ML17360A145

Responds to Generic Ltr 88-14, Instrument Air Supply Sys Problems Affecting Safety-Related Equipment, Per NUREG-1275,Vol 2.Instrument Air Sys Adequate for Operation of pneumatically-operated,safety-related Equipment

ML17360A145
Person / Time
Site:	Vogtle
Issue date:	02/17/1989
From:	Hairston W GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
RTR-NUREG-1275 ELV-00197, ELV-197, GL-88-14, NUDOCS 8903090244
Download: ML17360A145 (98)

Text

13-MS-A20 APPENDIX C e

F l ~ . 37 February I J, 1989 ELY-0019?

0955D gg- qz'f U. S. Huclear Regulatory Co~sission Region 11, Suite 2900 101 Marietta Street H. V.

Atlanta, GA 30323" YOGTLE ELECTRIC GEHERATIHG PLANT - UNITS 1 an~ 2 OPERkTIHG LICENSES HPF-68 ANO NPF-79 GEN.RIC LE>>EP. HO., 88-)4 INSTRUMENT AIR SUPPLY 5 te,. < "L .". Arr g t tN Art. ) t ELAN tOUIPMEHT Gent 1 emen:

Generic Letter 88-14 requested that each licensee/applicant revie~ NUREG-1275, Volume 2 and perform a design and operational verification of the instrument air system. k response to this generic letter ~as to be submitted to the NRC within 180 days.

Attached is a response to the identified concerns of NUREG - 1275, Yolume 2.

The revims and/or inves igations indicate tha. the design, installation, testing, operation and mainterance of the instrument air systems at Plant Yogtle are adequate to ensure the proper and reliable operation of pneumat ical ly-opera ted, sa ety-related equipment.

If you have any questions, please advise.

Mr. M. G. Hairston, III states that he is a Senior Yice President of Georgia Pobder Company and is authorized to execute this oath on behalf of Georgia Pomr Company and that, to the bes of his knobdledge and belie', the facts set forth in this letter and enclosures are true.

G=QRGIA POWER COMPANY

, t'sf. .s By:

ss s ~

r s;. N. . r!a>rston, i ii Suorn so end subscribed be, ore sne :his ~7 - deX of Februsr/,

VM/i jb .

13-MS-A20 APPENDIX C ELY-00197 Page e

Enclosure:

cc: Georoia Pover Cornanv Hr. P. D. Rice Hr. C, K. HcCoy Hr. G. Bockhold, Jr.

GONORH5 U.S. Nuclear Reaulatorv Coraission Hr. H. L. ms-, Act>ng ec>ona i Administrator Hr. J. B. Hopkins, Licensing Project Manager, NRP. (2 copies)

Hr. J. F. Rogge, Senior Resident Inspector-Operations, Yogtle

13-MS-A20 APPENDIX C YOGTLE ELECTRIC GENERATING PLANT UNITS 1 AND 2 RESPONSE TO G:.NERIC LETT R 88-14 G.L. Item 1: Verification by test that actual ins rv~ ' a r quality ns.rvmen. lit is con-sistent xith the ranufac urers'ecommendations for individua A. Action Plan:

Verify the Instrument Air equal-ity from perfor.>ance of re-o pre-operational test procedvres.

2. Periodic verificat>on,during perfo, .~nce of preven ive r~ intenance (PH) tasks associated with the Inns rumen t Air System.

3 Select sample points and conduct ai.'itional in-plant testing to measure actual instrument air quality.

'C Veri,y diesel generator air start system air quality from preoperational test procedures..

B. Resoonse:

Tes.ing of'nstrument air system air qua li:y has been en accomp 1">shed h as fo1 1ows a Y".GP:

l. Testing ac <v>ties during the per ormance of preopera tional test procedures consisted of verifying the air quality (moisture and oil content) immediately downstream of the af'terfilter for each set of dryers and at the end oi selected feeder lines. This testing was acco'plished in accordance with the YEGP stated position of conforr>ance to Regulatory Guide 1.68.3 which is provided i FSAR 5

. 8.4.2. This statement of conformance corr.i "ed VEGP to meeting the quality requirements of ANSI/ISA 57.3-1975 for verifying moisture and oil content and no'.e th at veri-

.ion o particvlate size at the end of each feeder, line is no. considered necessary at VEGP since "he YEGP instru-r>. n'ir system design is svch that instrum n' fil:ere at the dehumidifier and at each instrument (by a n air is local fil er/regulato-) in accordance with individual ins.rvment manufacturer's requirements.'o meet the requirements of ANSI/ISA 5?.3-19?5, the acceptance criteria for raximum al]owable oil content wa es abl '

p . ( <<) and.t.,e rsximu.",. a>lo~. ble moisture content was established at -15oF dewpoin. at line pressure (see FSM Sec.ion 9.3.1.2.2) .2). The results of the preoperational test-ing o, instrumnt air quality are tabulated .e i n T a bl es 1 and These resultu ts show that preoperational testina verified that the instru.men. air systems for both uni:s mee: the r>oisture and oil con.ent requirerents of !N5'/ISA 57.3-1975.

~O 0

~li

13-MS-A20 APPENDIX C ESPOHSE TO GENERIC LErrER 88-)4 rage iodic verification during per or ~nce o~ PH

, p tasks consisted pr'imari)y of verifying the air qua lit y and oil content) imediate)y doxrstream of the afterfilt r for each set of drryers. Yerificaticn of moisture content (dexpoint) at the end of a representative feeder ) ine has also been performed on eight separate occassions. The PH .

acceptance criteria for raximvm a))oxable oil c t t i ppm (x/x) and maxir."u". a) )oxab)e moisture Th 1 t f th'H o conten. has consistently been verified to be 0 rrr a found to exceed the PH accep-a o - . 1n these cases c orrec ive maintenance xas t yp ica cally required to restore the dexpoint o ess than -60oF. Vhi)e thee d expoint has been fovnd to e ~ acceptance criteria in several instances typically due to a ma)funct'ioning solenoid va lve as"ociated dryers), the dexpoint has s ill consistently been verified to be less than the MSI/ISA S7.3-)975 reqvirement ne pressure. This demonstrates that the YEGP instrument air system design is such that high ua .ty 1 vnctionlng system ccmponent.

Yerificatjon off p arti culate size has not been performed as a part o, the PH verifications of instrument ai

. on has not b en considered recessary for th e

~

same re~son as stated previously r for not performing such ver fication during the preoperationa) tests for the instru-ment air sys em. Hoxever as a par o f th e 'nspections

~ ~

per.orated per PH checklist SCL00285 "Yalv a ve / Damper Stroke the local a air filters/regulators for approximato)e v . sa,ety related air--opera.ed .valves xere inspected'urin'ng the ~ e Unit I erst re ueling outa . g e ((Fall a , 1 9SS). These inspections ver i-a no c eaning or replacement of the aairr i ters, vas fil required. Yo g t)e Elec ectric Generating Plant cons iders tha t pe- od i c inspec ion and c ea ninng or rep)acement as necessary 1

ese oca air filters for each safety re)ated air-operated component is an appropriatee methoC me o o ensvring that

. a r quality is raintained consrstent x> th the r<nu f actur ers' eco~..~a'o such suc periodic'nspections is discussede 1 a.er in this response.

~ Additional inp)ant testing of the operatin System consisted of verifyin th nstrument air feeder lines. The results of this testing are tabv)ated in Tablee 4 . These results shox

13-MS-A20 APPEHDTX C RESPOHSE TO G=HE~)C LE~ R BS-)

age o that thee o'.l o~~ content and dexpoint xas again verified to me the requirement. of ANSI/ISA 57.3-197". Thiss testin est ng, com-bined xith:h .he periodic PM measurements of air quality, is considered as sufficient for reveri,ying the air. qua)ity testing results of preoperational tes'-"KB-0) f n t . The air quality testing results of preoperationa 1 test 2-3KB-0) for YEGP Unit 2 are still considered current.

and therfore reverification of'hose resvl-ts is not con-sidered necessary at this tine.

Yogtle Electric Generatin g P an( concludes that the above testing has een su ficient to verify that actual instrument air system air h the rznufacturers'ecornendations for n v ua 1 components served. This conclusion is made based on a rev ex that was conducted oof the manu,C acturers'iterature associated individual air operated o components. This-reviex indicated that e certain recorrzndations, such as 'filtered " "dry "

free " havee bbeen made C or the supply a ir, quantitative a ir quality requiremen s have not boen specif ed. Th bo d veri, ed moisture and oil content to be consistent xith the quan-titative requiremen.s of AHSJ/)SA 57.3 1975 - and the ins s ni 1) vel i ied particulate si-e to be acceptable or instrument. air as supplied to the individual components. There-fore, the instrument air system air qua)ity is considered as bavin en veri, ied as consistent xith the rwnufacturers'ecoin ndations.

Tes.inc o, air quality for the diesel generator air start system has also boen accomp)ished for YEGP Units P diesel g .. air s.art system xas 1

supplied by and 2. Th e V~G Transamerica (Hote: YEGP diesel generators are also Transameri'ca De)ava)) and Delaval.

consis:s o txo separate co+ressed air systems or. trains per d eac individua) train consisting of one suction filt

. on i ter, com-pressor, a.tercoo)err, aa'.r dryer, and air rece i ver. Doxnstre am of y- ra ner/fi)ter for removing particulates dni tolib urther downstream. filters exist for the starting air s r utor and for the engine control anel.

r er a for the th YEGP diesel air start system has been es.a~ s ed as 50oF at system pressure .(see FSM Tab)'e 9.5.6-)).

This dexpoint criteria xas established ba d h

o. .he air start system, the ',act that the ai n . ~ and <50 psig, xhich raises the dewpoint, and the minimum diesel generator room design temperature o 50o". '

. P reoperationa 1 tes. procedures 1-3KJ-0) Diesel Genera T

'+ ' '1-3KJ-02 ~'Diese) Generator Train B 5 ar S'

Sys em (Unit 1;,

~ ~ ~

ing Air Sys.e... (Uni: 1)., 2-3KJ-01 Diesel Genera T ys.e~ (Uni: 2), and 2-3KJ-02 Diesel Genera. or Train 8 Startino air contained in each receiver. The re veri. ication of dexpoint are tabulated i n jab>e . These '.

Ai Sys.em (Unit 2) included a verif ica:ion of dexpoint for s:ar.in ressu ).s of thi s preopera t iona) h'.

h resu):s

13-HS-A20 APPENDIX C RESPONSE TO G=- NERIC LETTER BS-14 rage 4 shox. tha: the, de+point acceptance criteria xas net for all but the

.I.'o. 2 air start train for the Unit 1 P" diesel. After replacement of a bad condenser fan ro:or and recharoing the dryer xith refrigerant, this air start train xas also verified to neet the dexpoint acceptance criteria.

Testing of the diesel generator air start system for particulate and oil content is not considered necessary due to the system design xhich includes the previously mentioned y-strainer /filter and doxnstream filters. Transamerica Delava1 (nox IHO Delaval) has specified the exact filters to be used in these applications. These filters are periodically inspected and cleaned or replaced in accordance with the generic aaintenance recornendations developed by the Transarerica Delaval Oxner's Group (see Appendix 11 of the TDI Diesel Generator Design Reviex and Qua'lity Reva'lidation Report-YEGP: Note: This report xas previously submitted to the HRC). The YEGP program for performing these periodic inspections is discussed ies in more detail later in this response.

A review xas conducted o, -Transamerica Delaval recornondations and of the recommendations developed by the Transamerica Delava1 Oxner's "ated Group. This .reviex indicated t that mantita:.ive air quality ure requirem nts have not been specified for the diesel generator air I s art system. Therefore, YEGP considers that the air quality testing :lons per,ormed during preoperational tests 1-3KJ-01, 1-3KJ-02, 2-3KJ-01, ll and 2-3KJ-02 xas suf icient to verify the air quality oi the air star. systems for, Units and 2 consistent xi h the 1

'iesel r'znufacturers'ecornendations.

I.em Veri,ica.ion ha ra intenance practices, emergency procedures and training are adequate to ensure tha. safety-related equip-ment vill function as in'.ended on loss of instrumen air. al A. Ac.ion Plan:

Evaluate current rr~intenance programs and practices to deter- 1 mine overall adequacy for components x',thin the scope of the il generic letter. ~ve

2. Reviex plant procedures desioned to mi:igate the e fects o a loss of instrumen'ir.

ry

3. Reviex the .con ent and scope of raining programs for -C adequacy in the area of required response to a loss of s instrument air.

3

13-MS-A20 APPENDIX C RESPOHSE TO C=. HERIC LETTER 88-)4 rage ins rvment afr fs not available. EOP 19002-C Rev. 6, includes a note prfcv to St '*'oiooxn,"

4 t ig .hat r~keup to the vo)um control tank fs not possible xithou fnstrumen afr available At h oF EOP )&C30-r Stea.". Genera'.or Tube Ruptvre," Rev. ?, ro-vides instructions for establishing c h arg f ng flox without run air available and appliess too .ep ins .rument procedure. r S'2 o that The t yp es of procedural controls as discussed above are con-sfdered adequate for ensuring that safety-related afr-operated corn p anent n s w>)) function as intended on loss of

3. Training

'i Current trafnfn g for 1 censed operators includes lesson plans, 1 instr uct iona units, and simulator exercises as 1

i ol )oxs:

LO-'LP-,02) ) 0 'cService and Instrument Air

'Start Air Systems'O-IU-021)0-001 p,

"Respond too jns 'n rumen Air Syste".

