ML20202D599

Forwards Supplemental Response to Unresolved Item Violations Noted in Insp Rept 50-483/97-15.Corrective Actions:Plant Shutdown Would Be Required to Establish Equipment Operability

ML20202D599
Person / Time
Site:	Callaway
Issue date:	02/10/1998
From:	Laux J UNION ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
50-483-97-15, ULNRC-3725, NUDOCS 9802170123
Download: ML20202D599 (10)

Text

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• l9lsonc20 rattawar Dant nihon, MO G5351 February 10,1998 d.

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U. S. Nuclear Regulatory Commission Attn: Document ControlDesk Mail Stop Pl.137 Washington, DC 20555 0001 ULNRC.3725 Gentlemen:

SUPPLEMENTAL REPLY TO UNRESOLVED ITEM INSPECTION REPORT NO. 50-483/97015 UNION ELECTRIC CO CALLAWAY PLANT Ref: ULNRC-3668 This response supplements information provided in our letter dated November 14, 1997. During a meeting held with the NRC staff on January 29,1998, it was  ;

determined that additionalinformetion would be useful to facilitate resolution of the I Unresolved item discussed in Inspection Reports 50-483/97015 and $0-483/97017. As  ;

such, the following attachments provide specific examples to illustrate the potential i impact of the NRC stafi's proposed interpretation regarding technical soecification required shutdown surveillance testing.

Attachment 1 provides examples of components that are actuated oy the emergency diesel load sequencer and can be tested while the plant is at power with no adverse  ;

consequences, Based on the NRC stafi's proposed interpretation, examples are '

provided where:

A plant shotdown would be required to establish equipment OPERABILITY ,!

or

• enforcement discretion would be required to perform testing on line to k l

establish equipment OPERABILIT.Y or, #

enforcement discretion would be required to permit continued operation and ilOU1 defer testing to some future plant shutdown.

9902170123 900210 illilillllllilH Il***

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. ULNRC-3725 February 10,1998 Page 2 Attachment 2 provides specific examples of work performed at Callaway where, utilizing the NRC steff's proposed interpretation, enforcement discretion would be required to prevent an unnecessary plant shutdown.

These lists are not all encompassing, but are intended to illustrate adva se effects of the NRC staft's proposed interpretation regarding the Unresolved Item identified at Callaway Plant. If our understanding of the staf!'s proposed interpretation is incorrect, we would be glad to have further discussions with you at your convenience.

None of the material in the response is consia'ered proprietary by Union Electric.

l If you have any questions regarding this response or if additional information is required, please let me krmw, Sincerely, J. V. ux Manager, Quality Assurance JVIJMAR/tmw

Attachment:

1) Component Shed From Emergency Busses

2) Specific Examples of Maintenance Activities Performed at Callaway Plant

4 0 ULNRC-3725 February 10,1994 Page 3 #.

cc: Mr. Ellis W. Merschoff Regional Administrator U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 8064 Mr. William H. Bateman Director, Project Directorate 1%2 Office of Nuclear Reactor Regulation

, U. S. Nuclear Regulatory Commission Mall Stop 13E16 Washington, DC 20555 2738 Mr. Thomas P. Gwynn Director Division of Reactor Projects U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 8064 Mr. Barry C. Westreich (2 copies)

Acting Licensing Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 13E16 Washington, DC 20555-2738 Senior Resident Inspector Callaway Resident Oftice

.U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman,MO 65077 Manager, Electric Department

. Missouri Public Service Commission PO Box 360 Jefferson City, MO 65102

9

^

ULNRC-3725 February 10,1998 Page 4 Mr. Thomas A. Baxter Shaw, Pittman, Potts, & Trowbridge 2300 N. Street N.W.

Washington, DC 20037 Manager, Plant Support Wolf Creek Nuclear Operating Corporation PO Box 411 Burlington, KS 6683" l

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V

e Attachment I to ULNRC-3725 February 10,1998 Page1 Conanaments Shed Frna Emermency Busses The following is a list of congonents which are shed from the emergency tus following a LOCA. The shed of these components can be individually tested on-line with no adverse impact to plant operation:

1. ofIndividual Componeet Classification Components ESW Pump Room Unit Heater _ 12 l

UHS Coolira Tower Surnip Heaters 4 Lishtina Transformer 13 l Plant Computer Inverter 2 CRDM Coolina Fans 2 Boric Acid Transfer Pumps 2

_ UHS Coolina Tower Equip. Rm. Sump Pumps 2 The following is apart /allist of components which are shed from the emergency bus following a Loss of Offsite Power. The shed of these components car. also be tested a on-line with no adverse impact to plant operation:

1. ofIndividual Compcsent Classification Components Auxiliary Feedwater Pumps 2 Essential Service Water Pumps 2 Component Coolina Water Pumps - ,

4 RHR Pumps 2 Safety Irdection Pumps 2 ,

Contr,itunent Spray Pumps 2 Fuel Pool Coolina Pumps 2 NB01 Ahernate Feeder Breaker 1 NB02 Alternate Feeder Breaker 1 These lists contain only so#re of the components actuated by the sequencers. Additional listings could be provided for equipment shed or started from other actuations, inhibit contacts, etc. T hese individual actuations can be easily curveilled at power with no .

perturbation on plant operation. Based on the proposed NRC staffinterpretation, an enforcement relief or a plant shutdown would be required to take credit for any test used -

to satirfy the sequencer surveillance requirement. This linplies that any of these

. i I

i Attachment I to ULNRC-3725 February 10,1998 '

Page2.

l components (or others in these categories) that are repaired on line could not be returned to service due to not being able to take credit for performarW of the surveillance.

