ML13094A076

Written Communication as Required by the University of Missouri Research Reactor Technical Specification 6.1.h(2) Regarding a Deviation from Technical Specification 5.4.a

ML13094A076
Person / Time
Site:	University of Missouri-Columbia
Issue date:	04/02/2013
From:	Rhonda Butler Univ of Mississippi
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML13094A076 (8)

Text

UNIVERSITY of MISSOURI RESEARCH REACTOR CENTER April 2, 2013 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Stop P1-37 Washington, D.C. 20555-0001

Subject:

Docket Number 50-186 University of Missouri-Columbia Research Reactor License R-103 Written communication as required by the University of Missouri Research Reactor Technical Specification 6.1.h(2) regarding a deviation from Technical Specification 5.4.a The attached document provides the University of Missouri-Columbia Research Reactor (MURR) Licensee Event Report (LER) for an event which was discovered on March 4, 2013 that resulted in a deviation from MURR Technical Specification 5.4.a.

If you have any questions regarding this report, please contact John L. Fruits, the facility Reactor Manager, at (573) 882-5319.

Sincerely, Ralph A. Butler, P.E.

Director RAB/djr Enclosure xc:

Reactor Advisory Committee Reactor Safety Subcommittee Dr. Robert V. Duncan, Vice Provost of Research Mr. Alexander Adams, Jr., U.S. NRC Mr. Craig Bassett, U.S. NRC ci11 liNE M.

ERRANUE Notabry i

Sealry b~tate Of Missonm o-CommIssioned for Boone oty M Commission Expires: Apu114, 2015 eComission Number: 11528381 1513 Research Park Drive Columbia, MO 65211 Phone: 573-882-4211 Fax: 573-882-6360 Web: wvww.murr.missouri.edu Fighting Cancer with Tomorrows Technology

Attachment U.S. Nuclear Regulatory Commission April 2, 2013 Licensee Event Report No. 13 March 4, 2013 University of Missouri Research Reactor Introduction On March 4, 2013, while reviewing a list of the completed maintenance items and compliance procedures performed that day, the Surveillance Programs System Specialist discovered that reactor compliance procedure CP-27, "Power Level Interlock Static Scram," was not completed within the prescribed Technical Specification (TS) periodicity. TS 5.4.a states "All instruments, as required by these specifications, shall be calibrated on semi-annual intervals." The maximum period allowed between calibration and testing intervals for semi-annual or greater intervals, as defined by TS 1.2, is the interval plus 2 months, which in this case is eight months. Compliance procedure CP-27 was previously completed on July 2, 2012, which would have required the semi-annual completion to be performed no later than March 2, 2013. Compliance procedure CP-27 was not completed within this time frame. The compliance procedure was performed on March 11, 2013; the next scheduled maintenance day after discovery of the error. Note:

"Compliance procedures" are used at MURR to fulfill the surveillance requirements of the TSs.

Description of Compliance Procedure CP-27, "Power Level Interlock Static Scram" The Power Level Interlock (PLI) scram is one of the safety system instrument channels required by TS 3.3.

The PLI scram provides assurance that the reactor cannot be operated with a power level greater than that authorized for the mode of operation as selected by the Mode Selector Switch. The PLI scram also provides the interlocks to assure that the reactor cannot be operated in Mode I with a pool or primary coolant flow scram bypassed. A copy of reactor compliance procedure CP-27, "Power Level Interlock Static Scram," is attached to this document.

Detailed Event Description On March 4, 2013, while reviewing a list of maintenance items and compliance procedures completed that day, the Surveillance Programs System Specialist discovered that reactor compliance procedure CP-27, "Power Level Interlock Static Scram," was not completed within the prescribed TS periodicity.

The Assistant Reactor Manager -

Operations was immediately informed and he subsequently notified the Reactor Manager.

