ML20079H198
| ML20079H198 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/03/1991 |
| From: | James Fisicaro ENTERGY OPERATIONS, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 0CAN99110, CAN99110, GL-88-17, GL-89-13, NUDOCS 9110100197 | |
| Download: ML20079H198 (14) | |
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Operations Oct ober 3, 1991 OCAN099110 U. S. Nuclent Regulatory Commission Document Control Desk M111 Statton PI-137 Washington, DC 20555 SUBJI:CT:
Arkan as Nuclear One - Units 1&2
!)ock et Nos. 50-313 6 50-368 1,1 cense Nos. DPR-51 & NPT-6 Implementation Stotus of Four issues at ANO Gentlemen:
The NRR Project Hnnnt. ors for Arkansas Nuclent One, UnJts 1 and 2 (ANO-1 & 2) requested that Entergy Operations ptovhln to t hem the implement ation st atus of four innues at ANO.
The issues include:
- The installation of the third nuxiliary feedwater pump for AND-2, e Thn remaining ANO-1 react or building t emperat uro reduction modi ficat ion, Gennric Lett er 88-17, "hoss of Decny llent Removn!", nwl e
Generic Letter 89-13. " Service Water System Proble.
.f f ect ing Safety-Rolated Equipment".
A brief discussion and thn current st atus of the implementation of each
.!ssue is provided in Attnchments 1 through 4. rnspectively.
Should you havn nny questions regnrding this submitt al, plenso contact me.
Very truly yours,
.h$A&..
Am..
James
. Tislento Director, hicensing JJF/RWC/sjf Attachments
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r ti. H. NRC October 3, 1991 l' air,n 2 a
t cct Mr. Robert Hartin t!. S. Nucionr Regulatory Comminnioti
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' 611 Ryan Plaza 11 Ivo, Suit o 1000 i
' Arlington TX 76iill NPC Senior Residctit Inspnetor Atknunna Nuclear on- - ANO 1 6 2 Number 1, Nuclent Plant Rnnd Runnallville, AR 72801 Mr. Thoman W. Alexion NRR Project Hannger,-Region IV/AND-!
U. S. Nuctent Reguintony Commtanton NKH Hall St op 11-D-23 Uno White Flint North 1155$ Rockvillo Piko Rock v 111 n,- Maryland 20852 Hn..'!ihe.1 R. Pntetnon NRR l'rojnct. Hnnngor. Region IV/ANO-2 U. S. Nucient Regulatory Comminnion NkW Ha ll _ St.op 11-D-23 Onn Whita Flint North 11555 Rockvilin l'lko Rockvillo, Hnrylanti 20852 p.
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I ATTACllMENT 1 TillRD AUXII.I ARY rEEDWATER PUNP f
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t Third Auxilinty I'codwat er l' ump In lof 'ar 2CAN078905, dnted July 19, 1989, ANO r.ommit t eil t o liint nll n now nltot tint ivo pumpirig nynt em t o supply water to ilio alone generator n on AND-2, llotalin on tlin proponeel design and schotiuto for implamositat ton of thin rhnnge voto piovietetl in letter 7CAN049005, doted Agiril 3,
- 1990, 1
ANO proposed in let ter A C49005, to itint all n t hlid Auxillnr y Foodwnt er rump, which will n tno not.n an n start up pump to be unoel in pinco of t ho motor driven Emorgency Foodwa(or pump ior plani atne tup and shutdown.
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pump wnn scheduled to be inatnIled in Llio 1991 rotunllog outngo.
During the olghth-soluollug outngo for ANU-2 (71{8), ANO faintnlleel and placed t ho third Auxilinty Foodwnt or pump into opernt ton.
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ATTACilMENT ?.
ANO-1 REACTOR BUILDING TEMPERATURE REDUCTION HODIFICATION
ANO-1 Reactor llullding Temperature Reduction Modiffention Thn Action Plan f or the AND-1 Ronctor llullding Temperature Reduct ion innue was submitt ed in let ter ICANela80.1, dated Jntionry 29 1988.
1he Action plan was upInted in letter ICAN019016, dnted Janunay ?$. 1990, in letter ICAN109007, dnted Octobnr 26, 1990. Ent ergy Opeint iotis commit t ed to install nn additjonn) nir hnndling utift.
Th!n uttit wan inntalled during l
IR9 1:ntergy Opernt tonn also (.ommitted to add an addit.Jonel nl -cooled chfiler to the Chilled Water System. Thin ndditional chiller modification won innintled and pinced into operation in Hny, 1991.
Initini results indicatn that thenn modificnt fann nte performing in accordance to their design expectat ich for reducing renctor building tempointuren.
A renults report in scheduled for complet ton pi tor to the l
end of 1991.