Compressors'O-IU-02110-002 to Service 7 fr Sys er, A)ar's

'lar;s'-003 "Respond LO-'.U-02))0-00'espond to a Loss o; Instrv:ant Afr to Conta fnment" LO-SE-60019 RHR Operations Kith Ha lfunc.fons" LO-'SE-60023 'Coo)ant h Feedxater Loss of Instrument Air LO-IU-60321--001 "Respond to Loss o Instrument Air'esson Plan LO-LP-60321 fs based on .abnormal operating procedure (AOP} 18028-C and Hc)u" t detect a loss of instrument airr, response r of critical components ss o nstrvnent air, hox to compensa e for cer ain cri ical components ass'umin g failure po ion ic

- -- 0019 introduces a loss of instrument air dvrin o associated ith plan shu doxn (Hode 5'nd } d '.1 n ro vces a oss of irstrv. ,s rvment air. during poxer opera .'io (H o d e '} i}. The operator is' expected ex ec to uti)ize the 2 -C for res p ondin to both sfmu,lator exercise scenarios.

Current training for non-)icensed operators o includes lesson plans and n i ns.ructiona) vnits as fo))oxs:

HL-LP-02201 Service and Instrument Air Systems 0<<side A ea Opera or'

13-HS-A20 R PONS TO G NERIC LE~"R gg 14 Yage b HL-LP"02301 "Serv f ce and Instrument Af r Syste"s-Turbine Building Operator" NL-IU-02301-00-001 "Perform ServfcejInstrument Afr Start-Up Inspections" HL- IU-02301-01 "002 "Operate Air Dryers" HL-IU-02301-01-0 3

~

Bloxooxn Mofstvre Separator Drain Traps an B

Afr Receivers" H L- IU-02301-01-004 Cross-Connect Unit Compressed Air Syste s" HL- IU-02301-01-005 'Restore 'Instrument Air to Turbine Building Folloxing HL- IU-02301-00-006 Serv f ce Air Fol 1 oxf ng Isolation" Isolation'estore HL"IU-02301-01-007 Check Proper Operation of Rotary Air Compressor" NL-IU-02301-00-008 Chececk Proper Operation of Reciprocating, Afr Co~ressors" NL- IU-02301-01-009 "Check Operation o Hester Energy Conservator HL-LP-02401 "

"Service and Instrument Aft Systems Au"iliary Building HL-LP-53112 to Valve Ac uators Operator'ntroduction NL-IU-53112-00-001 'Verify Poxer-Operated Ya lve NL-'LP-531?0 to Basic Air Co~ressors" Operation'ntroduc.ion NL-LP-02201, HL-LP-02301, and HL-LP-02401 r enti ica ion o r~jor air-users ex ecte nis io a loss of instrunen air d

t HUR c. 6-12?5 sftfze the

.e nstrument t

Yo Th d'iscussfon of industr based on events described b y HRC Information Notice 87-28 ol. 2, and SOER 88-01 and is inteen ded to p lant e ~fpment i operator to the inpor.ance of air system and to problems xhfch could occur event t sen-nstrunen afr qva 1fty is alloxed to degrade.

Curren. training for maintenance personnel erso includes Lesson Air Opera or Hain enance xhich is pro" e to mechanicalcal raintenance personnel and GE-LP-1251 6, "Service and Instr nstrunen Afr, xhich is provided 'io h C personnel.

HE-LP-10003 provides training on thee basic asic purpose ur o and principle o opera.. )on on oof aaiir operators, various es o ir ir operators, gen ra 1 rafntenance e practices air . ra for trovble-o~n rec anical and o p erati.ional cause o, ir "ures, and includes a revi m o, HRC In o . .ion Yol. 2, and SO=R 80-0 si e the need to prevenn d egra d ation ' of the in s cerumen a ir system by alloxing forei .ore gn raterial such as oil', xater tenance. - 251'6 provides GE-LP-1251'6 prov i training on the purpose of

13-MS-A20 APPE>RADIX C RESP0"SE To ~HERIC LE)E'ER 88-14 age the instr'ur)ont afr syste" na)or co~nents, unc fons and floxpath, eaphasf:es that significant problems have occurred at various nuclear plants due to the conta)-.fnatfon of instruwn afr and ins ructs the s uden to observe for conta~ina fon A)le,per,or ing cafntenance on the fns ruwnt air system or co yonents serviced by fnstru~nt air..

The above described training for licensed operators, non--

licensed operators, and maintenance personnel has been r vfexed against the recccxzndatfons of hUREG-1275, Vol. 2, and revised xhere appropriate to incorporate those recorrwn-datfons. This tra'.ning fs considered adequate for ensuring that sa ety-relat.d equfprxnt xfll func )on as intended on loss of fnstrumnt afr.

G.L. Ite".- 3: Yeri, icatit on .ha ~ the design of'he ertfre instr .".~nt afr system includ'in g air or o.her pneumatic accu.",.ulators fs in accordance e

xfth fts intended,unction, including verification by test that afr-operated, safety-related co;..ponents xil1 perform as expected in accordance xith all design-bases events, including a loss of the norm.l instrument afr systen. This desion verifi t should include an analysis of current air operated cor)ponent failure positions to verify that they are correct for assuring required safe.y functions.

A. 'Ac.ion Plan'.

l. Iden" ify, by reviexfng plant design docur)enta ion, the sys e~ and co~onen level safety design bases.

.2. Create a lis of all sa>ety-related co)"..ponents xi:hin the scope of the generic letter.

3. R'eviex the testing that xas performed for each safety-related cor7onent xithfn the scope of the generic letter.

4, Schedule any additional safe.y-related co)"ponen testin es.ing required.

B. Re>Roose:

Sa. ety-related active ins.".ur)ent air use. s for YEGP Uni:s 1 and 2 are tabulated fn Tables 6 and 7. The curren. failure position for each of :hese co..-"n-." .. '~s in '

ec e aca ins:

t)>e .=Snà t A Tables and/or design calcula+io s

~

)he curren. failure posi:fons for these co)-.,ponents xere verified to b cor'rec. for assuring the required safety func ions

13-MS-A20 APPr.NDTX C RESPONSE TO G NERiC L T) ER 88-14 rage Nit>l exceptions as no ed below, loss o, fnstrune .r n t a r pressure perfo~d for the conponents listed fn Tables 6 and 7 during cons:n>ctfon acceptance testing for each unit. The air-operated valves l,fsted in Table 6 were individually-tested fn accordance with construction acceptance test CAT-H-04 '"

p t d Yalv s. The air-opera.ed danpers listed in Table 7 were individually tested fn accordance with CAT-H-07 "HYAC Pneu=atic 0 crated Dan p er s. This tes fng was perforned to meet c YEGP stated position of conformance to Regulatory Guide 1.68.3 which fs provided in FSAR Sec.ion 1.9.68.4 ~ 2 ~

Loss of fnstru~nt r mnt afr pressure testing performed per CAT-H-04 consis ed of placing the valve opposite to its f fl-position and then ver f fyfng the valve properly nerved en ve e io f t s fa f 1-to saie posi fon on slowl y bleeding off the afr from the actuator an, as appl icable on suddenly venting the positfoner or co- n-pp y p rt to atrosphere. Loss o> instrument afr pressure tes fng performed p r CAT-H-07 consfsted of placfng-the das".per properly raved to fts fail-safe positionn on sslowl ow y reducing the air pressure to the actuator.

The rzfn feedwater isolation valves (f.e., valves 'tHY5227, lHY5228, lHY5229, 1HY5230, 2HY5227, 2HY5228 2HY 2

) were not CATH-04 tes:ed. These valves are r hvd y rav lic es but recufre a source of air to perfor, their sa ety unction in tha: air-operated pilot valves ha t o a feedwa er isola ion si "nal o allow the fiow cf ydraul fc fluid to the appropriate side of the hydraulic iston.

'ervoirs and instrument afr rease .

y pp << instrument air pressure is e YEGP HFiY's are the sane valves as those des-cribed in NRC in oration Notice 85-35 and wnfch are used as nafn stear: isola fon valves at Byron Unit 1.. Foilowfn of No ice 85-35 the YEGP H"iY' r s were rndf fied by replacfn thee air check valves with those of a slf g htl. y df > erent design. The ah i i t of 1 o th ese air, check valves to seat on a gra grad ua i oss of 1

su pp lied i ns.runent afr pressure and to herefo e t i, lit abi y of the K<<iV's to perforn their safety func ion is periodically verified in accorCance with testing performed er Procedure 14850-1 (14850-2) 'Cold Sh u td own Ya ve Inservice Test." 1 Thiss testin T es. ng is considered adequate verification for thee HFiY's l 's required by the Generic Le :er.

ampers AHY12479, AHY12480, AHY1248l, AHY12482. IHY1250'.

1HY12605, iHV12506, 1HY126G7, 2HY12604, 2:--",".~':5.

- p a eC Campers, but are also equipped wl >. h an in',latable bubblee tigh seal. A source of air is ensvred vre b y a reserve air s.orage ins.

tank and an ins.rvnent air check valve for each Carper. A CAT-H-07 tes. was performed for h Ca~per s mich verified tha. each proper 1

APPE'ADIX C'3-i~fS -A20 RESP"-HSE TO GENERIC LETTER SS-14 Page

'l CAT-H-07 does not

'1 e bv bb'a fnclvde confirm "on le tfgh sea'.ls. There, ore 'YAO's xi 11 to perfor testing tha conff~ the proper o era'io eals on loss of fnstmuent afr These be s the tes ing of the inflatable bubble ti h. sea It could not be verif fed that Yalve 2HY12146, 2HY12147, 2HY121 2148, and 2HY1214 had been tested t ese o con r that the y mv pove to their proper posf fon pt of a Control Room Isola fon applicable) H'40's xi 11 be issue sued to per;om additional testing

.e o corpleted by 1 September 1989.

The adequacy o the diesel generator air start s fng precperationa 1 tests 1-AJ-C5 'Diesel

~ 'on, oa ejec ion, 5 Air S:arts, and 35 C tive Starts'Unit 1 Train A) 1-AJ-0 (

Tne five air starts :est cons fsted o veri contained su; ficfent air 'eceiver

.ed air cor.pressor de nergized and xith the redvndant: air receiver isolated from th e .di ese1 . ~

g ered adequate verff,ication as required by Use of safetty--r elated pneuwtfc accurvlators at Y.

to air accu;.v)ators for the H"IY's air a dbi'1 "f

~ gh d arpers eqvipped xith fnflatable seal

. e esel genera..or air sstart s st .. a f r receivers.

ar system The o ese accvrvlators to perfom their inn en d e d func-on on a loss of nor."al su e supplied air p u e xas veri, ied as

'I G. L. I tea 4:

~ Provide a discussion of the YEGP p ro og ran for o r~ ing proper A. Ac.fon Pla.n Revfex the instrument air oval u it.y "

p roogram and rake an. improve-B. Response:

Procedure 11M'-1 (118Ã-2) 'Turbine Bui1 din re fr~s the Turbine ""uf ldfn~ ng opera:or o er o cho ck pref il 2 and

~CI 0

13-XS-A2O APPENDIX C

'0 'G~ 'i-'R IC LE ~ i -"R 8$ -1>>ag e

-fterfilter differential pressure o l e ~ sture (dessicant-t .- ype)e. indicator located on each blossom o to own the p ref i 1t er and af C il e d in I e~ o a r ryers, to blo~dcxn the . e instrumnt air receivers to the ce i s t ure separator drains and C h k d bl d f th y p- ng ese nspections and bio& lo&cxns are performed shiftly.

Maintenance ce Pork or Ord r ers and jor Def icienc Cards are appropriate to resolve potential po ent a proble"s identified during these inspec ions.

Preventive Haintenance (PH) standardi s.an ardized checklist SCL00402 has na e to provide for periodical1 doil o t'i di t] dmstrean d

v'tely of the a"erfilter PH e

ifi or i

>t per f ns runent a r expoint and o>l content were re ects results obtained by repetiti e task 12'20006-001M-N.

b per;or-..~nce of this pre-Standardized PH checklist SCLQO~"2 h as been-originated vvide or a per iodic inspect ion of e y-related air-operated va.lve. lis

.' 'th e.air. f'1

~ i i

ters bl for to the r-

./ ir ter per this checkl i be inspected for contairirants such as o> i, ~a clogging or is physically dna d If inspec ions described by SCI 00"'32 h as b' en es abli h respond to the in erv a ls o f o th er remiredd i...ec. i.. "

in ons for the subject valves an ill and v 1 occur at either 24 36 r interva)s dependent on th e particular valve.

YE G P considers the above describede nspections ins and bio~downs to be a suf.icient u ~ c ent nethod to ensure proper air ual'ua,ty is re in-tained for the instruct . uren. a r syste-.-.

