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Forwards Summary of 871022 Enforcement Conference Re Insp Repts 50-327/87-60 & 50-328/87-60.Apparent Failure to Meet 10CFR50.59 Requirements in That License Amend Not Sought for Cavitating Venturi Installation Discussed.Related Info Encl
	ML20236V672
Person / Time
Site:	Sequoyah
Issue date:	11/30/1987
From:	Richardson S; NRC OFFICE OF SPECIAL PROJECTS
To:	White S; TENNESSEE VALLEY AUTHORITY
References
	NUDOCS 8712040466
	Download: ML20236V672 (11)
	v • d • e

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NOV 3 01987

Docket Nos. 50-327, 50-328

License Nos. DPR-77, DPR-79

Tennessee. Valley Authority

ATTN: Mr. S. A. White.

Manager of Nuclear Power

.SN 38A Lookout Place.

1101 Market Street

Chattanooga, TN 37402-2801

Gentlemen:

SUBJECT: ENFORCEMENT CONFERENCE SUMMARY

(NRC INSPECTION REPORT NOS. 50-327/87-60AND50-328/87-60)

This letter refers to the Enforcement Conference held at our request on .

October 22, 1987. This meeting concerned activities authorized for your.

Sequoyah facility. ' The issues discussed at this conference related to TVA's

apparent' failure to meet the requirements of 10 CFR 50.59 such that a required

license amendment was not sought in support of the cavitating venturi instal-

lation associated with all . four motor driven auxiliary feedwater pumps. A

summary, a list of attendees, and a copy of your handout are enclosed.

It is our opinion that this neeting was beneficial and has provided a better

understanding of the inspection findings, the enforcement issues, and the

status of your' corrective actions. We are continuing our review of these

issues to determine the appropriate enforcement action.

In accordance with Section 2.790 of' the NRC's " Rules of Practice," Part 2

Title 10 Code of Federal Regulations, a copy of this letter and its enclosures

will be placed in the NRC Public Document Room.

Should you have any questions concerning this matter, please contact us.

Sincerely.

Original signed by S. Richardson !

'

Steven D. Richardson, Acting Director .

l TVA Projects Division I

Office of Special Projects

Enclosures:

1.- Enforcement Conference Summary

2. List of Attendees 1

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3. Handout

cc w/encls: (See page 2)

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NOV 3 01987

Tennessee Valley Authority 2

cc w/encis:

H. L. Abercrombie, Site Director

Sequoyah Nuclear Plant

J. A. Kirkebo, Director,

Nuclear Engineering

R. L. Gridley, Director

Nuclear Safety and Licensing

M. R. Harding,- Site Licensing

Manager

TVA Representative, Bethesda

Office

bec w/encis:

S. Ebneter, OSP

G. Zech, OSP

B. Liaw, OSP

K. Barr, OSP/TVA

W. Little, OSP/TVA

G. Jenkins, OSP/RII

F. McCoy, OSP/RII >

R. Carroll, OSP/RII

J. Brady, OSP/RII l

J. Liberman, DOE

J. Rutberg, OGC

NRC Resident Inspector !

Document Control Desk

State of Tennessee

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ENCLOSURE 1

MEETING SUMMARY

On October 22, 1987, an Enforcement Conference was held between representatives

of Tennessee Valley Authority (TVA) and the Office of Special Projects - NRC,

at NRC's request, at the Sequoyah site. The purpose of this conference was to

discuss TVA's apparent failure to meet the requirements of 10 CFR 50.59 such

that a required license amendment was not sought in support of the cavitating

venturi installation associa,ted with all four motor driven auxiliary feedwater

pumps.