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i ATTACitMr.NT 3 GENERIO IITTER 6817 1,088 0F DECAY llEAT
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G'neric Lettet 88-17, Loss of Decay llent e
Genoric Letter 88-17, concerning loss of decay h2at removal (DlIR).
requested that licensees respond to recommendations for both expeditious actions and program enhancements to address specific DilR concerns.
60 Day Response to Generic Letter 88-17 Specifically, a 60-day response was requested to include a description of the actions taken to implement each of the eight recommended expeditious actinns ident ified in the Generic Let ter.
The Generic Letter requested that these actiont. bo implemented prior to operating in a reduca inventory condition.
Entergy Operations' response to each of the appropriato expedit ious actions was provided in letter OCAN018901, dated January 5, 1989.
Supplemental responses to GL 88-17 were provided in letters dated June l',
1989 (ICAN068907), July 6, 1989 (OCAN078903), March 29, 1991 (0CAN039104) and April 26, 1991 (2CAN049110). The status of these actions is provided below.
1.
A lesson plan wan developed on the DilR system and is presented to maintenance and work control personnel. These lesson plana discuss the DilR systems, their functiont., operations and procedures to be used on a loss of UllR.
Extcasive operator training, both initial and requalification, have been in place to cover DilR system functions and operat'ons, and procedures used for a loss of DilR. Operations personnel also receive a review of the DilR system prior to each scheduled refueling outages.
The additional lesson plans and enhancements to training base been completed and are currently in place.
See the discussion provided below, in the 20 A1" response section, concerning the programmed enhancements 2.
The procedures controlling the RCS draining operations have been revised to incorporate the Generic Letter recommendations.
See the discussion provided below, in the 90 day response section, concerning the programme 1 enhancements.
3.
The procedures controlling the RLS draining operations have been revised to incorporate portions of the Generic Letter recommundations.
For ANO-2, controls are provided for reduced inventory conditions to ensure that at least two means of RCS temperature are available, as discussed in our March 29, 1991 Amended 60-day response to GL 88-17 (OCANO39104).
Soc the discussion provided below, in the 90 day response sect.lon, concerning the programmed enhancements.
4.
The procedures controlling the PCS draining operations hava been revi red to incorporate portions of the Generic Lotter recommendations.
The operations logs have been revised as required to provide for periodic recording of at least two continous RCS water lovel indicat.lons during reduced invuator y operations.
See the discussion provided below, in the 90 day response section, concerning the programmed enhancements.
5.
A list of. components which have a predict.ahle potential for disrupting the RCS and/or the DHR system has been generated.
This list was added to the appropriate procedure for reference.
The 3,
appropriate procedures have been revised to lacor., orate the Generic Letter recommendations.
See the discussion provided below, in the 90 day response sectlon, concerning the programmed enhancements.
6.
The procedures controlling the RCS draining operations have boon revised to incorporate the Generic Letter recommendations.
See the discussion provided below, in the 90 day response section, concerning the programmed enhancements.
1.
ANO-1 is a Babcock & Wilcox NSSS design.
ANO-2 currently does not use nozzle dams; however, ANO-2 is evaluating the une of nozzle dams.
If nozzle dams are utilized at ANO-2, procedures and administrative mordance with this action.
controls wi.ll be implemented i n
8.
Neither the ANO-1 or 2 NSSS
.ap stop vu.ves.
90 Day Response to Generic Letter 88-17 Generic ~Istter 88-17 also requested a 90 day response. This response was to include a description of enhancements, specific plans and a schedule for implementation of the six programmed enhancement recommendations identified in the Generic Letter. The six programmed enhancements were developed in parallel with the eight recommended expeditious act.icus, in accordance with the guidance and schedule discussed in the Generic Letter.
Thes.e program enhancements involved the following areas:
1.
Instrumentation; 2.
procedures; 3.
Equipment; 4.
Analyses; 5.
Toennical Specifications; ar.d 6.
RCS Porturbacions Entergy Operations provided the required response in letter DCANO38908, dated March 14, 1989. The status of each of these enhancements is provided belou.
Instrumentation In the letter dated March 14, 1989, Entergy Operations stated that ANO-1 provided reliable indications in the Contral Room of the paramettra that aescribe the condition of the RCS and the performance of systems normally used to cool the RCS.
A variabic setpoint for the hNO-1 DHR flow alarm was scheduled to be implemented during IR9, as were variable setpoint. alarms on high temperature from the core exit th3rmocouples and on low RCS level from the ICCMDS. These indications were implemented during 1R9.