Procedure quires a

.11882-1 shiftly (11882 - 2)) 0 utside Areas Rounds Sheets" re-ceneral'. c.ion c. the diesel generator ins p ection r-y .en air conpressors. . Main 'en o  ; nd/o robl'er.:s iden-.', "

n.i 'e d during these inspec.ions.

"ed ist PM

~

de f'r periodlcacheckly per standardi SCL00166 has beon ornin a den . , ..

e

. f air con-ai n.aired in the diesel air s.art system"" air receivers for bo h ;:ni's I~ ~

13-'AS-A20 APPENDIX C TO <H~HiC LEl ic.R 88-14 age

~nspec ion of the y-strainer/filter, starting air distributor

. ilter, engine con rol cabin t fil er and the barring dev c r fo<<he diesel generator air start syste~ is performed on an 'End-o;.-Cycle'asis which corresponds t o th e g . n enance reco~ndations developed by the T rans-amiica Delaval De ava Sacr s Group. These inspe~iions are perfo~d per the instructions o'rocedure ZS714-C "EOC Diesel Generator Checkout and were completed ie for or the n t i ie Unit 1 diesels during the recentn~ Unit n 1 re ueling ou age (reference Y~'0's 8806319, 18806320, 18806321, and 18806322).

18806

'EGP considers th above described i nspe c . i ons to be a suf-c en rathod to ensure proper air quality is ~intained for thc oiesel generator air start sys m

0 0

I

~O

13-MS-A20 APPB.'RADIX C TABLE E~TI~ T~ ~01 1 (L".fIT I)

IX57ZPFM AIR /VALI..Y D'TE LO 'TJQ( DEVOID OIL CCXTB(T 10/30/86 Afterfilter "A" Di scharge -60oF 0 ppe 10/30/86 Afterfilter "8" Discharge ?2 F 0 ppn 1Q/30/86 Turbine Bldg. El. 195' -50oF 0 ppm 10/30/86 Bldg. El. 245' -60oF 22D'urbine 0 ppm 10/30/86 Bldg. Line 48oF 270'uxi'1iary Q pal 11/1?/86 Auxiliary Boiler h Cooling T~r 36oF 0 ppa TABL. 2 PR:-CPERATIGKAL TEST 2-3KB-01 (UNIT 2)

IX>T~T AIR QUALITY L~TI& DBPQ I XT OIL GKTEXT 06/04/88 After filter "A" Discharge -80oF 0 ppn 06/04/M Afterfilter "B" Discharge -SOoF 0 ppi"l 05/15/88 .Turbine Bldg. El. )":5' BOoF 0 ppfA 05/)5/88 Bldg. El. ~45' 80OF 220'urbine 0 ppfA 05/15/88 Bldg. Line 270'uxiliary

-80oF 0 p ply

41 Cl

13-MS-A20 APPENDIX C TASI >>

~ ~~ (,T,)

IX5i~MfT AIR q" LITf LCCATICX OEWOINT OIL CGA@Ã

]1/18/86 (1861976") After, i 1 ter "A" Df scharc~e -SooF 03/15/S? (18703110) il Af ter> ter "8" Discharge 350F 06/29/87 (18705688) After> fl ter "E" Discharge -4P'

. 11/05/87 (18?08997) Afterfilter "B" Discharceg :6. SoF 11/19/87 (18708995} Afterffl ter "A" Df scharge -BooF

.'2/03/87 07/19/88 (1S71187?)

(188Q429?) Aft> ~

After.ilter "8"

'r" After, i 1 ter "A" Di s<" ce. ~

Discharce Discharce BOOF OoF SQOr 0 ppm 0 ppni 07/26/88 (18804'61) After>ilter "A" Discharce -sooF <1 pp After,il er "8" Discharce Sooj <1 ppm 08/02/88 (18804615} Af ter>erfil ter "A" Discharce 63OF <1 ppm A'-erfilter "Bi> Discharce -74"F <1 ppm 08/09/88 (,18804802} Af er,ilter "A" Discharce -68oF 0 ppm After.ilter "8" Di'scharge -?2oF 0 p pm>>

OS/16/~~ (188O5141) After> il ter "A" Discharge Eoj 0 ppm A; i l ter "8" Di> scha rce 73OF O,ppm I h C Shop Line -SooF 08/23/88 (188O540O} Af erfil ter "A" Discharge -?OoF 0 ppm A,:er >1 ter "B>i Discharge -78oF 0 ppm I h C Shop Line -BooF 08/30/88 ( 1880550? ) Afterfilter "A" Discharae -Soo Q pp~

Af er ilter "8" Discharce J

-78o 0 ppm>>

I h C Shop Line -SQoF Q9/06/88 (18805661) Af erfilter "A" Discharce BooF 0 ppm Afte~il ter "8" Di scharce -Sooj 0 ppM Con rol Bldg. Level 8 -Boor 09/1 '/88 ( 1880 833) 'A'ter-.;',l ter "A" Di scharce -SOoF 0 ppm

+'t ~I j>>~

~

y

>> ~

I ~ Q>>>> .,'rr'> )r. SOcj 0 pram 09/21/83 (188060 6} l%>> I.e ~ >> ~

>> Booj 0 ppm

~ C

.er. i l:er ""-" Df scl arce -.Boo j o ppm i h C Shop Line

13- MS- A20 APPENDIX C TABLE 3 Continued)

W CmCXS (mIT 1)

INSTR'~ AIR QJ'LIT<

DASH (~ LGC'TIN DF ~POIh 7 QIL Ct:XTeX Qa /27 <<BS ( zoo, ~

<< '7) After ilter "A" Discharoe -6?OF 0 ppn After,ilter "8" Discharge ?Qor" 0 ppril.

Control Bldg. Lev~! 8 -7? Or 10/0'/BS (18 o273) Afteri i-1 ter "A" D'ischarce -71OF 0 ppn Afterfilter "8" Disc>larce -71OF 0 ppn>

10/05/88 (18806475) After, il ter "A" Discharge -soor 0 ppn>

Afterfilter "8" Discharge -SGOF 0 ppni Control Bldg. Level 8 sooF 10/22/BS (18806?27) Afterfilter "A" Discharge -68O= 0 ppn Afterfilter "8" Discharce -68or 0 ppn>

10/2o/88 (18806oos) Afterfilter "A" Discharce -68OF 0 ppril Af terf i 1 ter "8" Di scha roe -68OF 0 ppn<<

11/l 5/BS ( 18807138) Afterfilter "A" Discharoe 2ooF 0 ppril Afterfilter "8" Discharce -20OF 0 ppni 11/21/88 (18807315) n.... '

) l>>~>>C i'<<er e a

~ Di scharae

-2OOF 0 pprrl A- ter-. <<1 er "8" Di schargo -20OF 0 ppm 11/2o/BS (18808a4} Af erfitler "A" Discharce -soar" 0 ppril Af er. il ter "B><<Discharge Boo>> 0 ppn 12/O6/8" ( 188OS38 5 ) After;ilter "A" Discharae. -8OoF 0 ppn, Afterfilter "8" Discharge 5oo 0 p pril 12/16/88 ( 18808653) Afterfilter "'" Discharce -76OF 0 ppn A'erf i 1 ter "B" Di scha rae -61OF 0 p pril 12/20/BS (18808654} A, terfil ter "A" Discharce 6ooF 0 ppn A, erfilte. "8" Discharce -60oF 0 ppiil 12/27/88 (18808655) After;ilter "'" Discharce 6loF 0 ppn A terfil er "8" Discharg-. 4 3or>> 0 ppril 01/03/89 (.18808854) >

f te fl 1 -er C ~

-46OF 0 pea e te . fl 1 t e t

> 8 0 l s c i"ia r c <<'.

22or 0 ppn Ol/IO/So (18808g66) terfil ter ",'." Discharae 8Qo>> 0 pon

', te. fil:er ""-." Dl SCharae -BooF 0 p

."...wasure~nt of oil con.er ~ ~as -" le~n i-,.-' eC n >>Gv

13-HS-A20 APPENDIX C Vg~c 4, SPECIAL TESTING (Unit. 1)

INSTNPEXT A Iil QMLITl'~

f 18900&3)

L{KATION OIL COiYEKT 02/03/89 Turbine Bldg. Level 1 800F 0 ppa 02/03/89' Control Bldg. Level B -80 F 0 pp1i 02/03/89 Auxiliary Bldg. Level D -BOoF 0 ppi"il 02/03/8o Diesel G nerator Bldg. 1A -80oF 0 p pixel 02/03/89 Diesel Genera-or B'idg. 18 -80 F 0 pplh TABID 5 DI:SSL 6:-R:-RATOR AIR START SYSlcN AIR ANALITY PREOP TiSTI46 OAr, pR=op AIR START TR'N D APPOINT ll/03/86 1-3KJ-0! 1- 2403-G4-001- K01 77oF 48 3oF 11/03/86 1-3KJ-01 1- 2403- G4-001- K02 77oF 48. 2oF il/04/86 1-3KJ-02 1-2403-G4-002-K01 79oF 49 ]oF 11/04/86 1-3KJ-02 1-2403-G4-002-K02 7ooF 61. 9oF 10/06/87 2-3KJ-Ql 2-, 2403-G4-001- K01 77oF 41. 4oF 10/06/87 2-3XJ-Ql 2- 2403-G4-00!- K02 77oF 4'2. 4oF 10/!3/87 2- 2-2403 G4 002 K01 6"-or 36. 3oF 3KJ-02'-3XJ-02 12/!1/87 2- 2 '03-G4-002- K02 7!oF 40oF

P. ~Wi~~

13-MS-A20 APPENDIX C TABLE 6 SVCTlRD IN~i~ AIR USERS ACTIYE YALYES- -

AIR FILTd'.

YALYE KGEL Slc=(H FHV, FSAR RrF P05ITI

}HY}300c FISH" R P5Q5 50 FHEA-FSAR CLOSED 2HY}300cA TABLE 10. 3. 3-1 1HY130058 FISHER P595 50 FH:"A-FSAR CLOSED 2HY 130058 TABLE 10.3.3-1 1HV13006A FISHER P5Q5 50 FHEA-FSAR CLOSED 2HY}3006A TABLE 10.3.3-1

)HY130068 FISHER P5Q5 50 FHEA-FSAR CLOSED 2HY}30068 TABL '10.3.a-)

)HY13007A FISH.R P5Q5 50 FHEA-FSAR CLOSED 2HYi3007A TABL 10. 3. 3-1 c 1HY 13007 B 2HY130078 F I SHER p5Q5 50 FH=A-FSAR TABLE 10.3,3-)

CLOSED

)HY}3008A FISHcP P~Q5 50 FHEA-FSAR CLOSED TABLE )0.3.3-)

2HY}3008'HY130088 FISHER PSQ5 FHEA-FSAR CLOSED ZHY130088 TABLE 10. 3. 3-1

) HY760&~ CO'(OFLOA FH-20 35 FHEA-FSAR CLOSED 2HY7603A TABLE 10.3.3-1 1HY7 6038 COiROFLOM FH-20 FHEA-FSAR CLOSED 2HY7 6038 TABLc 10.3.3- I 1HY7603C CONOFL04 FH-20 FHEA FSAR CLOSED 2HY7603C TABLE )0. .3-)

(Con;)nues) l

0 0

0

13-MS-A20 APPENDIY C TABLE 6 (Continued}

SArt.l I)ST@'~

-~lc9 AIR USERS

-ACTiYE YALY.S-AIR FILieR VPLYE Yc.",OOR KGE'IL(H RB-FSQ R:-F.

1HY7603D COHOFLOV FH-20 35 ,FH- n" FSnR CLOS 2HY?6030 TABLE 10. 3. 3-1 1HY5280 F ISHER 6?nFR FH~-FSnR CLOS 2HY5280 TABLE 10. 3. 3-1 1HY5281 FISHER 6?AFR 40 FH~-FSnR CLOS!

2HV 5281 TABLE 10.3.3-1 1HY3502 F ISHER 67nr R HO'ii CLOSE 2HY3502 1HY8823 FiSHER P-594-1 40 HONE CLOSE 2HYSS23 1HYSS24 FiSHE? P-594-1 40 HONE CLOSE.

2HYBS24

'.HYBS'3 COHO-'4 FH-20 HO'ii 2HYBS4 3 CLOSE.'LOSEt 1HY 8881 COHOFLO'4 FH-20 HONE 2HYB881

/

1HY27 901 COMOF L(N GFH20XT1782 35'ONE CLOccT 2HY27901 1HY887 1 I SHER P594-1 40 HONE CLOSEC 2HY8871 1HY8954 F I SHER P59>> 1 40 CLOSiD 2HY8964 1MY~~~ Fi SHER P594-1 40 HOH. CLOSED 2HY8888 1HYBSSO HG.":= CLOSiD 2HYBBSO 1HYS1 "0 COHOF LO'x' FH-20 CLOS-"0 2HYS160 lHY8152 USHER P 594- I IiOI ~

CLOSED 2HYS'

( COO w iilVGQ )

13-i6-A20 APPENDIX C TAB>~ 6 tC t;~n~)

c. I a-IXSTrr3RDfi AIR USc,PS

- -ACTIYE YALYE5- -

AIR FILTiR YH.Y:- KGEL SIN(P() ~FSAR Roc PGS Ii 1HY8825 F I SH""R P-594-1 40 HONE CLOS 2HY&o2 1HY8890A FISHER P-594-1 40 HONE CLOS; ZHYSG90A 1HYo&908 F I SH. R P-594-1 NONE CLOS!

