ML060930681

2005 Operations Report No. 58 for the Nbsr, January 1, 2005 - December 31, 2005

ML060930681
Person / Time
Site:	National Bureau of Standards Reactor
Issue date:	03/21/2006
From:	Gallagher P US Dept of Commerce, National Institute of Standards & Technology (NIST)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML060930681 (5)

Text

t ;UNITED STATES DEPARTMENT OF COMMERCE-1 National Institute of Standards and Technology Gaithersburg, Maryland 20899-VOICE (301) 975-6210 FAX (301) 975-9427 March 21, 2006 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Subject:

Docket #50-184 Gentlemen:

Transmitted herewith is Operations Report No. 58 for the NBSR. The report covers the period January 1, 2005 to December 31, 2005.Si ely, Patrick Gallagher Director, NIST Center for Neutron Research Enclosure cc: Thomas Dragoun, Senior Inspector U.S. Nuclear Regulatory Commission

-USNRC Region 1 475 Allendale Road King of Prussia, PA 19406-1415 U.S. Nuclear Regulatory Commission Attn: Marvin Mendonca 012-G13 Washington, DC 20555-0001 I4(.'c NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY REACTOR (NBSR)Docket #50-184 Facility License No. TR-5 Operations Report-- #58-January 1, 2005 -December 31, 2005 This report contains a summary of activities connected with the operations of the NBSR. It is submitted in fulfillment of section 7.8(3) of the NBSR Technical Specifica-tions and covers the period from January 1, 2005 to December 31, 2005.Section numbers in the report (such as 7.8(3)(a))

correspond to those used in the Technical Specifications.

Marc914 Patrick Gallagher Director, NIST Center for Neutron Research TABLE OF CONTENTS 7.8(3)(a)

Summary of Plant Operations 7.8(3)(b)

Unscheduled Shutdowns 7.8(3)(c)

Tabulation of Major Items of Plant Maintenance 7.8(3)(d)

Tabulation of Major Changes in the Facility and Procedures, and the Test and Experiments, Carried Out Without Prior Approval by the NRC Pursuant to 10 CFR 50.59 7.8(3)(e)

Summary of Radioactive Material Released and Results of Environmental Surveys Performed 7.8(3)(f)

Summary of Significant Exposures Received by Facility Personnel and Visitors 2005 Operations Report for NBSR (TR-5)[Docket #50-1841 Page 1 7.8(3)(a)

Summary of Plant Operations During the period January 1, 2005 through December 31, 2005 the reactor was critical for 5941 hours0.0688 days <br />1.65 hours <br />0.00982 weeks <br />0.00226 months <br /> with an energy output of 118,491 MWH. Major activities during this period included:

inspection of electrical switchboards; replacement of D 2 0 with H 2 0 in the Thermal Column Tank Cooling System; and licensing of a new senior reactor operator.7.8(3)(b)

Unscheduled Shutdowns 1. There were 2 scrams due to commercial power interruptions.

A return to 20 MW was made within an hour of each scram.2. A scram was caused by excessive vibration of a remote scram button during a maintenance activity.

A return to 20 MW was made within an hour of the scram.3. A reactor shutdown was caused by the faulty performance of a critical power uninterruptible power supply (UPS). A-spare UPS was placed into service and a return to 20 MW was made within an hour of the shutdown.7.8(3)(c)

Tabulation of Major Items of Plant Maintenance Note: Some of these items may be also listed as Engineering Change Notices (ECN).1. Replaced all D 2 0 in the Thermal Column Tank Cooling System with H 2 0.2. Replaced three secondary cooling pumps and associated valves.3. Replaced both fans, controllers, and instrumentation in the confinement building basement ventilation system.4. Removed RT-2 fast rabbit assembly.5. Performed a thermographic inspection of electrical switchboards.

6. Instrument calibration surveillance tests were performed for the following:

Three Wide-range Nuclear Power Channels Reactor Vessel Flow and Level Recorders and Indicators Two Reactor Differential Temperature Channels Confinement Building Area Radiation Monitors Fission Product Monitors and Secondary Cooling N 1 6 Monitors Three Confinement Building Effluent Monitors Emergency Ventilation System Controllers 2005 Operations Report for NBSR (TR-5)[Docket #50-184]Page 2

13. Forty-one instrument service requests (ISR) were completed, including:

ISR # ACTION 1687 Replaced detector tube in RM 3-1 Secondary System NW 6 monitor.1703 Replaced indicator for Shim 1.1712 Repaired faulty period scram circuit with replacement of relay in NC-7 channel.1716 Replaced detector tube in RM 3-2 Fission Products radiation monitor.1722 Replaced transmitter electronics for FIA-BA/B Cold Source D20 Flow.7.8(3)(d)

Tabulation of Major Changes In the Facility and Procedures, and Tests and Experiments, Carried Out Without Prior Approval by the NRC pursuant to 10 CFR 50.59.The following facility changes were completed this year. None required a license amendment or a change to the technical specifications, and there were no changes made pursuant to the applicable criteria of410 CFR 50.59.475 Change Thermal Column Tank Heavy Water to Light Water.7.8(3)(e)

Summary of Radioactive Material Released and Results of Environmental Surveys Performed.

Gaseous releases consisted of 787 curies of tritium, 1163 curies of Argon-41, and 0.340 curies of other beta-gamma emitters.

There were 4.75 curies of tritium and 1.0 millicuries of other beta-gamma emitters released into the sanitary sewer.Environmental samples of the streams, vegetation, and/or soil, and air showed no significant changes.7.8(3)(f)

Summary of Significant Exposures Received by Facility Personnel and Visitors.1. None to visitors.2. Dosimetry results for this reporting period indicated that no facility personnel received any significant exposures.

2005 Operations Report for NBSR (TR-5)[Docket #50-184]Page 3