Entergy Operations committed to 1) inr, tall an addit lonal level indication (in addition to the existing tygon tube system) during the eighth refueling outage for ANO-2 (2R8)1 2) incorporate the use of temporary cables to ellow use of two core exit thermocouples while the reactor vessel head is being disconeect ed or reconnected, and 3) add visible and audible indications of abnormal conditions in temperature, level, and DilR system performance.
These modifications were implemented during 2R8.
.P.t o_c ed u r.e_s in the March 14, 1989 letter, Entergy Operations stated that ANO-1 does not operate in a reduced inventory condition as defined by the Generic I,et ter with fuel in thn core, therefore the requirement for cont ainment closure does not apply. Severn1 ANO-1 and ANO-2 operating proceduren were enhanced in accordance with the Generic hetter. The enhancements referenced in the ANO response were implement ed using temporary procedure changes t o promptly address the required expeditious actions and were maintained as appropriate. These temporary changes were made permanent changes by IR9 and 2R8.
Equipment In letter DCANO38908, Entergy Operations stnted that administrative and procedural cont.rols governing equipment availability during part ial loop conditions existed for both units.
These procedurt-were enhanced according to the Generic het ter.
The enhancements referenced in the ANO response were implemented using temporary procedure changes to promptly address the required expeditions actions and were maintained as approprinte. These t emporary changes were made permanent changes by 1R9 and 2R8.
A.na 1ysf 8 Generic I.etter 88-17 requested that lleenseo conduct analyses to supplement existing information and develop a basis for procedures, lustrumentation installation and response, and equipment /NSSS interactions and responses.
In lettrr DCANO38908, Entergv Operations stated that additional plant specific annlyses to further enhanc procedures and trnining were being performed. These nnalyses wete initla1ly completed during the summer of 1989.
Subsequent revisions have best performed to support continued procedure enhnnecment. These analyses are undergoing further review as a followup to comments made during the ANO-1 shutdown operations inspection.
Technien1_SpecificaLfon Item 5 of Generic hetter 88-17 programmed enhancements recommended ident.if icat ion of Technical Spec i f ications that restrict or l i m i t.
the safety bonnfit of the actions identi fied in the Generic hett er and submittal of appropriate changes.
In letter DCANO38908 Entergy Operations st.nted that ANO is evalunting appropriate Technical Speci f Icat ton changes.
A change request for ANO-2 Specification 3/4.9.8.1 was submitted on December 15, 1989 (2CAN128903) and another request to change ANO-2 Speci ficat ion 3/4.1.1.3 was submit t ed on February 25, 1991 (2CAN029101).
ANO has determined that a reduction in the minimum shutdown cooling loop flow from 3000 to 2000 gpm was appropriate. The December 15, 1989, request was approved by the NRC in letter dated April 30, 1990, Amendment 104 The February 25, 1991, request is currently being reviewed by the NRC l
RCS Porturbations 1.ists of components which have a predictable potential for disrupting the RCS and/or DilR system havo boon gennrated for ANO-1 and ANO-2.
This information has been included in the approprhto operations procedures and provided to the work planning organization to assist them in datormining components and systems which can or abould not be worked at. vartous points in an out ago involving DilR and reduced inventory operations.
Cortain enhancements woro initially implemented by temporary changes.
Permanent procedural changns and work planning process changes woro completed by IR9 and 2R8.
Programmed Enhnneement Inspection Both of LSo ANO-1 and ANO-2 programs and actions-for GL 88-17 have received NRC inspection.
In the ANO-2 Gb 88-17 inspection report, dated April 24, 1991, it was noted that Entergy Operations agreed to perform the following actions:
1)
Submit a letter to address current compensatory actions which are being taken to prevent inaccurate RCS levnt indication caused by potential problems associated with the RCS level instrument common variable leg sensing linn.
2 '1 Submit. n'Icttor to the NRC which discusses plans for evaluating the enhancements for the ANO-2 reactor coolant system reduend inventory level monitoring capability.
3)
Evaluato enhancement of the shutdown cooling system performatico monitoring system to better detect the approach of a shutdown cooling pump to vortexing coaditions and make improvements as deemed appropriato.
With regards to item 1 above, Entergy Operations submitted letter 2CAN049110, dated April 26, 1991, that descrlhed the ANO-2 RC5 shutdown level moesurement system and the compensatory mea *" es bning taken to reduce the potential for hot leg instrument lino blockage.
In' response to item 2, Entergy Operations reaffirms our intent to perform an evaluation for potential enhancement of the RCS shutdown level measurement system.
This evaluation will include a review of the 3/8th inch tubing routing and protection and a reviaw of other improvements beyond the current design of the system.
Entergy Operations will utilizn the next ANO-2 refueling outago (2R9) t.o perform walkdowns of the system for input to the evaluation. Completion of the evaluation is scheduled for the first quarter of 1993.