ZHY8890B 1HY8033 COHOFLO'ii FH20XTKXGBI 35 HOli". CLOS.

2HY8033 1HY8047 COHOFLO'ii FH20XTXXGB1 35 HOH. CLOSE, 2HY8047 1HY8028 CO"0 LO FH20XTKXGBI 35 HOH= CLOSc.i ZHYSO28 1HY 3513 FISHER p>o5 HO'i- CLOS' 2HY351'3 lYYZ514 FISHER 6/nc R 40 HONE CLOS".D 2HY3514 1HY3507 FISHER P595 50 HON" CLOSED 2HY3507 lHY3508 FISHER 67AFR NON"" CLOSc.D 2HY3508 1HY5278 FISHER 67@FR 40 F".EA- FSnR CLOSc.D 2HY5278 TnBLE. 10.3. 3-1 1HY5279 FISHER 6?nFR 40 CLOSc,D 2HY5279 TABLE 10.3.3<< I 1HY7699 COHOFLOA FH20XTXXGBI <<5 NONE CLOSc.D 2HY?699 (Conti nveC )

13-MS-A20 APPENDIX C

~

~

TABLE 6 (Ccnt1nved) t INSTR'~W AIR US~

-ACTIVE YALYES AIR FILTER YAL~E YEGG KNEL 5 I c" (M) ~-F~~ REF. POS I

)HY?80 CONOF LOP GFHZOXT1782 35 NON" CLOS!

2HY?80 1HY781 CONOFLO'4 GFH20XT1782 35 'ONE CLOS:

2HY781 1HY? 126 CONOFLOA FHZOXTKXG8) 35 NONE CLOSE ZHY7)26

)HY?150 CO'i0"LOP FHZOXTKXGB) 35 NONE CLOSE ZHY?i50 1HV9385 CONOFLQ'4 GFHZOXT)782 35 NONE CLOSE ZHY9385

) HY93/8 FiSHER 6? AFR 40 NONE CLOS:.i 2HY9378

)HY)5)98 GFHZOXT'1782 35 F "n-FSnR CLOS".2 2HY15)c8 CONOFLO'x'ONOFLOM TABLE 10. 4. 9-4

)HY15197 GFHZOXT1782 35 FMD-FSAR CLOSER 2HY)5197 TABLE 10.4.9-4 1HY)5)aa CONOFLO~ GFH20XT)782 35 F.. A-FSAR CLOSED 2HY)5199 TABL 10 4 ' 4

)HY15)a6 CONOFLOM 6FH20XT)782 35 FMEA- FSAR CLOSED 2HY)5196 TABLE )0.4.9-4 lCY9446 FiSHER 67A F R/6?F R 40 NONE CLOSED 2CY94'6 lCY9447 FISH.:R 67nFR/6?FR 40 NONE CLOSED 2CY9447 (Conti nved) 4

13-iiS-A20 APPENDIX C TABLE 6 (Continved)

IKS>xUMCf hIR USERS

-hCTIYE YMY~ -

hiR FILTiR KGEI S I &(H FYM-F~e'EF iHY8145 FISHER P-594-1 40 F I G. 3. 6. 1-1 CLC 2HY8145 (SHEET 25)

'1HY1 521 FISHER P595 50 CLC 4'HV15214 1HY10957 CONOFLOM GFHZOXT1782 35 CLO.

2HY1095?

IHY109~% CO'tOF LOV GFHZOXT1?82 35 HOhE ZHY10953 CLO.'1HY.i 5212A FISHER P595 50 ZHY15212A TABLE l0. 3. 3-1 CLO'LOS IHY15212B F I SHFR P595 50 FHEA-FSAR 2HY15212B TA"LE 10. 3. 3- I 1HY 1 521 ZC FISHER P505 50 F A F SAR CLOS 2HY15212C i~aL 10.3.3 I lHY15212D FISHER P595 50 FY:-~- F SAR CLOS:.

2HY'52.'20 TABLE 10.3.3-1 1HY15215A FISHER P595 FHEA-FSAR CLOS:

2HY'.5216A T'BLE 10. 3.3- 1 1HY15215B FISHER P595 50 FHEA-FSAR CLOSE, ZHY15Z16B TABLE 10. 3. 3-1 1HY15216C FISHER P595 50 FHEA-FSAR CLOSE 2HY15216C TABLE 10. 3. 3-1 lHY152160 F ISHER P595 FHEA-rSAR CLOS".

'ZHY}52.'60 TABLE 10.3.3-1 (Con-inue~~)

5

13-MS-A20

~ N

~ ~ APPENDIX C IN5i~5PE3fT AIP. LM~

AC i i YE VAL. ~

AIR FILTER YP'E YBlOOR RXEL SI ~(Y) M-FM REF.

1LVoa59 F I SHER P 594-1 40 NONE CLO.

2LY0459 1Lvoaeo FiSHER P 594-1 ao NONE CLO'.

2LY0460 1HY8153 FISHER P 594-1 NONE CLOS 2HY8153 l.,v8154 COHOFLOA FH-20 NOH" CLOS 2HV8154 1YY 5227 WATTS F-602-"EJ 40 NOHE CLOS!

2HY522?

1HY5228 5 F-602-4EJ 40 NONE CLOSE 2HY5228 1HY5229 WATTS F-60?-4EJ =

40 HONE .

CLOSE 2HY5229 1HY5230 WATTS F-602-4EJ 40 NONE CLOSE.'-

2HY 5230 AHY19722 COHOFLO'.I GFH20XT1782 35 NOH. CLOSEi AHY19723 CONOFLOM GFH20XT1782 35 NON. CLQSEC Assu'as failure position on feed~ater isola.ion signal

13-HS-A20 APPENDIX C TABL< 7 S Fr. Y Ri LAIC)

IÃSTR SET A}g LgERS

-ACTiYE D~ERS-----

~

~R YcÃCCR '~LF/LTM A}R STZ:"(H ~M-FAR REF.

AHY2534 NOR GREH F}2-4MA3M 50 TABLE 9. 4. 2-2 AHV2535 HORGREH F}2-400'H 50 TABLE 9.4.2-Z AHY2528 HQRGREH F}2-400A3H 50 TABL 9. 4.

/ 2-2'ABLE AHY2529 HORGREH F}2-400n3M 5Q 9.4.2-2.

AHY}2%2 HORGREH -

F}2-400A3H 50 TABLE 9. 4. 2-2 AHY}2&} HORGREH F } 2-400A"'f 50 T'Bi ". 9.4.2-2 AHY12479 HORGR" H'i 2- 4nQnBH 50 TnBLE 9 4 2 2

~ ~

AHY}2480 itQRGR.!/ F '} 2-400n3H 0 TABLc o AHY}2152 HORGREH F12 400n3H 50 TABLc 6 4 4 AHY}2'.53 NQRGREH F12 400A3M 50 TABLE 6.4.4-1 AHY}2162 HORGREH F i >-400n"."..50 TABLE 6.4.4-1 AHY}2i53 HORGR:-H F}2-400A"M 50 TABLE 6. 4. 4-1 1HV12505 HORGR".H F'.2-400A3H 50 TABLE 9. 4. 3-5 2HV}2605

}HV}2607 NORGREH "c1 2-400A3H 50 TABLE 9. 4 ~-5 2HY 12607

}HY12604 XORGR" H F12-400A3M 50 TABLE 4,4.3-5 2HY}2604 1HY 12606 NORGR-:H Fi2-400ABH 50 T'BLE 9.4.3-5 2HY}2506 1MY1 2146 HORGR="N r l 2-400A~ 50 T'BLE 6.4.4-.}

ZHY}2146

}HY}2147 XORGREH F'2 40QA ',, Q TABl ~

6. 4. -'- }

2HV}2.'7

}HV}2}A XQRGR H F 2- 'OQ'H 50 TnBLE 6. 4. '- }

O. 2HV}2}43

13-HS-A20 TABt '

APPENDIX C (carlyle)

-RELAi Q I~iR~G'IR tJSEW

- ACT IYE Mi?ERS- --

AIR FILTER:

'AWr.R Y~ KeEL

~

SIZ:-(X .,~~F~~ REF 1HY12149 HORS R N F12 400n 3H 50 TABLE 6.4.4-1 2HY12149 1HY2626B FISHER 262C HONE 2HY2626B 1HY262?B FISHER .,262C HONE ZHY2627B 1HY26288 FISHER 262C XONE ZHY26288 1HY262oB F I 5 HER . 262C HONE 2HY2629B 1HY2636A HORGREN F}2-400'3H 50 TABLE o 4 5 3 1HY26368 HORGREH F}2-400A3H 50 TABLE 9.4.5-3 1HY2638A HORGREN F 12- 400A3H 50 TABLE 9.4.5-3 1HY26&8 HO?GREH F12-400A3H 50 TABLE 9. 4.

5-3'ABLE 1HY 12562 BALSTCN 9,.4.5-3

'1HY12563 BALSTOH TABL" 9.4. 5-3 1HY12595 FISHER 67AFR 40 HOHE ZHY12596 1HY12597 FISHER 67AFR 40 HONE 2HY}2597

}TY}2086/}2086A HORG REX F}2- 400n 3,", 50 TnBL 9. 4. 7 2TY}2086/12086A

}TY}2098/}2098A HORGREN F}2-400A3H 50 TnBLE 9. 4. 7 2 ZTY12098/1 Z098A

}TY}2085/} 2085A (US. 5 F ILTE? OH }TV}2098) o 4 7 2TY 1208 5/1208 5A (US=5 FiLT R 0'> ZTY}2098)

}HY}20)0 HOPGRE'i F}2-'00'3 <0 TABLE 9,4.8-2 2HY}2010 These are elec:ric Ga...gers ~i:h air ope a ed guLb}e igh: sea~s does no: assume 'ai }Ul 4 pos l ion on ) os; o; ins:r.-.zn..a i

13-MS-A20 APPENDIX C TABLE 7 (HNTIXJE3)

LJ IXSTRU~

AIR ACTIVE DAN USES E2S--'-

N.~EP~ VEXmm ~'IZ:-(~

AIR FILlM M-FSQ REF.

1HY 1 2010n HORGREH F12-400A~W 50 HONE 2HY12010A 1TY12095A/12095C HORGREH F12-400A aH 50 TASLE 9.4.7-2 2T Y12095A/12095C 1TY12095B/120950 HORGRcH F12-400A3H 50 TABLe 9.4.7-2 2TY12095B/120950 1 TV12094 " /12094C HQRGREH F12-400A3H 50 TABLE 9;4.7-2 2TY12094A/12094C 1 TV12094B/120940 NORGREH I 2-400A3H 50 TABLE 9.4.7-2 2TY12094S/120940 1TY12096/12096A HORGREN F12-400A3H 0 TABLE 9.4.7-2 2TV.12096/12096A lTV12097/i 2097A (USES FILTER 0N 1TV12096} TABLE 9.4.7-2 2TY12097/120o7 (USES FILTER OH ZTY12096}

1TY12099/12099A HORGREN F 12-400AM 50 TABL- 9.4.7-2 ZTY120oo/1209oA lTY12100/12100A NORGR.N F12-400A3H 50 TABLE 9.4.7-2 ZTV12100/12100A 1TY12101/1210'.A HORGREH F'12-400A3M 50 TABLe 9.4.7"2 2TY12101/12101A

13-MS-A2a COMPRESSED GAS SYSTEM EVALUATIOÃ AND ANALYSIS APPENDIX D FAILURE 'DATA TRENDIVG REPORT FOR ADVs, FVIVs, AND MSIV's

13-MS-A20 CoiiPRESSED GAS SYSTEH EVALUATION AND ANALYSIS'ABLE D-1 FAILURE DATA TRENDING FOR HSIViFMIV FAILURES I

FDT NO. Co.fPONENT FAILURE DESCRIPTION CAUSE I

185506 1JSGAPT I Pressure transmitter had a Suspect plug (861022) 0233 I leaking fitting may have been(

dirty I

300073 1JSGEUV I Nl 4-way valve changed out One found (880613) 0171 I twice cracked, the I other dirty I

327201 2JSGAUY Accumulator was low in I 0170B I pressure Cause of loss[

I of N> I I pressure )

I suspect dirty)

I solenoid I valve I I I 269329 1 J SGEUV I Solenoid valve was blowing Several (880107) 0170 I air past seat leaking air I line fittings)

I I 231709 1JSGEUV l' Accumulator pressure on Leaky tubing/i (870615) 0171 precharge check was low fitting I

234562 1JSGEUV I Accumulator failed precharge Unknown N~

(870629) 0171 I pressure check leakage I l 269297 1JSGEUV I Accumulator dumped without Several (ssolo7) I

- 0171 I operator action leaking air I I line fittingsi I I I 269335 1JSGEUV I Accumulator dumped without Several (880107) 0180 I operator action leaking air I I line fittings(

l I I 269336 1J SGEUV I Both sources of air had to Several (880108) - 0181 be operated or valve would leaking air I

I t

I lift open line fittingsi I I I 206430 2JSGAPT I Fittings were leaking N> Loose I (870128) 0229 fittings.