~

The examples below describe situations where, utilizing the NRC staff's proposed  !"

interpretation, an enforcement relief or a plant shutdown would be required to take credit for a reted and declare the equipment OPERABLE. The alternative would be to hold the equipment out of service until the next plant shutdown. r EXAMPLES: [

Lighting Transformer  ;

This circuit consists of a breaker connecting the lighting transformer to the 480 V bus. The shunt trip for this breaker is actuated firom a sequencer cabinet relay on a  ;

LOCA sequence. If the relay or the breaker failed, or other maintene.nce was  !

performed which could effect the shed function, post maintenance testing would  ;

require verification of the shed capability from the sequencer relay. i CRDM Cooling Fans ,

The two CRDM cooling fans fed firom safety related power have a trip coil i connected to their breaker in the same manner as the lighting transfonner example discussed above. Failure or maintenance on these would also require shed-verification as discussed above. i Auxiliary Foodwater Pumps .  ;

~

l- The Auxiliary Foodwater pumps (and the other listed pumps) have a relay contact L-in the trip circuit that closes on a Loss of Offsite Power to shed the pump ifit is j running. This case is similar to those discussed above, where failure or .

maintenance which could affect the shed function would regul e verification of shed capability prior to returning the pump to OPERABLE status.

These pumps also sequence onto the safety bus following a Loss of Offsite Power .

(shutdown sequence) or Safety Injection (LOCA 'equence). Fanure, or maintenance which would afroct the ability of the pump to start from the sequencer -

relay, would require verifying this actuation. This is easily accomplished without ,

running the complete sequence by energizing the individual ielay. Other testing within the sequencer cabinet provides the verification of relay actuation on the appropriate step.  ;

• y re- -ir-FT-=+ m- -- -+ 9 "t++ y1--w-evi-r-=r'm~-g +- w sy=- T w--- w wr,**+ vive-=vte-we-= -- es---e c =w- m u y-v*--me-'r --'W-t-=-8' ' - + - ' ' ' 9 N F-+------=M'****t**W" - * ' '

Attachment 2 to ULNRC 3725 Februuy 10,1998 Pate 1 Snecine Enamnies of Malatemance Acirities Performed at Callaway Plant Component ClasslGcation Bre.ker ID WR'e rtquiring Enforcement Discretion l

ESW Pump Room Unit Hester _

EGD01A NG05EEFl C575048 970923 INSTALL NEW CKT BREAKER (EGD01 A)

W161605 931123 VERIFY ATI &

LOAD SHED OF BRKR.

EGD01B NG06EEF1 C575058 971013 INSTALL NEW CIRCUIT BREAKER (EGD01B)

EGD01C NG05EFF2 C575052 970824 INSTALL ,

NEW CIRCUIT BREAKER (EGD01C)

EGDOID NG06EFFI C575061 971014 INSTALL NEW CIRCUIT BREAKER GGD01D) .

EGD01E NG05EFF1 C575051 %1113- INSTALL NEW CIRCUIT BREAKER (EGD01E) .

EGD01F NG06EEF3 C575060 961220 INSTALL NEW i; CIRCUIT BREAKER (EGD01F)

EGD01G NG05EEF4 C575050 960924 INSTALL NEW ,

CIRCUIT BREAKER (EGD0lG)

WI83879  % 1110 T/S REWORY BKR FAILING TO OPEN EGD0lH NG06EFF3 C575063 971015 INSTALL NEW CIRCUIT BREAKER (EGD01H)

EGD02A NG07FDF5 C575073 970924 INSTALL NEW CIRCUIT BREAKER (EGD02A)

EGD02B NG08FDF5 C575084 971017 INSTALL NEW CIRCUIT BREAKER (EGD028)

EGD02C NG07FDF3 C57f370 970923 INSTALL NEW CIRCUIT BREAKER (EGD02C)

EGD02D NG08FDF3 C575082 971016 INSTALL NEW CIRCUIT BREAKER (EGD02D)

UHS Cooling Tower Sump Heaters SEF02A N007FDF6 C575074 970731 INSTALL NEW CIRCUIT BREAKER (SEF02A)

SEF02B NG08FDF6 C575085 970912 INSTALL NEW CIRCUIT BREAKER (SEF02B)