For item 3 Entergy Operations also reaffirms our intent to perform an evaluation of the shutdown cooling (SDC) performarco monitoring for potential approach of SDC pump vortexing. This ovaluation is expected to bn completed by June 30, 1992.
ATTACilHENT 4 GENERIC I.ETTER 89-13 SERVICE WATER SYSTEM PROBI, EMS A5'"ECTING SAFETY-REI.ATED EQUIPMEE t
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Generic Lotter 89-13, Servico Water Problems Affecting Safety-Reinted Equipment Generic fetter 89-13, "Scryico Water Problems Affecting Sa foty-Relat ed Equipment *', issund on July 18, 1989 (0CNA078922), requestod that licensees submit a 180 day responsa on establishing programs to implomont Rocommnndat ions 1 through V of the Generic I,nt ter.
The ANO responso to Generic hotter 89-13, dated Janunty 26,1990 (PCAN019ll2), discussed both one-t.imn actions and ongoing proginms for cach of the recommendations.
Tho following informat.f on provides a stat us i the actions committ ed to in the response.
it should bn noted that this submittal does not represent the required notificalion of the implementation of the actions identit led in Generic 1,etter 89-13.
This submittal vill be provided within 30 days of completion of the required actions during t he upcoming IR10 and 2R9 outages at ANO.
R e cpmm nnd a t i ott _,,_11 gf g_u l i ng _ Cyn t rg l l
Thn ANO-blofouling program has been implemented as discussed in our lottor of January 26,-1990.
In this submittal, Entergy Operntions committed to notify thn NRC of changes in blacide types.
In Operating 1,1 cense Amendmeats 132 and 107 for ANO-1 & 2 (0CNA079009), respect ively, t he NRC approvnd the use of alternate blocido treat ment approaches other than chlorino. ANO currently uses bromine for biological fouling control.
Recommendation 11 - Thermal Portormance The ANO-2 one-time actions to purchaso and install additionnl instrumentation and conduct thormal performanen mensurements were complet.ed during 2R8.
Two conditions worn identified from the 2R8 performance mensurements which are currently bning nddressed for resolution.
Similar actions for ANO-1 will be compinted during IRIO (currently scheduled for the spring 1992) as discussed in our response of January 26,
- 1990, lloweve r, thn init.f al verification of service water hont exchanger capability for thormal performance measurements was conducted during IR9.
In Entergy Opernt ions' letter dated November 30, 19( 0 (ICAN119010), ANO-1 Hakeup Room Coolers VilC7A, 711, nad 7C wnro removed f rom the thermal performnnco measurement list prov_ided in the initint Janunty 26, 1990, submittal, sinen they do not per focm a sa fety related f unction.
Rocgmmend LLgg_lli - Dgradallpn,_Cyttrpl A
The survoillance and control of se*vico water component degradntion are performed as part of the ongoing actions for the ANG Service Water Integrity Program (SWIP).
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= liocommendnt lon IV - As-Duf It. Vori fical ion Walkdowns of tho-Servico Water systems worn conducted for both units during the: Inst, respect.1vo refuellrig outages (1R9 and 2R8).
Engineering Reports,
- documenting the: service water system verification,- were completed subseqtient. to each unit 's outage.- The system walkdowns and design verifJcations iesulted in various findings and drawing discrepencies, llowever,: the system design verification determined that the ANO-16 2 servien water systems met-their licensing basis and would porform their-intended _ safety functlons.
Recommendation V - Procedures and Training.
Reviews of ANO-1.6 2 maintenance, opernt.ing and emnrgency procedures w*re conducted and documented prior to startup from the refunljug outnges.
Additionni survoillanca and preventative maintonnnen nctions worn jdentified and changes.to the approprinto procedures will be completed prior to restart from tho'next refueling outages (IR10 and 2R9). This wns.
discunsed in our.Janunty 26, 1990, Intter.
Any necessary revisions to the ANO t raining modules will also be pnrformed prior to the next refueling outnges as discussed in our January 26, 1990, l e t t e r. __
Em o rgar cy_ Coo l i ng_ Pond ( ECJ')_F i s tL opuIation P
- In Entergy Operations' lotter dated July 2, 1990 (OCAN079005), ANG' committed to pnrform addillonal chemical treatment of the ECP to reduco the fish population and establish a frequency for futuro ECP chemical t rea t men t.. -- In August _1990, an addit.lonn! ECP chemical treatment was conducted and fish population determined.
As 'n result of the fish population ~cucountered,_it-was dotermined that an annual ECP treatment will be sufficient.to control the fish population to prevent significant.
rehabitation of the-ECP, Tho pros.rnm _ for nunual - treatment-of t he ECP will be added to the AND SWIP.
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