I D-1

,13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS TABLE D-1 FAILURE DATA TRENDING FOR MSIV/FWIV FAILURES FDT NO. COMPONENT FAILURE .DESCRIPTION CAUSE I

300797 2JSGAUY I Solenoid valve was leaking Cause, (880615) 0170B I internally unknown I.

l 206430 2JSGBPT I Fittings were leaking N~ Loose (870128) - 0230 I fittings I

332657 1JSGEUV I Accumulator precharge Suspect due (881221) 0171 I pressure check failed low to thermal

'I changes I

flair 1

1JSGEUV Leaked at inverted Borken o-ringl 0180 I elbows I l 281575 1JSGEUV l Accumulator SEIS alarm Np pressure I (880227) 0180 l low due to l normal I operating I condition I

281575 1SJGEUV I Accumulator SEIS alarm N~ pressure (880227) .- 0181 I low due to I normal l operating l I condition l I l 281575 1S JGEUV l MSIV accumulator alarm N> pressure (880227) 0170 I annunciated low due to I normal I I operating I condition I I 237893 1JSGEUV I Accumulator failure pressure Suspect I (870/14) l 0171 I low pressure loss)

'I l was due to I thermal I changes l I

D-2

0

~ll

13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS TABLE D-l FAILURE DATA TRENDING FOR MSIV/FWIV FAILURES FDT NO COMPONENT FAILURE DESCRIPTION CAUSE I

281575 1JSGEUV I Accumulator SEIS alarm Believe due (880227) - 0171 I to normal I operating t condition I

192513 2JSGEUV I Output of regulators was low Regulator (861113) 0181 causing an alarm on SESS out of I adjustment I

2JSGEUV I Valve failure pressure test Faulty 4-way 0170 I functional testing valve suspect(

1 normal wear I

99003000 3JSGEUV I Accumulator pressure was low Normal (890117) 0171 I temperature I variations l and aging I caused I pressure to I be low I

298533 3JSGEUV I Oil was leaking from top Degraded (880604) - 0180 I of accumulator o-ring I suspect I l normal I I I wear/aging I I I I 153490 1JSGEUV Air/hydraulic pump should not Normal wear (860515) 0181 I produce full pressure on pump I I internal I I parts l I I I 192453 1JSGEUV I MSIV had service air leak Worn check I I (861126) 0181 . l valve I I I 1 I I I l I I I I D-3

0

~li

13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS TABLE'-1 FAILURE DATA TRENDING FOR MSIV/FMIV FAILURES I

FDT NO. COMPONENT FAILURE DESCRIPTION CAUSE I

224796 2 J SGEUV 4-way valve was not Suspect (870511) 0170 operating properly normal wear I I I 234022 l 2JSGEUV Hi pressure regulator Suspect I (870627) I

- 0170 diaphram was blowing air normal wear I I I l 259180 2 J SGEUV 4-way valve was stuck 90% Suspect I (871109) l 0170 l open normal wear, I l l aging I ~

l I I 299834 I 1JSGEUV Accumulator failed to pump Nl 4-way I (880611) 171 up after exercise valve I I defective, I I I normal wear I I I 118201 1J SGEUV Operator had low hydraulic Suspect I (851105) 180 pressure normal'ear l I I I 153464 1JSGEUV Valve closed and would not Suspect air/

I (860514) I 180 open oil pump I I I failure thru I I I normal wear I I I I 281354 1JSGEUV Air accumulator alarmed on Air pressure I (880227) I

- 0170 low pressure gauge out of I I I adjustment I l l normal wear/

I l I aging of I I I components I I I 310386 1JSGEUV Valve did not fully close Faulty 4-way

( 880815) I 0170 I valve normal l I I wear aging l I I I I I 333112 I 1JSGEUV' Accumulator pressure low Temperature

( 881230) 0170 I variations I I I and aging I l D-4

13-MS'-A20 COMPRESSED GAS SYSTEM.EUALUATION AND ANALYSIS APPENDIX E REFERENCE MATERIAL ASSOCIATED WITH PREUENTATIUE MAINTENANCE

13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS APPENDIX E REFERENCE MATERIAL ASSOCIATED WITH. PREVENTATIVE MAINTENANCE (PH)

PURPOSE This Appendix recommendnds preventative maintenance enhancements to increase the reliability of the CGS and to maintain proper gas quality.

Supplier documents fo f r maintenance and operation of various components within the Com P ressed Gas System S (x.e., Instrument Air and Nitrogen Systems) were reviewed to determine the recommended maintenance intervals. a s. SIMS R epetxtive or as s were reviewed to compare existing requirements with vendor recommendation.

RECOMMENDED PREVENTATIVE MAINTENANCE ACTIONS

1. Comment on Existing Repetitive Work Tasks The equipment/instrument listed in Table E-3 have a Repetitive Work task generated in the SINS data base which is not kept current. The due date currently given for the performance of the task is only an estimate for p arming purpose and is not an actual'ask performance due date. A review of the original frequency stated for the equipment/instruments listed in Table 3 shows that the original frequency is comparable to the manufacturer's recommended maintenance interval. Therefore, the Repetitive Work Tasks for the equipment/instruments listed in Table E-3 and E-4 should be changed to the original requirements.

2. Additional Preventative Maintenance Tasks Tables E-1 and E-2 identifies additional monitoring, inspection and/or preventative maintenance tasks that are currently not performed under, the PVNGS Repetitive Task Program for the CGS. These recommended tasks do not supercede the tasks that currently exist in the PVNGS Repetitive Task Program. Instead, the recommended tasks should be performed in conjunction with the existing tasks. For additional monitoring see Tables E-1 and E-2.

13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS TABLE E-1 ADDITIONAL PMs REQUIRED FOR INSTRUMENT AIR SYSTEM ITEM MAINTENANCE TEST I I

Monitor air quality for particles Test every three months (see Note 1). I and hydrocarbons. I I

Compressor free air regulator. Revise operations procedure to drain I these filters air least once a week or crack open drain valves to allow drainage.

I l I

I Compressor after-cooler. Inspect for evidence of leakage I yearly (see Note 2). I I

Safety valves. Manually "pop" the ~alves once for refueling to verify proper operation (Note 3).

Compressor solenoid valves. Inspect and clean (as'ecessary) on annual compressor teardown (Note 4).

Compressor sequence controller Adjust/verify proper operation during)

PIC-39 and PCV-43. r annual compressor teardown (Note 5).

I IA header nitrogen isolation valve Verify proper operation at refueling (IAN-PV-52). (Note 6). I I

E-2

13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS TABLE E-2 ADDITIONAL PMS REQUIRED FOR THE NITROGEN SYSTEM ITEM PREVENTATIUE MAINTENANCE TESTS l

Liquid Nitrogen Storage Visually inspect every 6 months in accordance Tank M-GAN-XOl with note 7.

I: I

(

Tank Pressure Buildup Move regulator through 10 PSI of adjustment and(

Regulator J-GAN-PCV-96 reset to original. setpoint every 6 months. See) note 8. I l I Tank Pressure Economizer Move regulator through 10 psi of adjustment and[

Regulator J-GAN-PCV-99 reset to original setpoint every 6 months. See(

note 8. I 1 I Calibrate Liquid Level Calibrate at every 6 months. See note 9. I Gage for "0" I I

/ I I Liquid Nitrogen Pump Perform maintenance per note 10 once. every M-GAN-P01A & B year or 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> of operation. Also perform maintenance every 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> of operation per note 11.

I Nitrogen regulators Perform maintenance according to note 12 once J-GAN-PCV-49, 49A, and 3 months.

J-GAN-PC-41 I I

Nitrogen Temperature Check for shutoff at -20F with refrigerant at Ualve J-GAN-TCU-48 every refueling. Reference 13-MM-104-55 Section f.8.c.3. This requirement is changed from the manufacturers recommendations since

[ the system must be taken out of service to perform this task.

l I Nitrogen Regulators Run the regulators through 20 psig of I J-GAN-PC-31 adjustments every 3 months. Return to I J-GAN-PC-38 ( setpoint. Reference 13-MM-104-55 Section I I I f.8.d.l. I I I I Nitrogen Safety Valves Test and reset every year. Reference I 13-MM-104-55 Section f.8.e.

)

J-GAN-PSU-29 & 36 I l +2 I l Rupture Discs Replace rupture discs every 3 years. 1 J-GAN-PSE-85 & 92 Reference 13-MM-104-55 Section f.8.e. I t

E-3

13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS NOTES:

1) ANPP's current PM Program does not inspect the piston rod packing and/or oil scraper rings. This testing will ensure that air quality is maintained and oil carryover does not occur.

2)) Inspect the tell-tale hole which is on the after-cooler for evidence of air or water leakage. Air or water will indicate seal failure that needs to be corrected

3) Manufacturer's instruction is to inspect once per six. months. However,,

inspection once per six months could cause undesirable transients on an operating unit. Therefore, inspection once per refueling is recommended. Reference M050.50.

4) If the solenoid is buzzing loud enough to be clearly heard at arm length, A then the solenoid internals need cleaning. These solenoids are upstream +~

of the after-filters and are supplied by air from the receiver which may not. be as clean as. the air required by the ISA standards. In addition, inspect proper operation of the cooling water solenoid isolation valve.

5)) P IC--3 9 should be inspected to verify that appropriate pressure signal (i.e., 3.15 lb.) is delivered to the adjustable bias ratio relays from the pneumatic indicating controller. The output of the bias ratio relays should ha acetified to assure PIC-39 is operating adequately shen the Qi.

compressors are shifted.

6) Verify proper operation of this valve once per refueling by isolating the nitrogen header on both sides of the valve and generating, a PSL-52 open signal. This task should be. performed at each refueling to avoid isolation of the IA system backup during normal operation.

7) A. Check for frost spot on outer vessel. These indicate a poor vacuum or a void in the perlite insulation.

B. Check the pressure in the vacuum insulated space if A. indicates Qg frost spots.

Check for ice buildup around relief devices and rupture discs.

8) Reference Tech Manual 13-MM-104-55 Section f.8.a.7

9) Reference Tech Manual 13-MM-104-55 Section f.8.a.6.

10)'emove crankshaft, connecting rod, and cross head assembly from bearing housing.

A. Check the two main bearings and the connecting rod bearing for smooth running while rotating by hand around crankshaft. If they feel rough, replace.

B. Disassemble wrist pin from connecting rod and visually inspect wrist pin and needle bearing.

E-4

13-MS-A20 COMPRESSED GAS,SYSTEM EVALUATION AND ANALYSIS If the" wrist pin shows either: 1) roller drag marks, 2) marks from abrasive particles, or 3) shows any sign of material removal of

'material removal or any other unusual wear, replace the wrist pin and needle bearing or bushing immediately.

Check cross head and bushings in the housing for wear or damage.

(Use of a drop light is recommended). If more than 20% of rubbing surface displays longitudinal marks from abrasive particles, replace bushings and cross head.

ll) A. Remove liquid'nd assembly (P1600-1002) from sump.

Diassemble all components.

Replace packing, push rod guides, sump gasket, and all O-rings.

D. Replace valve plate, discharge ball,, and valve body.

Visually inspect all other parts. Replace any parts appearing to be worn or damaged.

Check for dirt buildup on filter and in bottom of sump can. Clean and reuse.

12. Run the control valves through 20 psig of adjustment. Return to set points. Reference 13-ILL-10@-55, Section f.8.c.l and f.8.c.2.

-E-5

13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS TABLE. E-3 EQUIPMENT AND TAG iNUMBER LISTING INSTRUMENT AIR SUBSYSTEM I

AIR DRYERS l

J IANMSH0091; 0092 I

JIANPDIS0024; 0025; 0028; 0029 JIANPSH0093; 0094 RECEIVER JANP10018; 0019; 0020 COMPRESSOR JIANPI0044; 0046; 0053; 0054; 0055 JIANPI0102; 0103; 0104 JIANPI0121; 0122; 0123 JIANPSH0062; 0063; 0064 JANPS0071; 0072; 00?3 JANTI0114; 0115; 0116 JANTI0131; 0132; 0133 JANTI0134; 0135; 0136 JANTS0006; 0007; 0008 JIANTSH0056; 0057; 0058 JIANTSH0059; 0060; 0061 FTERCOOLER JIANTI0036; 0037; 0038 I

N I.

