LIC-14-0115, Special Report on Inoperability of Containment Accident Radiation Monitor RM-091A/B for Post Accident Monitoring

Special Report on Inoperability of Containment Accident Radiation Monitor RM-091A/B for Post Accident Monitoring

ML14269A365
Person / Time
Site:	Fort Calhoun
Issue date:	09/25/2014
From:	Cortopassi L Omaha Public Power District
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
LIC-14-0115
Download: ML14269A365 (2)

Text

444 South 16th Street Mall Omaha, NE 68102-2247 10 CFR 50.36(c)(8)

LIC-14-0115 September 25, 2014 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Fort Calhoun Station, Unit No. 1 Renewed Facility Operating License No. DPR-40 NRC Docket No. 50-285

Subject:

Special Report on Inoperability of Containment Accident Radiation Monitor RM-091A/B for Post Accident Monitoring The Omaha Public Power District (OPPD) submits this report pursuant to the requirements of Fort Calhoun Station (FCS) Technical Specification (TS) 2.21, "Post Accident Monitoring Instrumentation." TS 2.21, Table 2-10, specifies the minimum operable channels for several post accident monitoring instruments. If the required instrumentation is not operable, then the appropriate actions specified in Table 2-10 are to be taken.

TS 2.21, Table 2-10, item 1, specifies a minimum of two (2) operable channels for the Containment Wide Range Radiation Monitors, RM 091A & B.

Footnote (a) of Table 2 10 states:

(a) With the number of OPERABLE channels less than required by the minimum channels operable requirements, initiate the pre-planned alternate method of monitoring the appropriate parameter(s) within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, and

1. either restore the inoperable channel(s) to OPERABLE status within 7 days of the event, or

2. prepare and submit a special report to the Commission pursuant to specification 5.9.3 within 14 days following the event outlining the action taken, the cause of the inoperability, and the plans and schedules for restoring the system to OPERABLE status.

During an NRC inspection it was noted the TS required surveillance (table 3-3) for these monitors states, in part:

Secondary and Electronic calibration performed at refueling frequency. Primary calibration with exposure to radioactive sources only when required by the secondary and electronic calibration.

RM-091 A/B - Calibration by electronic signal substitution is acceptable for all range decades above 10 R/hr. Calibration for at least one decade below 1-R/hr. shall be by means of calibrated radiation source.

NRC FORM 366 (10-2010)

U.S. Nuclear Regulatory Commission LIC-14-0115 Page 2 Monitors RM-091A/B are high range monitors and do not read below 1R/hr, making it impossible to comply with the surveillance requirement. Since the required TS surveillance cannot be completed the instruments have been conservatively declared inoperable. This error was introduced by a change to TS was made in the early 1990s. It appears on review of the documentation submitted on this change that the requirement should be 1OR/Hr not 1-R/Hr.

Since the duration of the inoperability of RM-091 A&B has exceeded seven days, this special report is required. OPPD has implemented a pre-planned alternate method for monitoring the appropriate parameters.

A change toTS is being processed. It is anticipated the request for a change to the TS will be submitted by December 19, 2014.

There are no new commitments being made in this letter. If you should have any questions, please contact Terrence W. Simpkin, Manager, Site Regulatory Assurance, at (402} 533-6263.

"""' ouis P. Cortopassi Site Vice President and CNO LPC/epm c: M. L. Dapas, NRC Regional Administrator, Region IV C. F. Lyon, NRC Senior Project Manager S.M. Schneider, NRC Senior Resident Inspector NRC FORM 366 (02-2014)