I

NRC opened the conference with a brief summary of events since the

Septembei 24, 1987 management meeting which was held between NRC and TVA to

discuss concerns over operability problems related to the Hydrogen Analyzers,

Essential Raw Cooling Water (ERCW) skid valves, ERCW screen wash and strainer

backwash systems, Containment Spray (CS) system, and the motor driven Auxiliary

Feed Water ( AFW) pumps. It was explained that subsequent to the September 24, ,

1987 meeting, NRC review determined that: (1) a TVA plant specific analysis of '

the inappropriate CS orifice installation was necessary, and (2) the AFW pump

cavitating venturi issue warranted treatment as a potential escalated enforce-

ment issue. Accordingly, it was the later determination which prompted the

need for the Enforcement Conference. The specifics, as addressed below, were

then presented to the licensee:

In 1984, TVA implemented ECN L 5842 to replace the Unit I and Unit 2

(1)

motor driven AFW pumps' pressure control valves with cavitating

venturis. Justification for this modification was documented in an

unreviewed safety question determination dated April 25, 1983. In

accordance with 10 CFR 50.59 this modification was not allowed since it

resulted in increased system flow resistance which required a change to i

the test acceptance value specified in Technical Specification (TS) '

4.7.1.2.

(2) Related Post Modification Testing indicated that AFW pump 2A-A could not

deliver 440 gpm with the increased system flow resistance. TVA accepted'

this degraded flow condition as documented in an unreviewed safety ques-

tion determination dated November 1,1984. This reduction in flow con-

stituted a change in the margin of safety as defined in the basis of

TS 4.7.1.2.a.1 and, therefore, constituted an unreviewed safety question

as defined by 10 CFR 50.59.

Following the modifications, both of the units were returned to power operation

(Unit 1 in April 1984 and Unit 2 in December 1984) without ever changing the TS

or receiving prior Commission approval. Additionally, it was expressed to TVA

that had it not been for NRC intervention, it appears that the above problems

would not have been adequately resolved prior to restart.

TVA acknowledged that TS changes should have been made in support of the

modification and subsequent degraded condition of AFW pump 2A-A. The root

cause was identified as personnel judgement error caused by insufficient

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Enclosure 1 2

guidance and compounded by a complex design issue (e.g. , TS minimum pump

recirculation, flow D/P is derived / interpolated, not the actual system limit as

is the case with most TSs). It was further indicated that because the 440 gpm

l flow rate was based.on a Westinghouse generic analysis, TVA felt that their

! plant specific analysis supporting 400 gpm met the intent of the TS basis.

Presented. corrective actions on this specific problem included: (1) a commit-

ment to revise TSs within 60 days after Mode 3 testing, and (2)- the AFW Pump

2A-A venturi and impeller were replaced during this outage.

TVA then discussed those actions which have been implemented since plant

shutdown in August 1985, to assure similar type problems haven't recurred.

These actions include: (1)' program enhancements such as TS training for

engineering design personnel and independent reviews of the engineering safety

evaluation by licensing personnel prior to the performance of related work, as

well as a licensing review of the work plan after the work is complete to

assure no changes, test- deficiencies, etc. have occurred; (2) a review of TS

related equipment, associated TS surveillance requirements, and surveillance

instructions during .the TS surveillance instruction review program; and (3) a

review of ' work plans associated with TS amendments since 1985. This last

review indicated that all but two work plans initially recognized the need for

a TS. change; however, the independent licensing. review did identify such a

need.- The licensee felt this was conclusive proof that the program enhance-

ments have worked, and the problem has been adequately corrected.

NRC asked whether the enhanced process had been audited by TVA and inquired as

to what actions have been or will be taken to assure similar pre-1985 problems

"

don't exist. In response to the first question, TVA indicated that an audit of

the process would be conducted by Quality Assurance and Engineering Assurance.

With respect to the existence of similar pre-1985 problems, TVA requested some

time to look into related Nuclear Performance Plan (NPP) reviews and committed

~to provide the NRC with an answer.

1

In regard to NRC's concern that the AFW pump cavitating venturi problems would

not have been resolved prior to restart without NRC intervention, TVA presented

the following: (1) a TS change was submitted in August 1986 to delete the pump

recirculation flow D/P value and reference the associated surveillance instruc- ;

tion in its place (This change request was rejected by NRC in December 1986.),

and -(2) TVA had always intended to return the AFW pump 2A-A flow rate to

440 gpm. They had replaced the pumps cavitating venturi, and once they were

aware that NRC had concerns, they replaced the pump's impeller.