JIANPI0214; 0230; 0231; 0232 I PLOOP0032 PSL0033 i JIANPSL0216 I

) AFTFR COOLER I

(

1MIANM06A I

E-6

0 0

13-MS-A20 COMPRESSED GAS SYSTE'i EVALUATION AND ANALYSIS TABLE E-4 EQUIPMENT AND TAG NUMBER LISTING NITROGEN SUBSYSTEM Li uid Nitrogen Tank J-GAN-PSE-0095 J-GAn-PI-0094 J -GAN-LISL-0039 Li uid Nitro~en Pur.;

J -GAN - PSH-0116 J-GAN-PSH-0115 Nitrogen Low Pressure Manifold J-GAN-PI-0042 J-GAN-PSH-0076 J-GAN-PI-0078 J-GAN-PI-142 Hi h Pressure Manifold J-CAN-PSL-0004 J-GAN-PI-0040 J-GAN-PV-0038 J-GAN-PC-0038 J-GAN-PSH-0077 J-GAN-PI-0079 J-GAN-PC-0031 J-GAN-PV-0031 J-GAN-PI-0032 J-GAN-PSL-003 J-GAN-PI-0037, 0030 J-GAN-TIS-0117B J-GAN-PSHL-0140 E-7

Cl

~O

.13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS APPENDIX F LEAK TEST OF ADV INSTRtJMENT AIR

.CHECK UALUE

APPENDLC F 13-hIS-A20 BACK LEAKAGE TESTS OF ADV IYSTRU~1EXT NITROGEN C'iEC" 4'ALV~

Prepared For

~

Arizona Public Service Company Dr. Ramend.ra P.Roy Depar-ment o-" ~lecnanical g A rospace Engineering Ari=ona Sta-e Univ rsi-y y IoQo

APPENDIX F 13-MS-A20 A test apparatus for conductu>g back leakage tests of an ADVInstrument Nitrogen Check Valve divas set up. The tests mere. carried out at.two air supply pressures of 95 psig.and 80 psig.

The average leakage rates. at 95 psig and 80 psig ~ere 356 bubblesjmin. + 1'1'bubbles/min. and 297 bubbles/min. + 6 bubbles/min. respectively.

APPENDD: F 13-MS-A20 TABLE OF CONTENTS Section ~Pa e Summary Table of Contents List of Figures iv

'List of Tables 1.0 Introduction 2:0 The Test Apparatus 4 Procedure 2-1 2.1 Test Apparatus 2-1'-2 2;2 Test Procedure 3.0 Results 3-1 3.1 Test Data 3-1 3.2 Average Leakage Rates 3-'3

0 APPEilDIX F 13-MS-A20 LIST OF FIG~

Fic ere ~Pa e Fig. 1 Schematic diagram of the test apparatus 2-1 Fig. 2 A sketch of the check valve and the emit tube 2-2

0 0

~

~

APPENDLC F 13-VIS-A20 LIST OF TABLES Table Pace Check valve back leakage test data at air supply 3-1 pressure of 95 psig.

Cbeck valve back leakage test data at air supply 3-2' pressure of 80 psig.

APPENDS F 13-MS-A20 1.0 Ii~ODUCTION Tlte objective oi this project was to obtain back leakage test data for one 1 inch series, 000!L., stainless steel Y-type spring check valve with steliite metal'-to-metal seat. The valve 6000!b was to be insta!Ied in a horizontal position and the tests were to be conducted in accordance with ANSI/API 527, "Commercial Seat Tightness of Safety Relief Valves with Metal-to-Metal Seats".

The procedure outlined in this document was to be followed because no separate document is available for spring check valves with metal-to-metal seats. The leakage measurements were to be conducted at supply air pressures of 95 psig and 80 psig.

The valve was provided by Arizona Public Service Company (APS). A requirement was imposed that the valve not be welded or altered in any way during the tests.

13-MS-A20 2.0 TH E TEST APPARATUS AND PROCEDURE 2.1 TEST APPARATUS Figure 1 is a schematic diagram of the test apparatus. Air, free of oil and water, is supplied from an air accumulator (at 125 psig pressure). A ressure re ulator was installed upstream of the check valve tested so that the air pressure at the valve inlet could be J-Ro<

AIR Cat'RGB sR FIa-.eF F IL'IF IF epact'At.vt Q~ c

~ I JP~Ot-

~5 0 LA~>0 IF II FIIF F.

NJ A'TL'tt, AMOMVFA~R velvet Fig. 1 Schematic diagram of the test apparatus controlled. A 5/1 6 inch (7.9 mm) O.D. stainless steel tube with 0.035 inch (0.89 mm) wall thickness was installed at the downstream end of the check valve as per ANSI/API 527 requiremet]t. The discharge end of this tube was cut square and smooth, and immersed parallel to and 1/2 inch (12.7 rmn') below the water (distilled) surface in the water vessel. Figure 2 is a more detailed sketch of the check valve and associated fittings and the stainl ss steel tub=.

1

APPENDIX F 13-MS-A20 Pvc P~ //VM Q V'VC VIII.S (msgr(~~i~ 0-YsgS (~ O-rI~)

Aim t:;: iM

~ ~

~

i

~, ~ I

<">v<Y 'v s ~ ~

DIRECT>O4 )

Ch au Valve 5'jt( 0 D~

50 Pet<

$ 1~1

)

( Soa~r.C FWW DIRECT>ON )

S4.l~4IS 51M 4 a

,n 2

Vc.sS'M Fig. 2 A sketch of th'e check valve with the exit tube The PVC plugs and the stainless steel fittings on the ittiet and the exit sides of the check valve were subjected to soap bubble leak tests to ensure that they were indeed leaktight. The check valve was installed in the horizontal position for all tests. A pressure gage installed immediately upstream of the valve indicated the supply air pressure.

The air pressure buildup in the check valve exit tube was negligible because of mirtirnai resistance to air flow along the exit path.

2.2 TEST PROCEDURE Two seri s of tests were run at each of the tivo air supply. pressures (viz. 95 psig and SO psig). One series of tests corresponded to the check valve as obtained from APS. The second series of tests was'run after exercising the check valve by establishing air Qow in the normal 2-2

APPENDIX F 13 MS A20 direction tluough it several times.

At each supplv pressure, the valve leakage rate in bubbies per minute was determined b countu>g the. number of bubbles over a specific time interval. Since the bubbles emerged from the tube at rates too high for visual counting, the 'popping'ound made by each bubble as it emerged was depended upon for counting. Results obtained by this method proved to be quite consistent as catt be seen from the data presented in Section 3.0. A stop watch was used for establishing the counting time interval.

Some degree of independence between the various bubble count rates obtained was provided by having three different individuals participate in the counting experiment.

APPENDIX F 13-MS-A20 RESULTS 3.1 TEST DATA Table 1 Check Valve Leak Test Data at Air Supply Pressure of ~5~~si; Series 1 before exercisin the valve time interval second Leakage (". of bubbles 5.20 30 5.29 30 4.01 25 1.61 10 2.47 15 2.01 12 Average = 356 bubbles/min. + 11 bubbles/min.

Series 2 after exercisin the valve tune interval second) Le~dra~e (-" of bubbles 5.06 30 3.48 20 3.51 21 3.46 21 3.40 20 Average = 356 bubbles/min. + 10 bubbles/min.

~li ill

APPENDIX F 13-hIS-A20 Table Valve Leak Test Data at Alr Supply Pressure of 80 usta

'heek Series 1 before exercisin the valve time interval second Leat;a e (". of bubbles 8.13 40 6.28 30 10.23 6.25 '0'l5 50 5.15 Average = 291 bubbles/min. + 5 bubbles/min.

Series 2 after ezercisint, the valve time interval second Leal'.ace -".. of bubbles 5.96 30 4.06 20 3.96 20 3.91 20 Average = 302 bubb!es/min. + 6 bubbles/min.

3 2

APP.EMBLEM F 13 MS A20 3.2 AVERAGE LEAKAGERATES

. The average leaLage rate at air.supply prcssure of 95.psig was 356 bubbles/min. +

11'ubbles/tnin.

The average"leakage rate. at,air supply pressure of SO psig was 297 bubbles/min..+ 6 bubbles/min.

13-MS-A20 Conpressed Gas System Eval .ation and Analysis APPENDiX G Pneumatic Component Tnspection Results for Air Quality Concerns

13-HS-A20 Compressed Gas System Evaluation and Analysis A pilot p progran for pneumatic comxonent insoection ha- b een initiated ia ed ata pVNGS. The obgectives of the program are.'.

Inspect a samp}.e of pneumatic conponents fron unit 2 to gain confidence that no degradation of equipment has resulted due to pox,entially degraded air qu'ality durin'g past plant operations.

2. Gain" experience in the inspection of" pneumatic conponents for a proposed future p}.ant wide evaluation. The information gained from this pilot program will be used to write the inspection procedure for the greater scope statistical evaluation discussed in- section IV. F of this study.

Four 3/4 inch air operated 2-way norma}.}.y open pilot val from Unit 2 were inspected . These valves are part of the pneumatic control system for the Steam Bypass Control Valves.

In addition, four pneunatic positioners for the Atmospheric Dump Valves from Unit 3 wexe inspected. None of the components that were inspected showed any indication of deg adation due to potential air quality prob}.ems. A light layer of dust on some conponents was the only indicax,ion of contamination that was observed. There was no indication'f any hydrocarbon or moisture con amination in any active ax'ea of the pneumatic component.

The pilot valves f on Unit 2 showed the greatest spread in dust accumulation among components. One valve appeared to have been insta}.led for a considerable amount of tine while the other three valves - had significantly less dust accumulation and nay not have seen as much service. A tine in service determination could not be made since there no way to tie the specific valve to specific wor)c history. There are Four identical part numbered pilot valves on each Steam Bypass Contxol Valve pneumatic control system and the valve identification tags only stated which SBCV they came from.

The Atmospheric Dump Valve positioners from unit three showed essen ially the same anount of dust buildup from one positioner to another. A SI?15 work order search revealed that three of the positioners had been in service since staxtup and one had been replaced'n November 25. 1987. The amount of dust in the positioners was very light and had the consistency of flou..

The amount and si=e of dust observed on both the'pilot valves and positioners was considered to be well wxthin accepxabie limits and all components were considered to be completely functiona}. with respect to i nstrument air cone.amxnax.son.

Attached are the inspection results for each component.

13-MS-A20 Compressed Gas System Evaluation and Analysis VALVE AND DAMPER PNEUMATIC COMPONENT INSPECT10N Date. May 2, 1989 Unit.: 2 Parent component or component tag no. 2JSGNPV1003 Component name. Air operated 2'-way normally open valve Manufacturer. Ross Mndnl nn: 2752A5002-Manufactured: 1/78 COMMENTS:

General condition; The valve. when disa"sembled, showed evidence of considerable use as indicated by the valve diaphragm and control 0-rings wear condition of valve disk, and scxaping on the housing.

Exterior condition:

1. No physical danaae to housing.

2. Cap acre~a holding top flange and bottom flange have light. rust on all exposed surfaces.

3 ~ The diaphragm vent has liaht bx'ownish red accumulation of dixt, and oil mix. (oil is believed to be 0"ring lubricant.).

4. The pine thread sealant is limited to the thread contact area.

Process Side;

~ight brownish red accumulation of dust tyo matex ial is seen on the valve seat assembly. return spring, and inlet/outlet housing. Dust was dry and very f ine. The dust;, when accumulated. had the approximate consistency of flour. There is not enough accumulation of dust to obtain a sample for chemical analysis.

The inlet/out)et housing had sliaht, discoloration and staining on the aluminum. The source of thxs staining is unknown.

Control Side; The valve actuator bonnet inlet side paesaae to G-2

13-MS-A20 Compressed Gas System Eva'uation and Anal'ysis i

bonnet area is blocked off by the bonnet flange.

Corxosion products and fiber products were found at this point on the bonnet flange. The corrosion products appear white tc light'rey and laky.

2. Diaohraam orocess 0-ring and control air 0-ring are well worn but appear serviceable on disassembly.

3. The diaphragm bottom cavity shows s 1 ig ht ace umulation of what appears to be atmospheric dirt.

4. The valve seat sho~s dirt on the inl'et cavity.

Conclusions.

Althouah the valve shows considerable wear and should be reworked before appears that the valve is being reassembled, still functional. it

2. There is no evidence that any air quality concerns that wou3.d keep this valve from func ioning 3 There is no evidence that the small amount of dust found in the valve would imoair its function. A3.3.

dust inspected was very fine and powdery.

There is no evidence of oil f om the comp essors observed. The only lubricant obsex'ved appeared to 0-ring lubxication. Dirt and oil mix was on y seen at the 0-ring area and attributed too 0-rin -rang lubrication.

5., The on3.y evidence of internal corrosion was seen on the inlet flange at the inlet side passage to bonnet area. This is a stagnant flow area of 'the valve and present on this desian because the b o d y is used fb3.ocked ox'nly or more than one application. The passage of f for this application. and the corrosion is is only on the flanae area.

13-MS"A20 Compressed Gas System Evaluation and Analysis 1.

VALVE AND DAMPER PNEUMATIC COMPONENT INSPECTXON Date. May 2. 1989 f

Unit: 2 Parent component or component tao no: Unknown Component name: Air o'perated Z-way normally open valve Manufacturer.'oss Model oo: 2752A500l.

Manufactured: 2/78 COMMENTS General Condition: The valve appears to have been in service only a short .time or does not see much service. There appears to be little wear on the 0-rings or scraping of the 0-ring on the diaphragm housing.

