NL-09-085, Report on Inoperable Auxiliary Feedwater Flow Monitor

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Report on Inoperable Auxiliary Feedwater Flow Monitor
ML091810704
Person / Time
Site: Indian Point Entergy icon.png
Issue date: 06/22/2009
From: Robert Walpole
Entergy Nuclear Indian Point 3
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-09-085
Download: ML091810704 (2)


Text

Indian Point Energy Center 450 Broadway, GSB

_P.O. Box 249

=bJ2,fter J Buchanan, N.Y. 10511-0249 Tel (914) 734-6700 Robert Walpole Licensing Manager 914-734-6710 June 22, 2009 NL-09-085 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

SUBJECT:

Report on Inoperable Auxiliary Feedwater Flow Monitor Indian Point Unit Number 3 Docket No. 50-286 License No. DPR-64

Dear Sir or Madam:

The purpose of this letter is to submit a report pursuant to Technical Specification (TS) 5.6.7.

Steam Generator (SG) Water Level (Wide Range) and Auxiliary Feedwater (AFW) Flow are required by TS 3.3.3, Table 3.3.3-1, Function 14 to have one each operable per steam generator in Modes 1, 2, and 3. AFW monitor F1202 was declared inoperable on May 15, 2009. TS Condition A was entered and expired on June 14, 2009. Condition B requires this report in 14 days. Pursuant to TS 5.6.7, the report is to outline the alternate method of monitoring, the cause of the inoperability, and the plans and schedule for restoring the instrument to operable status.

  • Alternate method of monitoring Each SG has one wide range level transmitter that spans a range from the tube sheet up to the moisture separator. The wide range SG water level is a RG 1.97 Type A variable used to determine if the SG water level is adequate post accident. The SG wide range monitor and the AFW flow instrumentation are credited for providing the redundant instrumentation for each SG. For SG 33 this is wide range level transmitter LT-437D and AFW flow instrument F1202. During the period F1202 was inoperable the wide range monitor LT-437D was the alternate means of monitoring.
  • Cause The FT-1202 did not behave properly for the given plant conditions during the shutdown on May 15, 2009 and FT-1202 was declared inoperable. During further instrumentation testing, the flow transmitter failed the static alignment test. No additional evaluation was performed and the failed calibration was the cause for instrument replacement.

NL-09-085 Docket 50-286 Page 2 of 2

  • Plans and schedule for restoring A replacement transmitter was obtained, calibrated, and installed on June 3, 2009. The flow instrument was monitored for behavior and returned to service on June 15, 2009.

There are no new commitments being made in this submittal.

Ifyou have any questions or require additional information, please contact Mr. Robert Walpole, Licensing Manager.

Sincerely, RW/sp cc: Mr. John P. Boska, Senior Project Manager, NRC NRR Mr. Samuel J. Collins, Regional Administrator, NRC Region I NRC Senior Resident Inspectors Office Mr. Francis J. Murray, Jr., President and CEO, NYSERDA Mr. Paul Eddy, New York State Dept. of Public Service