ML15022A650
| ML15022A650 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Peach Bottom, Salem, Nine Mile Point, Palisades, Perry, Wolf Creek, Saint Lucie, Point Beach, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Braidwood, Prairie Island, Surry, Limerick, North Anna, River Bend, Vogtle, Duane Arnold, Robinson, South Texas, San Onofre, Cook, Quad Cities, FitzPatrick  |
| Issue date: | 01/20/2015 |
| From: | Eisenberg S National Technical Systems |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML15022A650 (4) | |
Text
0 PI TSwwntco January 20, 2015 Document Control Desk US Nuclear Regulatory Commission Washington, DC 20555-0001
SUBJECT:
USNRC 10CFR Part 21 Notification
REFERENCE:
NTS CPAR 13-23 Firmware Notice for users of Yokogawa DX1000N and DX2000 Model Recorders The purpose of this letter is to provide an amendment to our 10CFR Part 21 Notification made originally on July 19, 2013. Specifically, the attachment was revised to identify five purchase orders omitted from the original submittal and to correct two typographical errors. The specific changes are indentified as an addendum Text from original letter:
This letter is to inform you of a potential Yokogawa Data Recorder lock-up condition that under specific circumstances may occur on Yokogawa DXAdvanced DX1000N and DX2000 models equipped with firmware versions 3.01 through 4.14. These recorders were bought commercially from Yokogawa by National Technical Systems (NTS) and dedicated as basic components for nuclear safety related service.
The lock-up condition only impacts recorders when utilizing a "custom trend display" option. There is no lock-up concern with these models when standard display screens are in use or on models using firmware versions earlier than R3.01. While NTS has not received any notification this lock-up condition occurred on a safety related recorder, please see the below description of the error and the appropriate corrective measures.
Background:
Public Service Electric and Gas - Hope Creek NPP notified NTS and Yokogawa of a lock up condition which occurred on a newly installed non-safety data recorder in their simulator. Yokogawa studied the condition and notified NTS on June 14, 2013 that a firmware error occurs during a specific set of operating conditions and sequence of events and was identified as the root cause of the recorder lock up condition. While these conditions are highly unlikely in an operating plant because under normal practice the internal memory on the recorder would not be cleared, the recorder will lock-up if the below set up conditions occur simultaneously:
National Technical Systems, Inc.
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- 1. A "Custom Display" that uses a trend screen is active and visible.
- 2. There is no trend data stored in memory (blank trend screen); this is the condition following a "Clear 3" initialize
- 3. A "Second Speed" function is invoked via remote input activation (requires /R1 option) or from front panel key activation. This is called "Trend rate switching" a function enabled in Basic Setting Mode that allows the trend update time/division to switch between two separate speeds.
Corrective Action:
This error only affects recorders if "Custom Display" is being utilized. If this feature is not being used, no immediate action needs to be taken.
If custom screens exist, then please utilize the recommendations below and update firmware when the new version (4.19) becomes available in August 2013.
A short-term countermeasure is to follow the Yokogawa operational procedure of starting to record data immediately after invoking a "Clear 3" initialize, and then waiting for at least one trend update to occur (Display data save) before invoking a "Second Speed" change action.
Should a lock-up condition occur, as indicated by a freeze of the display clock, the recorder simply needs to be powered off and re-started. The recorder will continue to function properly.
Based on the above, The Nuclear Utilities need to be notified concerning this deviation so an evaluation may be performed to determine if this constitutes a defect that could create a substantial safety hazard. NTS cannot make this determination as only the effected utilities know the way the recorders are configured and utilized.
The attached list is the Nuclear Power Plants which have been provided DX Advanced safety related Yokogawa Recorders with firmware versions 3.01 and above by NTS. NTS has notified these utilities of the above condition via e-mail on July 16, 2013.
Sincerely, Steven R. Eisenberg Manager - Special NucI ojects National Technical Systems CC:
Bruce Gleghorn - NTS Dan Cannon - NTS Ronald Kelly - NTS Thomas Brewington - NTS National Technical Systems, Inc.
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AMMENDED ATTACHMENT TO NTS NRC LETTER 7/19/2013 CLIENT CLIENT PURCHASE ORDERS CENG - Nine Mile 7733424/7730393 Dominion - Surry Station 45782834/4500008940 Dominion - North Anna 45850091/00046364 Entergy - Arkansas Nuclear One 10313790/10326509/10341761/10362938/10372680 Entergy - Fitzpatrick 10312328/10317512/10329338/10339942/
10346811/10364096/10379046/10385396 Entergy - Grand Gulf 10299200 Entergy - Pilgrim Nuclear Station 10357795/10365141 Entergy - River Bend 10293835/10379891/10383702 Exelon - Braidwood Warehouse 49451.7 Exelon - Byron 00506649 Exelon - Dresden Station 00455461/00473611/00483004/0049216/00507417 Exelon - Limerick Generating Station 90 053617 Exelon - Quad Cities 00479167/00497042/00497239/00508331/00464988/
00480022 First Energy-Perry Plant 45366526/45374559/45374707 Florida Power & Light - St. Lucie 02286603/02307150 Georgia Power - Vogtle Plant SNG10020214 AEP - DC Cook 01557419/01557729 Nebraska Public Power - Cooper 4500151420/4500152079/4500154944 NextEra Energy - Duane Arnold 02313631 NextEra Energy - Point Beach 00031188 Entergy-Palisades 10316253 Progress Energy - H.B. Robinson Plant 00571766/00576508 PSE&G - Salem/Hope Creek 4500574885/4500712721 Edison - San Onofre 4500355704/4500461701 STP Nuclear Operating Company 126480/130241/136969/145482/149909/153762/158238 TVA - Sequoyah Station 4062-185256/4062-205436/268529/4062-424636 4062-428255 Wolf Creek Nuclear Operating Corp.
757157 Xcel Energy - Prairie Island Nuclear 00037448/00046365 National Technical Systems. Inc.
Page 3 of 4 7800 Highwi/ 20 West, Huntsville, AL 35806 Main: 256-837-4411 Fax: 256-837-3363
Revisions to Attachment PO's omitted from original submittal Client Client PO NextEra - Point Beach 00031188 STP Nuclear Operating Company 126480 Exelon-Dresden Station 00455461 Entergy - Grand Gulf 10299200 Entergy - ANO 10313790 Typographical errors corrected from original submittal.
Client Client PO Originally Correct PO Reported PSE&G Salem / Hope Creek 4500574888 4500574885 NPPD - Cooper 4500156944 4500154944 National Technical Systems. Inc.
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