Exterior condition;

1. No physical d'amage to the housing.

2. Top and bottom flange cap screws are clean wi th no rust.

3 ~ Slight oil and dust buildup on the diaph agm vent.

Process Side; 1 ~ Very clean with virtually no evidence of dust buildup on the valve body, inlet and outlet housing, valve seat assenbly, and return sp ing.

2~ There is no evidence of cor osive effects on this side of the valve.

Control side:

Very clean with virtually no evidence of dust, buildup on the ac uator bonnet or upper diaphragm.

There is no evidence oi corrosive effect" on this side of the valve.

Conclusions.

This v<>>e has probably not been in service for a long Period of tine or valve shows virtually no wear.

it i" not used of ten. The

13-MS-A20 Compressed Gus Sys em Eva'uation and Analysis There is no evidence that any air quality concerns that would keep this valve from func ioning.

There is no evidence that the small quan ity of dust particles found in the valve would impair valve operation ~

There is no evidence of oil from the conpressor- in the valve. The on}y lubricant observed appears to be 0-rang lubrication.

There is no evidence 'that the valve has ever expe ienced internal corrosion.

13-MS-A20 Compressed Gas System Evaluation and Analysis VALVE AHD DAMPER PNEUMATIC COMPONENT INSPECTION Date. May 2, 1989 Uni: 2 Pa en component or component tag no: Unknown Component name: Air operated Z-,way normally open valve Manufacturer. Ross Nedel ee." 2752A5001-Manufactured: 2/78 COMMENTS:

General Condition; The valve apoears to have been in service only a short tine or does not see much service. There aopears to be little wea on the 0"rings or scr"pina oz the 0-ring on the diaphragm housing.

Exterior condition; No mal inservice wear is evident on this valve.

2 ~ Top and botton flange cap screws are clean with no rust.

large amount It oil ox and dust buildup on the A

diaphraam vent. appears that the valve was not cleaned on the outside a~ter rework.

process Side:

1. Very clean with vi tually no evidence o~ dust buildup on the valve body, inlet and outlet housing, valve seat assembly. and return spring. All process side components appear to be bright and shiny.

2. There is no evidence o= corrosive effects on this side o~ the valve.

Control side:

The valve appears to have been opened before as evidenced by a tom bonnet gasket.

2- Very clean with virtually no evidence o~ dust buildup on the actuator bonnet or upper diaphraam.

3. The bottom side oi the diaphragm has O-rona

~O Cl 4b

13-MS-A20 Compressed Gas System Evaluation and Analysis lubr'cant mixed with a slight amount of dust particles.

4 There is no evidence of corrosive effects on the inside o= the valve.

Conclusions.

This valve h as pro =bly not been in service for a long period of time or valve shows virtual'y no wear.

it is not used often. The 2 ~ There is no evidence that any air quality concerns that would keep this valve from functioning.

3. There is no evidence .that the small quantity of dust pa ticles found in the valve would impa' valve operation.

There is no evidence of oil from the corno essors in the valve. The only )ubricani observed appears to be 0-ring lubrication.

5. There is no evidence that the valve has ever experienced corrosion.

13-HS-A20 Com'pressed Gas System Evaluation and Analysis 1

VALVE AND DAMPER PNEUMATIC COMPONENT iNSPECTXON Date: May 2. 1989 Unit: 2 Pa ent component or component tag no: 2SGNPV1001 Component name: Air operated 2'-way normally .open valve Hanuf acturer . Ross Model no. 2752AS001-Manufactured: 2/78 COMMENTS:

Gene al Concition; The val.ve appears to have been in service a very short tine. There appears to be no wear on the 0-rings or scraping of the 0-ring on the diaphragn housing.

Exterior condition; Normal inservice wear is evident on this val.ve.

2. Top and bottom flange cap screws have very slight amounts of rust on then. The cap screws have been lub icated with what, appears to be a graphite based lubricant.

A slight anount of oil and dust buildup is on the diaphragn vent. Xt appears that the valve was not cleaned on the outside after rework.

Process Side:

1 ~ 'Very clean with no evidence of dust builduv on the valve body, inlet and outlet housing, valve seat a>>embly, and return spring. All process aide components appear to have been recentl.y polished.

2 ~ There is no evidence of corrosive effects on this side of the valve.

Control side:

The valv gooears to have been opened bozoz e oy a tom bonnet gasket. Thxs gasket was not replaced.

Verycan with virtually no evidence o= dust buildup on the ac uator bonnet. or upper d'phragm ~

G-8

13-MS-A20.

Compressed Gas System "valuation and Analysxs

3. The bottom side of the diaphragm is .completely clean with no sign of dirt or dust. The diaphragm 0-rings were .replaced but not lubricated.

There is no evidence corrosive ef=ects" on the inside of the valve.

Conclusions .

Thi's valve 'has probably not been in service for a long, period'f time or it is not, used often.

valve shows 'virtual 1'y no wear.

The

2. There is no e:~dence that any air quality concerns that would keep this valve from functioning;

3. There is no evidence o oil from the compressors in the va'lve.

5. Thea'e is nw ,evidence that the valve .has ever experienced co.rosion.

6 "9

0

<gi

13-MS-A20 Compressed Gas System Evaluation and Analysis VALVE AND DAMPER PNEUMATIC COMPONENT ltlSPECT" Ot<

Date: May 3, 1989 Unit: 3 Parent component or component tag no: 3JSGBHV03.78 Component name'. Atmospheric c wp valve pneumatic positioner Manu acturer: Moore (model 746)

Serial No: Not given 4

Time in service.'ince startup COMMENTS:

General condition; The positioner, when conpletely disassembled, showed that its internal pneumatic cavities were very clean. The disassembly was taken beyond the manufacture's recommendations for general mainten"nce. The pilot plungers and se" ts were the dirtiest components in the positioner. This observation agrees with the manufacture's general maintenance instructions.

Exterior condition:

1. Slight oil and dust was observed on the posit'oner.

2. The positioner is missing its exhaust air bug screen.

3~ The air pressure gages used during etartup are on the positioner air ports.

C. The air supply inlet fitting is cross-threaded.

Pilot plunger and seats:

1. The upper and lower pilot Plunger caps. plungqrs.

and plunger springs were renoved. The plunger-,

plunger seats, and springs showed a slight amount dust. The plunger cavity showed a medium amount ox dust.

2. The . 011 1nch or 1 I lees in the p1 lot plunger appeared to be completely free o dust and plugged- Th-is is evidenced by observe>>ions of very round holes with round chamfers on the plungers.

3. The auantity of dust found on the plun ers and plunger seats was not enough to use for a chemical composxtxon or particle sate samp'e.

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3.3"MS-A20 Compressed Gas System Evaluation and Analysis The dust that was observed had the consistency of flour.

5. There was .no evidence u lubricat.ion products or oil-on the plungers, plung-: seats. or springs.

6. After cleaning the plungers and plunger seats no indxcation of corrosion orusting vas observed.

Both components pol'-hed well with a lint free x'ag or cotton swab and a:cohol.

Other positioner internals;

1. The vent path and air supply path were covered with a light amount of reddish brown dust.

2. The vent, cavity and flapper no- le area vere clean and free ox dust, oil, or co xosion.

The no-=le exhaust area of the flapper beam was covered with a fine black radial pattexn of dust.

The output adjustment screw vas found to be, 0 7/8 turns from the bottom which is nox mal.

5. The output. port vas clean.

6. The valve restriction port, was not observed due to d'ff'culty in removing the output diaphragm assembly. The vendor manual cautions that, any undue force or pryina of this assembly must be avoided.

Conclusions.

This positionex is considered to be very clean, considering that with no it has been installed since startup maintenance of the pneumatic conponents.

2- There is no evidence that any air quality concerns would keep this positioner from functioning.

3. There is no evicence of any oil from the compressors or other sources in the positioner.

There is no evidence of any. cor osion on the positxoner.

13-MS-A20 Compressed Gas System Evaluation and Analysis VALVE AND DAMPER PNEUMATIC COMPONENT INSPECTION Date. May 3, 1989 Unit: 3 parent conoonent or conoonenet tag no. 3JSGAHV0184 Component name: Atmospheric dump valve pneumatic positioner Manufacturer: Moore .(model 74G}

Serial No - M101963" 1 Tine in service.. Since startup COMMENTS:

General condition; The positioner showed that it- pilot plungers and seat" were clean. The d'assembly was limited to the pilo" plunges due to difficulty in removing the output diaphragm assembly of 3JSGAHV0178 and observations f om prior inspection of posit'oner 3JSGAHV03.78.. This positioner shoved that the dirties" component was he plunge s and seats. This was verified by the manufacturer's instruction manual.

Exterior condition;

1. Slight oil and dust was observed on the positi'oner.

2. The air pressure gages used during startup are on the positxoner ai ports.

pilot plunger and seats; The uoper nd lower pilot plunger caos, p1ungers.

and plunge>> springs were renoved. The plun ers.

plunge= seats, and springs shoved a slight anount dust. The plunger cavity shoved med um anount of dust.

2. The upper plunger assenbly had slightly nore dust on it than the bottom plunger assembly.

3. The .011 inch orifices in the px'ot olunaers apoeared to, be completely ee of dust and not plugged- This is evidenced by obse vatxons of very round holes with round chamfers on the plungers.

The auantity of dust found on the olungers and plunger seats was not enou h to use for a chemical composition or particle si=e sample.

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13-MS-A20 Compressed, Gas System Evaluation and Analysis 5e The dust that was observed had the consistency of flour.

There was no evidence o= lubrication products or oil on the plungers. plunger seats, or springs.

7. Afte cl ean ng the plunaers and plunger seat" no indlca55.on 0+ corrosion or rusting was observed.

Both components pol.-hed well with a lint free rag or cotton swab and a "cohol .

==

Conclusions:==

This positioner is considered to be very clean considering tt at it has been installed since startup with no maintenance of the pneunatic components.

2. There is no ev i d ence that any air quality concerns would keep this positioner from functioning.

3. There is no evidence of any oil from the conpressors or othe sou ces in the oositioner.

There is no evidence of any corrosion on the posi,tioner.

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33-MS-A20 Compt essed -

Gas Syvs tern Evaluation and Analysis VALVE AND DAMPER PNEUMAT': COMPONENT INSPECTION Date. May 3, 1989 Unit: 3 Parent component or component "tag no. 3JSGAHV0179 Component name: Atmospheric dump valve pneumatic positioner Manufacturer'. Moore (nodel 74G)

Serial No. 14121-7@G7DH Time in service. Since startup COMMENTS:

General condition; The posi(ioner showed that its pilot plungers and sects were clean. The disassembly was limited to the pilot plunges due to difficulty in renoving the output diaphracm assembly of 3JSGAHV0178 and observations from prior inspection of positioner 3JSGAHV0178. This posit'oner shcwed that the dirtiest component was the plungers and seats. This was verified by the manufacturer's instruction manual.

Exterior condition:

1. Slicht oil and dust was observed on the Positioner.

2. The air pressu e gages used during st tup are on the positione air ports.

Pilot pluncer and seats; The upper and lower pilot p3.unger cap-, plungers, and plunger springs wer'e removed. The plungers, plunce seats, and springs showed a slight amount of dust. The plunger c "vity showed a medium amount of dust.

The upper pluncer assemb3.y had sl ichtly no. e dust on it than the bot om plunger assembly.

3..The .011 inch oz ifices in the pxlot Plungers appeared to. be comp3.etc ly cree of dust anc not.

.p3.ucaed. This is evidenced by observant'ons o: var round holes with round cham=era on t.he plungers.

The cuanti y of dust found on the olun er" and plunger seats was not enough to use =or c chem]col composi tion or part j cle si e sampl.e ~

13"HS-A20 Compressed Gas System Evaluation and Analysis

5. The dust th t was observed had the consi- ency oz flour.

There w~@ ne evidence o='ubricstzon p oducts o . oil on the plungers, .plunge:. seats, or sprincs.

'7. After c eaning the plungers and plunger seat" no 1

indicationn of corro I ion or rusting was observed.

Both components pol -hed well with a lint free rag or cotton swab and a:cohol.

==

Conclusions:==

1. This positioner is considered to be ve y clean cons'dering thN it has been installed since startup with no ma'ntenance of the pneumatic conponents.

2. There is no evidence that any air auality concerns would keep this positioner from functioning.

There is no evidence of any oil fz on the comp essors or other sources in the positioner.

4. There is no evidence of any corrosion on the posit'oner.

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13-MS-A20 Compressed Gas System Evaluation and Analysis VALVE AND -DAMPER PNEUMATI" COMPONENT XNSPECTiON Data: May 3, 1989 Unit: 3 Pa ent component o - component "tag no: 3JSGBHV0185 Comnonent name'Atmospheric dump valve pneumatic positioner Manufacturer; Moore .(model 74G)

Serial No: M114618-1 Tine in se vice: Replaced on 11/25/87 COMMENTS:

General condition; The positioner showed. that its pilot plungers and seats were clean. The disassembly was limited to the pilot plunges due to difficulty in removing the output diaph agm assembly o~ 3JSGAHV0178 and observations from prior inspection of positione 3JSGAHV0178. This positioner showed that the dirt'est conponent was the plungers and seazs. This was veri~ied by- the manufaciu er's instruc" 'on manual.

