United States Nuclear Regulatory Commission - Protecting People and the Environment
Home > NRC Library > Document Collections > Reports Associated with Events > Event Notification Reports > 2019 > March 22

Event Notification Report for March 22, 2019

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
3/21/2019 - 3/22/2019

** EVENT NUMBERS **


53846 53931 53932

To top of page
Part 21 Event Number: 53846
Rep Org: ENGINE SYSTEMS, INC
Licensee: ENGINE SYSTEMS, INC
Region: 1
City: Rocky Mount   State: NC
County:
License #:
Agreement: Y
Docket:
NRC Notified By: DAN ROBERTS
HQ OPS Officer: JEFFREY WHITED
Notification Date: 01/24/2019
Notification Time: 17:15 [ET]
Event Date: 12/06/2018
Event Time: 00:00 [EST]
Last Update Date: 03/21/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21(a)(2) - INTERIM EVAL OF DEVIATION
Person (Organization):
GERALD MCCOY (R2DO)
HIRONORI PETERSON (R3DO)
- PART 21/50.55 REACTORS (EMAIL)

Event Text



EN Revision Imported Date : 3/22/2019

EN Revision Text: PART 21 - POTENTIAL DEFECT IN VICKERS VOLTAGE REGULATOR SYSTEM

The following summary was provided in the Part 21 report:

"ESI [Engine Systems Inc.] was notified on December 6, 2018 of a potential issue with saturable reactors (also referred to as magnetic amplifiers) supplied to Monticello Nuclear Generating Plant. ESI provided the reactors as like-for-like replacements for the existing magnetics of the original Vickers voltage regulator and static exciter. During system testing performed by Monticello at another vendor facility, issues with the static excitation system were identified which prevented proper control of the generator field current. Troubleshooting identified several potential causes and ESI believes there may be a potential deficiency in the saturable reactor, P/N 8408218-ESI.

"This component is integral to operability of the Vickers style voltage regulator and static exciter systems used on many emergency diesel generator sets in the nuclear industry. A deficiency in the reactor would adversely affect the ability to control generator output voltage and therefore adversely affect emergency diesel generator set performance.

"ESI is in the process of performing additional testing and analysis at the transformer manufacturer's facility to determine if a deficiency exists in this component. ESI is unable to complete an evaluation within the 60-day requirement."

ESI has supplied the part to NRC licensees but, to ESI's knowledge, none of the components have been installed. ESI is notifying each customer and advising not to install the reactors until the evaluation is complete.

This Part 21 Report affects the following licensees:
Surry Power Station
Turkey Point Nuclear Generating Station
Monticello Nuclear Generating Station

Point of Contact: Dan Roberts
Telephone: 525-977-2720
Fax: 252-446-1134
175 Freight Road, Rocky Mount, NC 27804

* * * UPDATE ON 3/21/19 AT 1448 EST FROM DAN ROBERTS TO JEFFREY WHITED * * *

The following is a summary of the information provided by the vendor via fax:

On January 24, 2019, Engine Systems Inc. (ESI) issued interim report 10 CFR 21-0124-INT, rev.0 regarding an identified deviation for which ESI was unable to complete an evaluation within the 60-day requirement. Per the interim report, ESI committed to complete the evaluation by March 22, 2019. The evaluation is now complete and the deviation is determined to be reportable in accordance with 10 CFR Part 21.

Identification of the basic component supplied within the United States which fails to comply or contains a defect and nature of the defect:

Part Number (P/N) 8408213-ESI: Power Current Transformer - Insufficient core gap.
P/N 8408218-ESI: Saturable Reactor - Differences in coil winding and core lamination from original design.
P/N 8411387-ESI: Excitation Power Transformer - Incorrect polarity

Each of the devices listed above provide a specific function within the static exciter of a Vickers voltage regulator system. The exciter supplies DC excitation current to the generator field based on input from the voltage regulator. Failure of any one of the components to perform correctly will negatively impact excitation current supplied to the generator field which in turn directly affects generator output. Therefore, failure of any one of the components may prevent the emergency diesel generator from carrying its associated safety-related loads.