The Reactor Manager verified all operational conditions, as confirmed by CP-27 for Mode I operation of the reactor, were satisfied:

1. The "10 MW" module for power range nuclear instrumentation channel 6 was installed;

2. Hi/Low Reflector D/P Bypass Switch 1S 20 was in the "OFF" position with the key removed;

3. Low Primary Pressure Bypass Switch 1S22 was in the "OFF" position with the key removed; Page 1 of 4

Attachment U.S. Nuclear Regulatory Commission April 2, 2013

4. WRM Selector Switch 1S2 was in the "10 MW" position;

5. Power Level Switch 1S8 was in the "10 MW" position;

6. Primary Coolant Flow Bypass Switch 2S41 was in the "10 MW" position; and

7. Pool Coolant Flow Bypass Switch 2S40 was in the "10 MW" position.

Had any of the above conditions not been in the proper position the reactor would not have been able to operate. Compliance procedure CP-27 was completed satisfactorily on the following scheduled maintenance day.

Compliance procedure CP-27 was originally scheduled on the Operations Maintenance Calendar to be completed on January 21, 2013; however, it was not transferred to the Maintenance List for that date. This omission was not discovered during the weekly maintenance meeting held on January 15, 2013 or during subsequent reviews of the maintenance list or completed maintenance items.

Safety Analysis The reactor is designed and licensed to operate in the following three modes:

1. Mode I - At power levels of up to 10 MW with the primary coolant system pressurized and at a flow rate of approximately 3,750 gpm, and a pool coolant flow rate of approximately 1,200 gpm; used when all heat exchange and pumping capacity is available;

2. Mode II - At power levels of up to 5 MW with the primary coolant system pressurized and at a flow rate of approximately 1,875 gpm, and a pool coolant flow rate of approximately 600 gpm; utilizing only half the design heat exchange and pumping capacity available; being the maximum operating power level at the time of initial startup; and

3. Mode III - At power levels of up to 50 kW with the primary coolant system open to the reactor pool, the reactor pressure vessel head removed, the flanged port open, and the pool water level at the elevation of either the upper or lower reactor bridge; used for core flux calibrations following the loading of a new core, or after a fuel rearrangement.

PLI consists of a series of contacts, relays and switches which ensure that the reactor operating mode is consistent with the designated relay logic for the selected mode. If the reactor power mode as selected by Power Level Switch 1S 8 is inconsistent with any of the established conditions, Pool Coolant Flow Bypass Switch 2S40, Primary Coolant Flow Bypass Switch 2S41, Low Primary Pressure Bypass Switch 1S22, Hi/Low Reflector D/P Bypass Switch 1S20, or the "10 MW" module for power range nuclear instrumentation channel 6, then the reactor safety system is unable to supply power to the control rod drive magnets and thus unable to operate.

Page 2 of 4

Attachment U.S. Nuclear Regulatory Commission April 2, 2013 TS 5.4.a states that "All instrumentation, as required by these specifications, shall be calibrated on semi-annual intervals."

The basis for this specification is "Semiannual calibration of the reactor instrumentation system channels will assure that long-term drift of the channels will be corrected."

Due to our operating schedule, MURR has not operated the reactor in any mode other than Mode I since completing a power uprate from 5 to 10 MW in 1974. Section 6.5.4.a of MURR operating procedure AP-RO-110, "Conduct of Operations," states "The reactor will be operated in Mode I only."

A reactor startup checksheet is required to be performed prior to operation of the reactor. During the performance of form FM-57, "Long Form Startup Checksheet," a licensed operator must ensure the following:

1. Power Level Selector Switch 1S8 is in the "10 MW" position; 2, Pool Coolant Flow Bypass Switch 2S40 is in the "10 MW" position;

3. Primary Coolant Flow Bypass Switch 2S41 is in the "10 MW" position;

4. All bypass switch keys (including Hi/Low Reflector D/P Bypass Switch 1S 20 and Low Primary Pressure Bypass Switch 1S 22) are removed; and 5, Power Range Monitor channel 6 is operational in accordance with OP-RO-312, "Nuclear Instrumentation - Power Range Monitor - Channel 6."

These items assure that the reactor does not have a pool or primary coolant flow scram bypassed and that the reactor is not operated with a power level greater than that authorized for the mode of operation (10 MW) selected on the Mode Selector Switch.

This operationally verifies the same conditions as CP-27 for Mode I (10 MW) operation only. However, the reactor operated outside the TS surveillance periodicity limits for a period of 9 days.