Exterior cond'" ion:

1. Slight oi.l and dust was observed on the posxtioner.

2. The air pressure g-ges used duri'ng startup are on the positione air po ts.

pilot plunge and seats:

1. The upper and lower pilot - plunger caps plungers, a

and plunger springs were removed. The plunger plunger seats. and springs showed a slight anount

~

dust. The plunger cavity showed a medium amount of dust.

2. The upper plunger assembly had slightly no e dust on it than the botton plunger assembly.

3. The .011 "'nch orifices in the pilot Plun=ezs appea ed to be completely ree of dust and not plugged. This js ev denced by obse vatzons nf vez y round holes wi"h round chan ers on the oluncers.

The cuantity of dust found on the plunger- and plunger seats was not enough to use for a chem>col composition o: particle si e sample.

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13-MS-A20 Compressed Gas System Ev..'.:~tion and Analvsis 1..

5. The dus" f lour.

that was observed had the consisteency o f

/

6. There was no evidence of lubr'cation pro uc iss roduc" ox'i 1 on thee plungers, plunger seats, or springs.

7. After cleaning thhe plungers and plun er seat" no indication of cor osion or rusting was observed.

Both components polished well with a lint free ram or cotton swab and alcohol.-

Conclusions.

1. This positioner is considered t o b e very clean considering that years with no itmaintenance has been installed for two of the pneumatic components.

2. There is no evidence that any ai auality concerns

~ould keep this positioner fron functioning.

3. There is no evidence of any oil from the compressors or other sources in the posi'tioner.

Ther e is no evidence of any corrosion on the

, positioner.

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13-HS-A20 CO.'fPRESSED GAS SYSTEH EVALUATION A'ND ANALYSIS APPENDIX H.

LOW PRESSURE NITROGEN SYSTEM TEST RESULTS

13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS Smmmmrv This Appendix provides a summary of the tests which were run to determine the cause for the pressure drop in the backup nitrogen system to the compressed gas system, test results, conclusion, and proposed corrective actions. For the temporary test setup, refer to the Nuclear Administrative Technical Manual procedure noted under each test section.

TEST 1 Procedure No.: 73TI-9IA02, Rev; 0 05/14/89 The low pressure nitrogen (GA) backup supply to instrument air (IA) header

,test was set up to determi.,e actual conditions which the nitrogen system would experience during a loss of instrument air. T-Mod 2-89-IA-018 was installed to support 'this gathering of data as per the test 'instruction.

The scope of the test.was to throttle temporary valve TV-3 to establish flow rates of 300, '400, 500, 700, and 900 standard cubic feet per minute.

Pressures were recorded both at'he nitrogen skid (at the low pressure nitrogen head'er PI-78 and at the high pressure nitrogen header PI-79) and at the temporary modification manifold TPI-1 at two minute time intervals for each established flow rate. The nitrogen level was also recorded as was particulate samples.

The test results indicated that the nitrogen header just downstream of the regulators immediately dropped off to 90 psig with flow of 300 SCFM and with subsequent higher flow rates (the highest attainable consistent flow rate was 737-740 SCFM) the pressure dropped to 82-86 PSIG. The pressure in the turbine building at TPI-1 dropped off rapidly with the higher flow rates. Figure 1 shows the pressure at the instrument air header interface at various flow

'ates.

These results indicated two initial problems:

1) The regulators weren't providing the proper flow to establish the 82-86 PSIG out at the low press nitrogen header.

2) There was a considerable pressure drop being caused in the piping from the regulators to the temporary gage in the turbine building.

From the results above, engineering decided to rerun the test and additionally record the nitrogen pressure upstream of the low,pressure nitrogen regulators at the PI-42. This would indicate if there was a system design problem (i.e.,

Item 1, the vaporizer and/or piping couldn't supply the proper quantity of nitrogen at the desired pressure with the regulators wide open} or that regulators were either sized wrong and/or set incorrectly. For Item 2, and NED engineers evaluated the piping configuration from the regulators to T-Mod setup and determined that the check valve 2IAN-V056 contained a spring which could be the cause for the high pressure drop experienced during testing. The results from the particulate samples indicated more particles greater than the 3 micron level than we would like to see in the instrument air system.

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13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS TEST 2 Procedure Ro.: 73TI-9IA02, Rev. 0 05/17/89 The low pressure nitrogen (GA) backup supply to instrument air (IA) header test was set up to observe the performance of the nitrogen system with the spring from check valve 2IAN-V056 removed. T-Mod 2-89-IA-018 remained installed to support this gathering of data as per the test instruction. The internal spring was removed from check valve 2IAN-U056 per EER 89-IA-007 and T-Mod 2-89-IA-023.

The actual test was to throttle temporary valve TV-3 to establish flow rates of 300, 400, 500, 700, and QOO standard cubic 'feet per minute. Pressures were recorded both at the nitrogen skid (at the low pressure nitrogen header PI-78 and PI-42 and at the high pressure nitrogen header PI-79) and at the temporar emporary modification manifold TPI-1 at two minute time intervals for each established flow rate. The nitrogen level was also recorded as was particulate samples.

The test results indicated that the nitrogen header just downstream of the regulators immediately dropped off to 94 psig with flow of 300 SCFM and with subsequent higher flow rates (the highest attainable consistent flow rate was 811-818 SCFM) the pressure dropped to 82-90 psig. The pressure in the turbine building at TPI-1 dropped off rapidly with the higher flow rates but .not as rapidly as test 1 with the spring installed in the check valve .(a 2-6 psxg psi increase occurred as a result of the spring removed). The pressure upstream of the pressure regulators PCV-49 and PCV-49A consistently was higher than the downstream pressure by 54-60 PSIG. This seemed to indicated that the low pressure nitrogen vaporizer and piping supplying the regulators PCV-49 and PCU-49A was doing its design function. This drew the conclusion that the regulators were the cause of the immediate pressure drop (under flowin owing conditions) observed at PI-78. Whether the regulators were either not sized correctly, not set properly, or faulty could not be determined, therefore, EED and NED engineers decided to rerun the test.

The results from the particulate samples still indicated more particles greater than the 3 micron level than we would like to see in the instrument air system. Figure 1 shows the pressure at the instrument air header at various flow rates.

TEST 3 Procedure No..: 73TI-9IA02, Rev. 1 05/19/89 This re'vision of the low pressure nitrogen (GA) backup supply to instrument air (IA) header test specifically tests the operability of the pressure control valves (PCV49, PCV49A and PV41) which supply the low pressure nitrogen header, allows the setting of these same valves, and tests the system under the same flow rates established during the previous tests (73TI-9IA02, Rev. 0).

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13-MS-A20 COMPRESSED GAS SYSTEM 'EVALUATION AND ANALYSIS The test allowed isolation- of the three pressure regulators in various sequences and allowed for the throttling of the bypass valve around the regulators PCV49 and PCV49A. 'he results indicated that a flow at over 1000 SCFM could be obtained from the low pressure N2 system with the high pressure.

nitrogen backup not supplying any nitrogen. Additionally, the pressure at TPI-1 was 78 PSIG with a flow of 953 SCFM. This extremely high flow was likewise obtained with the high pressure, nitrogen regulator PV41 not supplying any nitrogen. Figure 2 shows the nitrogen system capacity and pressure at the interface with the instrument air system with the bypass valve throttled to maintain a pressure of 115 psig downstream of the regulator.

After obtaining this initial data, each regulator was isolated and cal'ibrated in accordance with the table below at a flow of approximately 200 SCFM.

l ) AS FOUND ) AS LEFT I RFGULATOR SETTING SETTING I I . I 2JGAiN-PCV49 98 PSIG 113 PSIG I I I 2JGAN-PCV49A 88 PSIG ) 105 PSIG I I I 2JGAN-PV41 85 PSIG I 100 PSIG I The original test at the various flow rates of 300, 400, 500, 700, and 900 SCFM was afterwards accomplished. The test results indicated that the nitrogen header just downstream of the regulators dropped off to 108 PSIG with a flow of 289 SCFM and with subsequent higher flow rates the pressure dropped off to 100 PSIG. Figure 2 shows the nitrogen system capacity and pressure at the instrument air header interface after the regulator adjustment. The upstream pressure of regulators PCV49 and PCV49A remained at 150-160 PSIG.

This indicates that the regulators, even though set under dynamic (flowing) conditions, still drifted down at the high flow rates from their original settings. The pressure at TPI-1 still dropped 16 PSIG at 700 SCFM and dropped 29 psig at 902 SCFM.

After the flow testing, samples were taken of the nitrogen stream and the particulate readings indicated that the quantity of particulates had decreased.

significantly from the previously two tests. There were only 3-5 particles greater than or equal to 5 microns but less than 10 microns . and 105-158 particles greater than or equal to 3 microns but less than 5 microns. The original high number of particles in the low pressure nitrogen system is attributed to the lack -of full flow purging the system during the startup phase.

Conclusions In conclusion, the three tests that were performed on the low pressure nitrogen system indicated . that the nitrogen skid upstream of the pressure regulators GAN-PCV-049, 049A and GA-PC-041 can satisfactorily deliver the anticipated flow of 1000 SCFM at 100 PSIG downstream of the regulator.

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13-MS-A20 COMPRESSED GAS SYSTEM EVALUATION AND ANALYSIS However, the regulators and the components downstream of the regulators are not functioning correctly to deliver the maximum desired flow and pressure to meet the IA header demand without operator action.

Pressure regulator J-GATV-PCV'-49 currently has an outstanding work order (V.O.

) hich requires removal, inspection, repair and/or replacement of the valve as necessary to ensure that the valve maintains pressure downstream at 115 PSIG + 3 PSIG. The subject valve was adjusted per 73-9IA02, Rev. 1, satisfactorily at flow condition such that the pressure dovnstream is currently within the required range. The system was then tested to ensure proper operation. Therefore, it is not necessary to perform M.O. 00334794 as a restart item. -In addition, the subject valves are currently being evaluat e d or replacement with more efficient type regulators as outlined i belov.e ow.

After evaluating all the test data, the folloving are recommended for resolution of the lov obtained pressures:

For Short Term/Irrmediate Resolution In order to maintain system pressure of 85 PSIG at flov rates in excess of 700 SCFM (during a transient situation) an operator needs to be dispatched to the ow pressure control panel and to manually throttle bypass valve GAN-V260 to maintain a pressure of 100-120 PSIG at PI-78. Important attention must be made to the fact of not exceeding the high pressure setpoint of 125 PSIG so as to provide a safety margin between line operating pressure and the setting on the pressure safety valve (140 PSIG) and rupture disk (165 PSIG).

For Lone Term Total Resolution

1) Evaluate setting the regulators (PCV-49, PCV-49A, and PV-41) to a higher setpoint, which will give us a subsequently higher pressure at the high flow rates which had previously dropped off,

2) Evaluate procurement and installation of'egulators which are guaranteed not to drift drastically under various flowrates, and

3) Evaluate installing a spring with a small compression ratio., in accordance with the manufacturers recommendations, in place of the removed spring from check valve IAN-V056 (EER-89-GA-007), and

4) Additionally, evaluate component by component the design pressure drop (at our desired flow/pressure conditions) of all valves and piping from the nitrogen regulators to the interface where nitrogen backs up instrument air and change out any component for which an enhancement is, possible.

5) Install a filter in the nitrogen line just upstream of the nitrogen/

instrument air interface to filter out particles greater than 3 microns.

S i te Mod 2 - SM-GA-003 has been developed to ins tall this fi 1 ter . This should be installed during an available outage, but this need not be a restart item as there is no specific safety consequences with the present setup. The modification will enhance the present setup and comply with the intent of Generic Letter 88-14 as it is ANPP's position of complying in a timely manner with all the recommendations of the NRC.

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PRESSURf~I 8 FLOK 13-HS-A20 Nitrogen system test per 73TX-9IA02 Rev. o P 'g e 1 I/5 5 fj lUR Figure 1 6/to/m 105

$ 00 95 p 90 I 0 e 85 s W..

s 80 0

Test no. 2 with the spring removed from check valve I'5 U

Qi 70 Test no. 1.

P.

s 65 I

g GC 55 0y.

50 0 45 40 300 350 400 450 500 550 600 650 700 750 800 850 f l a w i f r

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PRESSURE 3 FLOW 13-HS-A20 110 Nitrogen Test Per Procedure 73TI-9IA02, Rev. 1 Page llG 108 Figure 2 106 104 0--

$ 02

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$ 00 98 Test curve with the regulator bypass 96 throttled to maintain 115 psig downstream P

I 94 of the regulator e 92 S 90 S

88 U

I' 86 Test curve with the regulators '

84 adjusted to required set points and with the bypass clohed 82 80 p

S 78 Qi

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I 76 74 72 70 68 64 300 350 400 450 500 550 600 650 700 750 800, 850 900 950 1000 $ 050 f $ o iv.

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