The conference was brought to a close with the understanding that NRC would

review the results of the QA and EA audits, and that TVA would respond to NRC

on actions to assure similar pre-1985 problems don't exist. NRC reminded TVA

once again that this problem is under evaluation for potential enforcement

action.

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ENCLOSURE 2'

MEETING ATTENDEES

,

U. S. Nuclear Regulatory Commir,sion

- J. G. Keppler, Director, Office of Special Projects (OSP)

S. D. Ebneter, Director, TVA Projects Division (TDVAPD), OSP

G. G. Zech, Assistant Director for Inspection Programs, TVAPD, OSP

K. P. Barr, Deputy Assistant. Director for Inspection Programs, TVAPD, OSP

W. S. Little,' Technical Assistant, TVAPD, OSP

F. R. McCoy, Section. Chief, Sequoayh

R. E. Carroll, Jr. , Project Engineer, Sequoeyh

K. M. Jenison, Senior Resident Inspector, Sequoyah

.

W. K. Poertner, Resident Inspector, Sequoyah

Tennessee Valley Authority

. S. A. White, Manager ~, Office of Nuclear Power (ONP)

C. H.' Fox, Deputy Manager, ONP

R. L. Gridley, Director, Division of Nuclear Licensing

H. L. Abercrombie, Site Director, Sequoyah Nuclear Plant

J. LaPoint, Assistant Site Director

L. M. Nobles, Plant Manager

P. R. Wallace, Assistant to Site Director

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M. R. Harding, Engineer Group Manager

R. H. Buchholz, Sequoyah Site Representative

L'. E. Martin, Manager, Site Quality

J. Hosmer, Division of Nuclear Engineering

M. Burzynski, Manager, Regulatory Licensing

J. Bynum, Assistant Manager, ONP

R. M. Mooney, Supervisor, Systems Engineering

R. H. Scheide, Licensing Engineer

G. B. Kirk, Manager, Compliance Licensing

H. R. Rogers, Plant Operations Review Staff

M. Cooper, Site Licensing

J. Mcdonald, Manager, Watts Bar Licensing

R. Levi, Office of General Council

M. J. Ray, Deputy Director, Division of Nuclear Licensing

T. E. Bostrom, Manager, Project Engineering

R. Rogers, Project Manager,.Bechtel

B. Charlson, Advisor, ONP

R. A. Loar, Regulatory Licensing

! A. M. Qualls, Assistant to Plant Manager

J. B. Brady, Information Manager

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ENCLOSURE 3

TVA HANDOUT

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CHANGE C0MTROL PROCE5tLRE (NEP-6.1}

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EXPERIMENTS PROCEDURE {PMP-0604.04)

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se 9162 GUEES 4 37 tic 3 %.1 12/15:33 Ol/25/e4 01,25c24 sr,C F,v:e.

es104(65) SFP EM setpit.t ir.:rette 2L"4 05/20/s5 06/27/55 10/22/E' M C Re<ien

esl43(E2) fiCP in fBde 3 RWM (1/13/37 02/20/97 02/27/07 :SC revje,

- 145(74) '"l! le el switch tel. FCN 07/10/25 07/22/06 03/03/2h 17C Ee ien

ee87-03 Add ren spc (RHi spray 1 MB 02!!!!57 03/17/87 C4/(3/87 f.RC Eevle,'

ee87-17 types I, discrepancies EET 05/17s87 05/10/27 05/~4/37 'AC Revica

esB7-13 RCP LY set p int rim 04/2?/97 03/14/E7 05/22/67 f.'C 'evien

ee27-20 EPS/EST instrueentasien ,

, ELM '03/25/E7 C5!!4/87 05/22/87 hRC Kevien

ss87-25 Accident Menitoring Instr. En 05/30/67 05/26/87 06/10/87 iAC Fevien

ee87-32 D/6 Rating KRT 05/29/E7 07/31/S7 CS/ll/87 NRC Review

eeS7-33 Eypass Penetrations !!A 05/04/E7 09/03/87 09/17/87 NRC Review

121(73) Chlorine tete:ters RST 06/18!95 01/09/87 01/21/67 NRC Revita

e!32(72) Molded cace Crt. Fkr. i!A 07/33/E6 03/01/05 03/08/E6 NRC Eecien

4126(8]] Af3TS !. EGTS Statcrs ETii 01/15/67 03/25/27 04/16/87 MC Eeview

14!(79) FFW fica calibration VB 01/05/37 01/22/E7 02/0C/37 NRC Fe,iew

27-01 Conflictin; schit, terts iS4 01/21/57 02/13/67 02/27/S7 NitC Feview

J y e57-04 Addition of fire d2tectcrs iS4 ^3/23/67 04/27/87 05/!2/67 idC Review

+87-05 Nan Ead. Dv. C:spl. FWM O!!27/37 03/17/87 04/17/87 WRC Fesien

eS7-06 Delete R4 Vessel table 154 04/06/87 05/14/07 05/22/67 NRC Review

b# #E7-7/ trerg elev./seis, can. ISA 02/26/57 M/09/87 04/17/87 NRC Eerien

27-09 C02s)stetretts Tsu (2/25/E7 04/09/87 04/17/87 NRC Review

si?-10 FEFA ar.d ct.arcoal filters 19 3 03/!C/87 M/09/87 04/17/37 NRC Fevisu

87-:1 Revis? Tatle 4. :.2/r: .sa c TSA 04/05/27 6/29/E7 05/22/E7 i:RC Review

87-12 Del. Icdir.; cleantp :.G 2/ 3 ,27 04/09/87 04/17/B7 l Z Revien

eE7-15 Add FCVs tr, L;3 3.6.? i!A !!7/87 04/23/S7 05/:2/57 G C Review

87-19 Cel ice bid ac:ur,stes. FEM '4/10/27 %/14/57 05/29/87 t$C i:evieu

57-23 !aconhry aater cb.etistry 73; r4/16/67 04/28/S7 05/15/E7 NRCre<ita

+87-24 Revise Spec Activity, 2.4.3 TSA 03/20/E7 05/14/87 C5/22/87 NRC Fevica

867-25 Cel. Eef, tc sec. f.9.1.13.c IEA 04/06/E7 06/05/87 06/19/87 ?!RC Tevien

e37-26 HPFP t'inines Fesp Flen RE 05/21/37 06/18/87 07/02/67 NRC Eevica

37-27 RHR S.ction V6h e I n lat;:r Ra 06/12/E7 07/29/S7 02/05/07 NRC Eevie.;

B7-31 Add vacuus relief isol. rn. C.,N C4/24/E7 05/26/87 06/02/87 N1C Ehiew

e87-35 Add l.'HI FCVs to Table 3.*-1 P'a 04/2]/87 05/25/87 06/10/57 NRC Feriew

87 36 CS Preo Pisctarte Fressare Ea :6/17/97 07/3:/87 09/16/87 to be wit $draer.

e37-37 Add rea'ts fer cant, ccolir.g ?2 90/19/87 09/03/37 09/14/37 HRC Revies

67-23 CVI Eetpr.se time %T 02/04!67 C9/03/E7 09/16/87 NRC Feview

E'l-39 Types !! Rai 09/17/87 09/03/B7 09/14/87 NRC Revien

eB7-40 AFW trtrsfer setpt. 13 7 10/03/G7 / / // NSRB Review

87 ,1 Heavy lesds cur SFF EAT 0i!!S/87 09/03/37 07/li/87 MC Fevieu

87-42 Add t0Vs to letle 3.5-2 FR! D/16/57 / / / / NSRB Eeview

e87-43 CS Pue; Diccharge iru nre RV.1 10/07/37 l / / / E 9 tevien

e - SuiM!T T3 NRC F.;lCP 13 SL' : ?) RE91:;1h3 - 4 IAC Review 13

se . FRICPITY SUMl!~AL = 11 T9.;1NIN3 = 0 Concurrence O

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C.L. Wi:ttn SR 14 716 DNE Irpt 0

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41 total

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ML20236V672

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