Corrective Actions Upon discovery, a comprehensive review of all compliance and preventive maintenance procedures was completed to ensure that all other surveillances had been completed within their prescribed periodicities. Additionally compliance procedure CP-27, "Power Level Interlock Static Scram," was completed satisfactorily on March 11, 2013.

Effective April 1, 2013, all compliance procedures have been entered and are being tracked with the computerized maintenance management software MAXIMO. A Work Order (WO) is automatically generated at the beginning of each month for each compliance procedure that is required to be completed during that month. The list of compliance procedure WOs is compared to the Operations Maintenance Calendar for accuracy.

On the fifth day of the following month a report is automatically generated by the MAXIMO system. This report lists all of the compliance procedure WOs completed the previous month with the corresponding completion dates, and also lists any outstanding compliance procedure WOs.

The report is automatically generated to all Assistant Reactor Managers and the Reactor Manager.

The Assistant Reactor Manager -

Page 3 of 4

Attachment U.S. Nuclear Regulatory Commission April 2, 2013 Operations must provide written documentation stating the reason each outstanding compliance procedure WO has not been completed along with the scheduled completion date to ensure it is completed within the prescribed periodicity. The Assistant Reactor Manger - Operations must sign the report and forward it to the Reactor Manager, who must also review and sign the report.

Each report will be filed by month with the completed compliance procedures.

This report is also automatically generated on the 15 th and the 2 5 th day of each month to ensure that multiple review points provide sufficient notification to schedule and complete any compliance procedures that remain outstanding from the previous month.

Additionally, this event has been entered into the MURR Corrective Action Program as CAP entry No. 13-0009 and any additional improvements or corrective actions will be considered.

If there are any questions regarding this LER, please contact me at (573) 882-5319. I declare under penalty of perjury that the foregoing is true and correct.

ENDORSEMENT:

Sincerely, Reviewed and Approved, John L. Fruits Ralph A. Butler, P.E.

Reactor Manager Director

Attachment:

Compliance procedure CP-27, "Power Level Interlock Static Scram" CHRISTINE M. ERRANTE M rPulc-Notary Sea[

sPtate of Missoud Commissioned for Boone County My Commission Expires: April 14, 2015 Comr..**."r.-

15 R38_

Page 4 of 4

NUMBER:

CP-27 COMPLIANCE CHECK PROCEDURE PAGE:

1 OF3 REVISION:

2/20/12 Compliance Check:

Frequency:

Semi-annually Power Level Interlock Static Scram Plant Conditions:

Number of Men Needed:

2 Reactor Shutdown Estimated Time:

90 minutes Test Equipment, Tools and Materials

1. Dummy Load Test Connectors

5.

50 KW Module

2.

Shorted Relays and Jumpers

6. 5 MW Module

3.

Bypass Keys

7.

Flat Tip Screw Driver

4.

Extension Cord References Technical Specification 3.3 Prints 139 and 42 Procedure

1.

Install Dummy Load Test Connectors.

2.

Instal '50 kW' module for NI Channel 6 as follows:

a.

Place Channel 6 drawer selector switch to 'ZERO.'

b.

Remove voltage regulator.

c.

Replace '10 MW' module with '50 kW' module.

d.

Install voltage regulator.

e. Place Channel 6 drawer selector switch to 'OPERATE.'

3.

Place WRM Selector Switch 1S2 to '50 kW BLACK' position or less.

4.

Install jumper G-2 (PT-943 & PT-944B-partial).

5.

Install jumper G-5 (PLI).

6.

Install jumper Y-3 (V509).

7.

Install jumper Y-4 (PT-944A).

8.

Install jumper Y-5 (PLI),

9.

Remove relay K-9 (FT-912G) and install shorted relay in K-9 position.

