ML23207A076
| ML23207A076 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, Nine Mile Point, Catawba, River Bend, McGuire  |
| Issue date: | 07/14/2023 |
| From: | Knott R Paragon Energy Solutions |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| P21-06052023-INT | |
| Download: ML23207A076 (1) | |
Text
1 Hoc, HOO X From:
Richard Knott <RKnott@ParagonES.com>
Sent:
Friday, July 14, 2023 2:38 PM To:
Hoc, HOO X Cc:
Douglas VanTassell; Andrews, Sherry E; Lopp, Andrew; Steven Redman; Joe Garguilo
Subject:
[External_Sender] Update to Interim Part 21 Report P21-06052023-INT Attachments:
Interim Report P21-06052023-UD to NRC.pdf DocumentControlDesk,
PleaseseeaachedupdatetoParagonsinterimPart21report.Paragonsevaluaondeterminedtheissueiden"edin thesubjectinterimreport(ML23159A005)submiedonJune5th2023isnotadesignormanufacturingdefectandis thereforenotreportableper10CFRPart21.
Icon"rmthatnoproprietary,legallyprivileged,and/orcon"denalinformaonisincludedintheaachedupdated no"caon.
Pleasecontactmewithanyquesonsorconcerns.
Respecully, Richard
Richard Knott Vice President, Quality Assurance (518)450-9706 (C) l www.ParagonES.com
ConfidentialityNote:Theinformationcontainedinthismessage(andattachments)isconfidentialandmaybelegally privileged.Themessageisintendedsolelyfortheaddressee(s).Ifyouarenottheintendedrecipient,youarehereby notifiedthatanyuse,dissemination,orreproductionisstrictlyprohibitedandmaybeunlawful.Ifyouarenotthe intendedrecipientpleasecontactthesenderbyreturnemailanddestroyallcopiesoftheoriginalmessageand attachments.
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~A Paragon 7/14/2023 To:
Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 Fax Number (301)816-5151 10CFR Part 21 Interim Notification: P21-06052023-UD
Subject:
Final Update Regarding Potential Defect with Trane External Auto/Stop and Emergency Stop Relay Card PN: Xl3650728-06 Paragon Energy Solutions has concluded the evaluation of the subject potential defect reported under the attached interim report (ML23159A005) in accordance with 10CFR 2l.2l(a)(2). Lab testing determined the failed relay card, reported by Duke Catawba, was an isolated failure most likely caused by low level human-body model (HBM) electro-static discharge (ESD) event. The ESD event caused degradation of the U 1 positive voltage regulator chip resistance characteristics between the input to output and input to ground terminals. The degraded resistance condition of the Ul voltage regulator may have led to improper operation of the U2 microcontroller chip discussed in the interim report.
The condition evaluated does not represent a design or manufacturing defect of the Trane External Auto/Stop and Emergency Stop Relay Card PN: X 13650728-06, and Paragon has not been informed of any additional failures of this part from the lot supplied to Catawba or the other customers included in the scope of supply noted in the interim report. Based on the results of the evaluation, reportability under 1 0CFR Part 21 is not required for this issue.
The below contact information should be utilized regarding any questions.
Sincerely,
~~
Richard Knott Vice President Quality Assurance Paragon Energy Solutions 817-284-0077 rknott@paragones.com Paragon Energy Solutions 7410 Pebble Drive* Fort Worth, Texas* 76118 817-284-0077
- Fax 817-590-0484 Page 1 of I
~A Paragon 6/05/2023 To:
Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 Fax Number (301)816-5151 toCFR Part 21 Interim Notification: P21-06052023-INT
Subject:
Reporting of a Potential Defect with Trane External Auto/Stop and Emergency Stop Relay Card PN: X13650728-06 Requiring Additional Time to Evaluate Pursuant to l 0CFR 21.21 (a)(2), Paragon Energy Solutions, LLC is providing this interim notification of ongoing analysis for Part 21 reportability of a potential defect with the subject relay card.
Potential Affected Plants:
Plant Customer PO#
Line#
CatlD/Item #
QTY NINE MILE POINT 00631665 l
1677945-1 I
NINE MILE POINT 7736804 7
495385 1
NINE MILE POINT 00680931 l
1677945-1 2
CATAWBA 00173787 27 886875 4
CH-531 Chiller Control Panel Proiects Which Mav Have Installed Relay Cards RIVERBEND 10322999 MCGUIRE 00049845 00049846 00049842 CATAWBA 00106394 Condition being evaluated:
On April 51h, 2023, Duke Catawba Nuclear Station informed Paragon of a failure of the relay card upon installation into the CH-531 control panel during planned maintenance on the chiller system. Following replacement, the relay module bound to the Adaptiview system correctly, but the chiller attempted to start without signal to start from the control room. The issue was discovered when the chiller initiated diagnostics for missing evaporator water flow. Flow was not maintained on the chiller due to continued maintenance; however, an internal failure of the 1 A 13 module (X 13650728-06) caused the module to read a closed contact at tenninals 13-1/2 which would ordinarily come from closure of the control room start contact. The failure was readily determined during system restoration.
The affected card was originally supplied to Catawba in December 2014 with three other units which have been tested satisfactorily at the plant. The specific failure noted above would not prevent the chiller from perfonning its safety function. To date this is the only failure of the affected part number which has been Paragon Energy Solutions 7410 Pebble Drive* Fort Worth, Texas* 76118 817-284-0077
- Fax 81 7-590-0484 Page l of l
reported to Paragon. Our analysis of the failed relay card has identified minor delamination and water intrusion of the microcontroller chip (date code 1308) installed. This is the only anomaly identified to date, and therefore it is difficult to determine l) if this condition could exist in more units and 2) if this condition could cause the relay card to fail in a manner that could prevent the chiller from performing its safety function.
Date when evaluation is expected to be complete: 7/ 15/2023.
- Regards,
~==~~It Vice President Quality Assurance Paragon Energy Solutions 8 l 7-284-0077 rknott@paragones.com Part 21 Report No: P21-06052023-INT, Rev. 0 Page 2 of 2