05000530/LER-2025-001, Unintentional Uncontrolled Vital Area Keys

From kanterella
Jump to navigation Jump to search
Unintentional Uncontrolled Vital Area Keys
ML26044A254
Person / Time
Site: Palo Verde 
Issue date: 02/13/2026
From: Spina J
Arizona Public Service Co
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
102-09031-JLS/JJM LER 2025-001-00
Download: ML26044A254 (0)


LER-2025-001, Unintentional Uncontrolled Vital Area Keys
Event date:
Report date:
5302025001R00 - NRC Website

text

Spina, Jennifer (Z08962)

Digitally signed by Spina, Jennifer (Z08962)

Date: 2026.02.13 14:16:54 -07'00'

Abstract

2Q'HFHPEHU8QLW9LWDO$UHDNH\VZHUHOHIWXQFRQWUROOHGLQWKH2SHUDWLRQV6XSSRUW%XLOGLQJ

26% 7KHNH\VZHUHGLVFRYHUHGE\DQ$X[LOLDU\2SHUDWRUDQGSURPSWO\UHWXUQHGWR6HFXULW\7KLVLVD

YLRODWLRQRI J  DVIXUWKHURXWOLQHGLQ5HJXODWRU\*XLGH 5* 6HFWLRQ  3K\VLFDO6HFXULW\

FRQILUPHGWKHUHZHUHQRXQDXWKRUL]HGHQWULHVRUXQXVXDOWUDQVDFWLRQVE\UHYLHZLQJEDGJHDQGDODUPWUDQVDFWLRQ

UHSRUWV

7KHURRWFDXVHRIWKHHYHQWZDVGHWHUPLQHGWREHDQLQGLYLGXDOIDLOHGWRPDLQWDLQFRQWURORI9LWDO$UHDNH\VDV

UHTXLUHGE\VWDWLRQSURFHGXUHV

1RVLPLODUHYHQWVKDYHEHHQUHSRUWHGE\391*6LQWKHODVWWKUHH\HDUVPage of

3. LER NUMBER YEAR SEQUENTIAL NUMBER REV NO.

052 050 8SRQDUULYLQJDWWKHQH[WSRVWWKHILUVW6HFXULW\2IILFHUEHJDQWXUQRYHUSURFHGXUHDQGGLVFRYHUHGWKHNH\VZHUH

PLVVLQJ7KHRIILFHUUHWXUQHGWRWKH26%PHWZLWKWKHRWKHU6HFXULW\2IILFHUDQGUHFRYHUHGWKHNH\V6HFXULW\

/HDGHUVKLSZDVQRWLILHGDQGLPSOHPHQWHGFRPSHQVDWRU\PHDVXUHV$EDGJHWUDQVDFWLRQUHYLHZVKRZHGQR

XQDXWKRUL]HGDFWLYLW\DQGQRLQWUXVLRQWDPSHUDODUPV

 $66(660(172)6$)(7<&216(48(1&(6

7KHUHZHUHQRLQRSHUDEOHVWUXFWXUHVV\VWHPVRUFRPSRQHQWVWKDWFRQWULEXWHGWRWKLVHYHQW7KHUHZDVQR

UDGLRORJLFDORULQGXVWULDOVDIHW\VLJQLILFDQFHLQYROYHGLQWKLVHYHQW

 &$86(2)7+((9(17

'XULQJWKLVHYHQWWKHRIILFHUGLGQRWXWLOL]HDSSURSULDWHVHOIFKHFNWRROVDQGEHFDPHFRPSODFHQWDQGGLVWUDFWHG

GXULQJSRVWURWDWLRQ7KHRIILFHUUHPRYHGWKH9LWDO$UHDNH\VIURPKLVSHUVRQZKHQSURFHGXUHVUHTXLUHWKDWDOO

NH\VDUHWREHSURSHUO\FRQWUROOHGZLWKDSSURSULDWHNH\UHWHQWLRQGHYLFHV

 &255(&7,9($&7,216

,PPHGLDWHFRUUHFWLYHDFWLRQVZHUHFRPSOHWHGE\HVWDEOLVKLQJDSSURSULDWHFRPSHQVDWRU\PHDVXUHVUHFRYHU\RI

WKH9LWDO$UHDNH\VDQGSHUIRUPHGDEDGJHWUDQVDFWLRQUHSRUWWRYHULI\WKHUHZDVQRXQDXWKRUL]HGXVHRIWKH

NH\V

$GGLWLRQDOO\ EULHILQJV ZHUH FRQGXFWHG WR UHLQIRUFH FRQGXFW RI VHFXULW\ IRFXVHG RQ VHOIFKHFN SUDFWLFHV DQG

DWWHQWLRQ WR GHWDLO UHJDUGLQJ PDLQWDLQLQJ FRQWURO RI HTXLSPHQW SHUWDLQLQJ WR 9LWDO $UHD NH\V (QKDQFHPHQW

DFWLRQVLQFOXGHFODULI\LQJJXLGDQFHLQSURFHGXUHVZLWKLQFUHDVHGOHDGHUVKLSRYHUVLJKW

 35(9,2866,0,/$5(9(176

1RVLPLODUHYHQWVKDYHRFFXUUHGDW391*6LQWKHSULRUWKUHH\HDUV

3 3

Palo Verde Nuclear Generating Station (PVNGS) Unit 3 00530 25 001 00