10. Remove relay K-25 (PS-938) and install shorted relay in K-25 position.

11. Remove relay K-30 (FT-912A) and install shorted relay in K-30 position.

12. Remove relay K-38 (FT-912E) and install shorted relay in K-38 position.

13. Remove relay K-61 (FIRST) and install shorted relay in K-61 position.

14. Remove relay K-62 (FIRST) and install shorted relay in K-62 position.

15. Place Hi/Low Reflector DP Scram Bypass Switch 1S20 to 'BYPASS' position (PT-917).

16. Place Low Primary Pressure Bypass Switch 1S22 to 'BYPASS' position (PT-943 & PT-944B).

17. Place Pool Coolant Flow Bypass Switch 2S40 to '50 kW' position.

18. Place Primary Coolant Flow Bypass Switch 2S41 to 'HX503A' position (FT-912H).

19. Place Power Level Switch 1S8 to '50 kW' position.

20. Reset NI Channel 6 drawer to clear nuclear instrument anomaly.

21. Place Master Control Switch 1S1 to 'ON' position.

22. Place Magnet Current Switch 1S14 to 'ON' position.

23. Reset scram TAAs.

24. Place Power Level Switch 1S8 to '5 MW' position.

25. VERIFY scram TAAs and magnet current to zero (2K19-13 & 14).

26. Place Power Level Switch 1S8 to '10 MW' position.

27. VERIFY scram TAAs will not reset (2K19-1 3 & 14).

28. Place Power Level Switch 1S8 to '50 kW' position.

29. Remove jumper G-2.

30. Install jumper G-1 (PT-917).

31. Reset NI Channel 6 drawer to clear nuclear instrument anomaly.

APPROVED'

,Aiictor ybnaber

NUMBER:

CP-27 COMPLIANCE CHECK PROCEDURE PAGE:

2 OF 3 REVISION:

2/20/12

32. Reset scram TAAs.

33. Place Power Level Switch 1S8 to '5 MW' position.

34. VERIFY scram TAAs and magnet current to zero (2K19-3 & 4).

35. Place Power Level Switch 1S8 to '10 MW'position.

36. VERIFY scram TAAs will not reset (2K19-3 & 4).

37. Place Power Level Switch 1S8 to '50 kW' position.

38. Reset NI Channel 6 drawer to clear nuclear instrument anomaly.

39. Remove jumper G-1.

40. Reset scram TAAs.

41. Place Hi/Low Reflector DP Scram Bypass Switch 1S20 to 'OFF' position.

42. VERIFY scram TAAs and magnet current to zero (1S20-1).

43. Place Hi/Low Reflector DP Scram Bypass Switch 1S20 to 'BYPASS' position.

44. Reset scram TAAs.

45. Place Low Primary Pressure Bypass Switch 1S22 to 'OFF' position.

46. VERIFY scram TAAs and magnet current to zero (1S22-3).

47. Place Low Primary Pressure Bypass Switch 1S22 to 'BYPASS' position.

48. Install jumper G4 (bypass green leg with exception of PLI).

49. Remove jumper G-5.

50. Remove jumper Y-5.

51. Reset scram TAAs.

52. OPEN solenoid test box located in Rooml14.

53. Plug temporary power to test power connection.

54. Place 529S AND 529H switches to 'Test' position. This will energize the solenoids and open V507A.

55. VERIFY scram TAAs and magnet current to zero (LS2-1 of 507A).

56. Place 529S AND 529H switches to 'Norm' position. This will de-energize the solenoids and close V507A.

57. Reset scram TAAs.

58. Place 529T AND 529F switches to 'TestI' position. This will energize the solenoids and open V507B.

59. VERIFY scram TAAs and magnet current to zero (LS2-1 of 507B).

60. Place 529T AND 529F switches to 'Norm' position. This will de-energize the solenoids and close V507B.

61. Unplug temporary power to test connection.

62. VERIFY all switches are in the 'Norm' position AND CLOSE the solenoid test box.

63. Reset scram TAAs.

64. Install jumper Y-1 3 to CLOSE Valve 543A.

65. VERIFY scram TAAs and magnet current to zero (LS2-1 of 543A).

66. Remove jumper Y-13 to OPEN Valve 543A.

67. Reset scram TAAs.

68. Install jumper G-15 to CLOSE Valve 543B.

69. VERIFY scram TAAs and magnet current to zero (LS2-1 of 543B).

70. Remove jumper G-1 5 to OPEN Valve 543B.

71. Place WRM Range Switch 1S2 to '5 MW BLACK' position.

72. Place Pool Coolant Flow Bypass Switch 2S40 to '10 MW' position.

73. Place Primary Coolant Flow Bypass Switch 2S41 to '10 MW' position.

74. Place Power Level Switch 1S8 to '5MW' position.

75.