. Attachment 2 to ULNRC-3725 February 10,1998 Page 2 l Composent ClasslAcation Breaker ID Wk's requiring Enforcement Discretion SEF02C NG07FDFl C573068 970612 INSTALL NEW CIRCUIT BREAKER (SEF02C)

SEF02D NG08FDF1 C575080 970911 INSTALL NEW

' CIRCUIT BREAKER (SEF02D)

Lighting Transformer XQB50 NGOSEEF3 C575049 970925 INSTALL NEW CIRCUIT BREAKER (XQB50)

XQB51 NG06EFF2 C575062 M1210 INSTALL NEW CIRCUIT BREAKER XQB52 NG07FDF2 C575069 970611 INSTALL NEW CIRCUIT BREAKER (QB52)

XQB53 NG08FDF2 C575081 970716 INSTALL NEW CIRCUIT BREAKER (QB53)

XQB60 NG02AAF2 C574904 970228 INSTALL NEW CIRCUIT BREAKER XQE61 NG01AHFS C574883 970314 INSTALL NEW CIRCUIT BREAKER (QB61)

XQB65 NG01AHF2 C574881 970313 INSTALL NEW CIRCUIT BREAKER (QB65)

XQB70 NG02AAFI C574903 970227 INSTALL NEW CIRCUIT BREAKER XQB75 NG01AllF1 C574880 970312 INSTALL NEW CIRCUIT BREAKER (QB75)

XQB80 NG01BJF1 C574900 970313 INSTALLNhW CIRCUIT _ BREAKER (QB80)

'. .qB 85 NG02BJF1 C574960 960812 INSTALL NEW CIRCUIT BREAKER (QB85)

XQB90 NG01BJF2 C574901 970314 INSTALL NEW CIRCUIT BREAKER (QB90)

XQB95 NG02BJF2 C574961 960726 INSTALL NEW CIRCUIT BREAKER Plant Computer Inverter PQO2 NG02AAF3 C574905 970205 INSTALL NEW CIRCUIT BREAKER (PQO2)

PQO3 NG01AIIF3 C574823 951122 INSTALL CIRCUIT BREAKER

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Attachment 2 to ULNRC-3725 February 10,1998 Page 3 Component Classification Breaker ID WR's requirina Enforcement Discretion i2 CRDM Coolina Fans CGN01B NG02BJF5 R471525A 900727 VERIFY LOAD SHED NG02BJF5 l R479611A 950210 VERIFY LOAD SIIED NG02BJF5 C546356 950210 REPLACE CIRCUIT BREAKER (DCGN01B)

CGN01D NG01BJF5 C530861 931207 REPLACE i CIRCUIT BREAKER (CGN01D) _

Beric Acid Transfer Pumps PBG02A NG01AHF4 C574882 961003 INSTALL NEW CIRCUIT BREAKER O'BG02A)

PBG02B NG02AAF4 C574906 960719 INSTALL NEW CIRCUIT BREAKER UHS Coollag Tower Equip. R n. Sump Pumps , .

PEF 02A NG07FDF4 C575071 980121 INSTALL NEW BREAKER (PEF 01 A) _

PEF 02B NG08FDF4 C575083 (TSD)990219 INSTALL NEW BREAKER (PEF 02B)

ESW Pump House Holst IIKF041 NG06EEF2 C575059 960509 INSTALL NEW CIRCUIT BREAKER OIKF41)

PASS Transforener XSJ01 NG01BKF4 C574902 970314 INSTALL NEW CIRCUIT BREAKER

@J146)

Inimediate Borate Valve BGHV8104 NG04CPF2 C574811 960125 INSTALL NEW CIRCUIT BREAiGR

, . Attachment 2 to ULNRC-3725 l FebruaN 10,1998  !

Page 4 Comiponent Classincation Breaker ID WR's requiring Enforcennent Discretion Battery Charmers PK21 NG0102 P499382 930413 CLEANANSPECT LC BREAKER (PK21)

P531932 941013 CLEANHNSPECT LC BREAKER (PK21)

P558651 971218 CLEANANSPECT LC BREAKER (PK21)

PJ31 NG0202 P496027 921109 CLEANANSPECT LC BREAKER (PJ31)

P524704 940526 CLEANANSPECT LC BREAKER (PJ31)

P552955 970918 CLEANANSPECT LC BREAKER (PJ31) .

PK23 NG0110 P496931 930423 CLEAN AND INSPECT LC (PK23)

P532517 941017 CLEANANSPECT ,

LC BKR(PK23)

P559372 971031 CLEANANSPECT LC BKR(PK23)

PK24 NG0410 P523655 940623 CLEAN / INSPECT LC BREAKER (PK24)

P554058 971211 >

CLEAN / INSPECT LC BREAKER (PK24)

PK22 NG0409 P523657 940630 CLEANANSPECT LC BREAKER (PK22)

P554335 971010 CLEAN / INSPECT LC BREAKER (PK22) '