：2022-10-31
Applicant: Holtec International
Inventor： Krishna P. SINGH
Abstract: A dry storage systems for radioactive nuclear waste materials may include a double-walled canister system. The canister system may include a canister having a tubular inner shell defining an internal cavity for storing nuclear waste material, a first lid sealably welded to a first end of the inner shell, a primary base plate defining a peripheral edge portion and having an annular closure flange, and an annular full thickness butt weld formed at an abutment joint between the annular closure flange and a second end of the inner shell. The inner shell, first lid, and first end closure may collectively define a sealed primary pressure retention barrier. A tubular outer shell may adjoin the inner shell. The outer shell may be welded to the canister to form a hermetically sealed secondary pressure retention barrier.
-
公开(公告)号：US20230016181A1
公开(公告)日：2023-01-19
申请号：US17725969
申请日：2022-04-21
Applicant: HOLTEC INTERNATIONAL
Inventor： Krishna P. SINGH
Abstract: A nuclear fuel decay heat utilization system usable for space heating in one embodiment comprises a nuclear generation plant building housing a spent fuel pool containing submerged fuel assemblies which emit decay heat that heats the pool. Plural fluidly isolated but thermally coupled heat removal systems comprising pumped flow loops operate in tandem to absorb thermal energy from the heated pool water, and transfer the thermal energy through the systems in a cascading manner form one to the next to a final external heat sink outside the plant building from which the heat is rejected to the ambient environment. A programmable controller operably regulates the intake and flowrate of water from the heat sink into the heat removal systems and monitors ambient air temperature inside to building. The flowrate is regulated to maintain a preprogrammed building setpoint air temperature by increasing fuel pool water temperature to a maximum permissible limit.
-
-
-
-
-
-
-
-
-
Search Results
77
records
(took 0.029 seconds)