Install '5 MW module for NI Channel 6 as follows:

a.

Place Channel 6 drawer selector switch to 'ZERO.'

b. Remove voltage regulator.

c.

Replace '50 kW' module with '5 MW' module.

d.

Install voltage regulator.

e. Place Channel 6 drawer selector switch to.'OPERATE.'

76. Reset NI Channel 6 drawer to clear nuclear instrument anomaly.

77. Install jumper Y-16 (DPS-929).

COMPLIANCE CHECK PROCEDURE NUMBER:

PAGE:

REVISION:

CP-27 3OF3 2/20/12

78.

Install jumper Y-15 (V507A/B PLI).

79.

Remove relay K-31 (FT-912F) and install shorted relay K-31.

80.

Reset scram TAAs.

81.

Place Pool Coolant Flow Bypass Switch 2S40 to '50 kW' position.

82.

VERIFY scram TAAs and magnet current to zero (2S40-6).

83.

Place Pool Coolant Flow Bypass Switch 2S40 to 'HX521A' position.

84.

Reset scram TAAs.

85.

Place Primary Coolant Flow Bypass Switch 2S41 to '50 kW position.

86.

VERIFY scram TAAs and magnet current to zero (2S41-10).

87.

Place Primary Coolant Flow Bypass Switch 2S41 to 'HX503A' position.

88.

Reset scram TAAs.

89.

Place WRM Range Switch 1S2 to '10 MW' position.

90.

VERIFY scram TAAs and magnet current to zero (1S2 Range Switch).

91.

Install '10 MW' module for NI Channel 6 as follows:

a. Place Channel 6 drawer selector switch to 'ZERO.'

b.

Remove voltage regulator.

c.

Replace '5 MW' module with '10 MW' module.

d.

Install voltage regulator.

e.

Place Channel 6 drawer selector switch to 'OPERATE.'

92.

Place Power Level Switch 1S8 to '10 MW' position.

93.

Place Pool Coolant Flow Bypass Switch 2S40 to '10 MW' position.

94.

Place Primary Coolant Flow Bypass Switch 2S41 to '10 MW' position.

95.

Reset NI Channel 6 drawer to clear nuclear instrument anomaly.

96, Reset scram TAAs.

97.

Place Pool Coolant Flow Bypass Switch 2S40 to 'HX521B' position.

98.

VERIFY scram TAAs and magnet current to zero (2S40-5).

99.

Place Pool Coolant Flow Bypass Switch 2S40 to '10 MW' position.

100. Reset scram TAAs.

101.

Place Primary Coolant Flow Bypass Switch 2S41 to 'HX503B' position.

102. VERIFY scram TAAs and magnet current to zero (2S41-9).

103. Place Primary Coolant Flow Bypass Switch 2S41 to '10 MW' position.

104. Place Master Control Switch 1S1 to 'OFF' position.

105. Place Magnet Current Switch 1S14 to 'OFF' position.

106. Remove bypass keys from 2S40 and 2S41.

107. Remove bypass key 1520.

108. Remove bypass key 1S22.

109. Remove jumper Y-16.

110. Remove jumper Y-15.

111.

Remove jumper Y-4.

112. Remove jumper Y-3.

113. Remove jumper G-4.

114. Remove shorted relay K-62 and install relay K-62.

115. Remove shorted relay K-61 and install relay K-61.

116. Remove shorted relay K-38 and install relay K-38.

117. Remove shorted relay K-31 and install relay K-31.

118. Remove shorted relay K-30 and install relay K-30.

119. Remove shorted relay K-25 and install relay K-25.

120. Remove shorted relay K-9 and install relay K-9.

121.

ENSURE all jumpers, bypass keys, shorted relays and Dummy Load Test Connectors are removed.

122. Log CP complete in Console Log Book and Maintenance Day Book.

I Date Completed:.

II LSRO Signature: