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Monday, July 27, 2020 | History

1 edition of Reactor coolant pump seal related instrumentation and operator response found in the catalog.

Reactor coolant pump seal related instrumentation and operator response

Reactor coolant pump seal related instrumentation and operator response

an evaluation of adequacy to anticipate potential seal failures

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  • 34 Currently reading

Published by Division of Safety Review and Oversight, Office of Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission in Washington, DC .
Written in English

    Subjects:
  • Nuclear reactors -- Safety measures.,
  • Nuclear reactors -- Materials -- Testing.,
  • Sealing compounds.

  • Edition Notes

    Statementprepared by W.J. Luckas ... [et al.].
    ContributionsLuckas, W. J., U.S. Nuclear Regulatory Commission. Office of Nuclear Reactor Regulation. Division of Safety Review and Oversight., Brookhaven National Laboratory., Chalk River Nuclear Laboratories.
    The Physical Object
    Pagination1 v. (various pagings) :
    ID Numbers
    Open LibraryOL15338375M

    Main-Coolant-Pump Shaft-Seal Guidelines. Volume 2. Operational Guidelines., NP, Volume 2 Research Project Final Report, March Prepared by BORG-WARNER CORPORATION Byron Jackson Pump Division Energy Systems Development Center Adria Maru Lane Carson, California Principal Investigators C. E. Fair A. 0. Greer liTiiE '://metadc/m2/1/high_res_d/pdf.   The reactor coolant pump is vertical, single stage, centrifugal pump to pump large volumes of reactor coolant at high temperature and pressure. 3. The pump consists of three sections from bottom to top: the hydraulic section, the shaft seal section and the motor  › 百度文库 › 语言/资格考试.

      When the intact SG emptied, operator was redirected to ECA (SGTR with Loss of Reactor Coolant - Subcooled Recovery Desired), and used ruptured SG for further plant cooldown. Till the end of the calculation, at sec, there has been no complete loss secondary heat sink ://   System performance was proven by extensive testing approved by the NRC - Condensation - Evaporation - Reactor Vessel - Steam Generators - Turbine 9 AP Design Overview Typical PWR safety active systems and safety support systems exist  › 百度文库 › 互联网.

      Reactor Coolant Pump (RCP) stand-still seal system, back-up for normal seal system Double-wall containment with steel liner Following twofold safety approach is applied in EPR design: To improve the preventive measures against accidents. To mitigate Severe Accidents consequences, even if their probability has TR-EPRWG.    Pump Failures Valve Operator Failures Controller Failures CVCS LERs Potential Safety-Related Pump Loss control reactor coolant chemistry, and letdown and charging flow. In many plants, the charging pumps


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Reactor coolant pump seal related instrumentation and operator response Download PDF EPUB FB2

Get this from a library. Reactor coolant pump seal related instrumentation and operator response: an evaluation of adequacy to anticipate potential seal failures. [W J Luckas; U.S. Nuclear Regulatory Commission. Office of Nuclear Reactor Regulation.

Division of Safety Review and Oversight.; Brookhaven National Laboratory.; Chalk River Nuclear Laboratories.;]   1. State the purposes of the reactor coolant pump (RCP). Describe the flow paths through the RCP.

Explain how the RCP seal minimizes leakage of t l t t th t i t b ildif reactor coolant to the containment building atmosphere. State the safety-related function of the RCP motor ://   @article{osti_, title = {Impact of mechanical- and maintenance-induced failures of main reactor coolant pump seals on plant safety}, author = {Azarm, M A and Boccio, J L and Mitra, S}, abstractNote = {This document presents an investigation of the safety impact resulting from mechanical- and maintenance-induced reactor coolant pump (RCP) seal failures in nuclear power :// @article{osti_, title = {Technical findings related to Generic Issue Reactor coolant pump seal failure}, author = {Ruger, C.

and Luckas, Jr., W. J.}, abstractNote = {Reactor coolant pumps contain mechanical seals to limit the leakage of pressurized coolant from the reactor coolant system to the containment.

These seals have the potential to leak, and a few have degraded and even   In addition, we have reviewed the recommendations of NUREG/CR, "Reactor Coolant Pump Seal Related Instrumentation and Operator Response," and the draft Regulatory Guide DG, "Reactor Coolant Pump Seals." The current Surry instrumentation and procedures are slightly different from the recommendations in the f/00, I ( The reactor coolant pump is the key equipment of the first loop in nuclear power plant, and the shaft seal is the most important component.