The corrective action which has been, is being, or will be taken:

P/N 8408213: Return to ESI for rework. The part required additional insulating material to increase the core gap.
P/N 8408218: Return to ESI for replacement.
P/N 8411387: Return to ESI for rework to have primary terminal markings re-labeled.

Contacts:

John Kriesel
Engineering Manager
Engine Systems Inc.
175 Freight Rd.
Rocky Mount, NC 27804

Dan Roberts
Quality Manager
Engine Systems Inc.
175 Freight Rd.
Rocky Mount, NC 27804

Affected facilities still include Monticello, Turkey Point, and Surry.

Notified R2DO (Montgomery) and R3DO (McCraw), Part 21/50.55 Reactors group via e-mail.

To top of page
Agreement State Event Number: 53931
Rep Org: OHIO BUREAU OF RADIATION PROTECTION
Licensee: CARDINAL HEALTH
Region: 3
City: DUBLIN   State: OH
County:
License #: 02500250000
Agreement: Y
Docket:
NRC Notified By: MICHAEL RUBADUE
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 03/13/2019
Notification Time: 08:46 [ET]
Event Date: 02/26/2019
Event Time: 00:00 [EDT]
Last Update Date: 03/13/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
Person (Organization):
DARIUSZ SZWARC (R3DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)

Event Text

AGREEMENT STATE REPORT - Mo-99/Tc-99 BREAKTHROUGH LIMIT EXCEEDED.

The following report was received via e-mail:

"On March 7, 2019, the Ohio Department of Health received a phone notification from Cardinal Health stating the first elution on 2/26/2019 from the NorthStar RadioGenix Mo-99/Tc-99m generator exceeded breakthrough limits in Ohio Administrative Code 3701:1-58-35 (10 CFR 35.204). The measured breakthrough was 0.252 microCuries Mo-99 per milliCurie Tc-99m. Cardinal Health stated this was an isolated event and all other elutions have been within the limits. The licensee is using the elution for research only; it is not for human use. Cardinal Health has contacted the manufacture to determine the cause."

Ohio Event: 190004

To top of page
Agreement State Event Number: 53932
Rep Org: TEXAS DEPT OF STATE HEALTH SERVICES
Licensee: TEXAS ONCOLOGY PA
Region: 4
City: AUSTIN   State: TX
County:
License #: L05108
Agreement: Y
Docket:
NRC Notified By: ART TUCKER
HQ OPS Officer: JOANNA BRIDGE
Notification Date: 03/14/2019
Notification Time: 16:05 [ET]
Event Date: 03/07/2019
Event Time: 00:00 [CDT]
Last Update Date: 03/14/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
Person (Organization):
JEREMY GROOM (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)

Event Text

AGREEMENT STATE REPORT - MISADMINISTRATION OF DOSE TO PATIENT

The following was received via e-mail:

"On March 14, 2019, the Texas Department of Health Services was notified by the licensee's radiation safety officer (RSO) that a therapy event had occurred. A patient was scheduled for three fractions using a high dose rate after loader containing a 6.8 curie iridium-192 source. Multiple catheters were to be used. On March 14, 2019, prior to the third fraction, the licensee determined that one of the catheters was shorter than the length required and the patient received 350 centigrays (50 percent) of the prescribed dose to the thigh resulting in the target tissue receiving 50 percent of the prescribed dose (350 centigrays). The third fraction was not administered. The RSO stated they intended to create a new treatment plan to correct the error and insure the intended area receives the correct dose. Additional information will be provided as it is received in accordance with SA-300."

Texas Incident Number: 9665

A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.


Page Last Reviewed/Updated Friday, March 22, 2019
Friday, March 22, 2019