The reliability of the shaft seal under various operating conditions directly affects the safe operation of the reactor coolant pump and the ://   The U.S. Nuclear Regulatory Commission (NRC) amended its regulations in 10CFR50 with the addition of a new section,[open quotes]Loss of All Alternating Current Power.[close quotes] The objective of these requirements is to ensure that all @article{osti_, title = {Reactor coolant pump transportation incident}, author = {Noce, D.}, abstractNote = {This paper reports on an incident, which occurred on Augin which a Reactor Coolant Pump motor en route from Surry Power Station to Westinghouse repair facilities struck the overpass at the junction of Interstate 64 and Jefferson Avenue in Newport News, ://   Perform an evaluation of the potential for and impact of reactor coolant pump seal damage following small-break LOCA with loss of offsite power.

If damage cannot be precluded, provide an analysis of the limiting small-break loss-of-coolant accident with subsequent reactor coolant pump seal damage.

[II.K.2(16) and II.K.3(25)] Response   The reactor coolant pumps circulate reactor coolant through the reactor vessel to the steam generators for heat removal and return it to the reactor vessel.

The pump is a single-stage centrifugal unit of vertical type, which horse power. To assure leak-tightness of the shaft, the mechanical seal   The Reactor Coolant System consists of major components other than the reactor, such as steam generator, reactor coolant pump, pressurizer, and related pipings linking the equipments.

For SMRs, the structure and functions of pressurizer and pipings are relatively simple and they are mostly settled into the integrated pressure ://   Assessment is performed using the one-dimensional multi-dimensional analysis of reactor safety (MARS-KS) system code by evaluating the plant response over an assumption of only one TDP-DC available.

The test has been conducted for two conditions: SBOs with/without a reactor coolant pump (RCP) seal loss-of-coolant-accident (LOCA). bearing and enters the No. 1 seal. Above the No. 1 seal, most of the flow leaves the pump through the No. 1 seal leakoff line and returns to the chemical and volume control system.

Minor flow passes through the No. 2 seal and its leakoff line to the reactor coolant drain tank. A back flush injection of liters [ gallons] per hour from a Westinghouse reactor coolant pump seal (RCP) technology is used by approximately 50% of the global nuclear fleet.

Since developing the first hydrostatic RCP seals in the s, Westinghouse has   Comments on Generic Is "Reactor Coolant Pump Seal Failure": and Draft Regulatory Guide; Issuance, Availability EASYLINK +11/'97 59/ S rq IMA { aU The NRC solicited comments on Generic Issue (GI), "Reactor Coolant Pump Seal Failures" in the Federal Register (56 FR ) dated Ap Three Mile Island: In at Three Mile Island in USA a cooling malfunction caused part of the (TMI 2) core to melt.

The reactor was destroyed but there were no injuries or adverse health effects from the Three Mile Island accident. Some radioactive gas was released a couple of days after the accident, but not enough to cause any dose above background :// When seal injection is lost, seal flow is supplied by reactor coolant leaking up along the pump shaft.

Causes a loss of RCS inventory. Reactor coolant is not as clean as seal injection, potentially causing debris clogging the seals. Reactor coolant is at higher temp (> °F) and must be cooled by the thermal barrier heat ://   I&M Response to Question 1 Each of the reactor coolant pump (RCP) No.

1 seal leak-off lines is provided with both low range (0 to 1 gpm) and high-range (0 to 6 gpm) flow instrumentation. The loop consists of a transmitter, an annunciator, a recorder, and the plant process computer.

Since the   the reactor nitrogen blowers must be in operation, emergency controls of the MCC must be checked, fuel channel flow-rate meters must be activated and their readings recorded. B) At least two main coolant pumps (MCP) must be turned on, their flow rates must reach to m 3 /s ( m 3 /h) with throttle-control on each The Westinghouse Sigma™ Reactor Coolant Pump Seal provides reliable performance and cost savings to Raymond Spornhauer liked this Today’s instrumentation and control (I&C) technologies are.

Safety-related instrumentation installed in a nuclear power plant is primarily designed and qualified for preventing and mitigating accidents that have a severity less than or equal to the severity of a design-basis accident. and (7) status of the reactor coolant pump (RCP) seal cooling.

of category 3 instruments Self powered neutron   Reactor coolant pump seal injection and leakoff at PWRs is not considered leakage for plant technical specification purposes, although such leakoff typically satisfies the definition of identified leakage. Reactor coolant pump seals are commonly designed  › 百度文库 › 行业资料.J.

Moore, in Fundamentals and Applications of Supercritical Carbon Dioxide (sCO₂) Based Power Cycles, Instrumentation. Much of the instrumentation requirements for sCO 2 systems are similar to those for other high-pressure systems, but there are some unique challenges associated with the combination of high temperature and high fluid density.

Many systems utilize compression