ML17158A653
| ML17158A653 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 04/26/1995 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17158A652 | List: |
| References | |
| GL-89-04, GL-89-4, NUDOCS 9505040118 | |
| Download: ML17158A653 (17) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 S
F TY EVA UAT N BY THE OFFICE OF NUCLEAR REACTOR REGULATION T
TO TH SERVIC T STING PROGRAM RELIEF RE UESTS FOR U
PS AND VA S
FOR SECON 10-YEAR INTERVA PENNS VANIA OW R
8E L GHT COMPANY S
S U
HAN ST A CTRIC STATION UNITS 1
AND 2 DOC NOS. 50-387 AND 50-388 1.1
~INI NN N
The Code of Federal Regulations, 10 CFR 50.55a, requires that inservice testing (IST) of certain ASME Code Class 1, 2, and 3 pumps and valves be performed in accordance with Section XI of the ASME Boiler and Pressure Vessel Code (the Code) and applicable
- addenda, except where alternatives have been authorized or relief has been requested by the licensee and granted by the Commission pursuant to Sections (a)(3)(i), (a)(3)(ii), or (f)(6)(i) of 10 CFR 50.55a.
In proposing alternatives or requesting relief, the licensee must demonstrate that:
(1) the proposed alternatives provide an acceptable level of quality and safety; (2) compliance would result in hardship or unusual difficultywithout a compensating increase in the level of quality and safety; or (3) conformance is impractical for its facility.
NRC guidance contained in Generic Letter (GL) 89-04, "Guidance on Developing Acceptable Inservice Testing Programs,"
provides alternatives to the Code requirements determined acceptable to the staff.
Alternatives that conform with the guidance in GL 89-04 may be implemented without additional NRC approval.
Relief requests that conform with GL 89-04 are not evaluated in the Technical Evaluation Report (TER), though they have been reviewed to determine conformance and any concerns identified by such reviews are discussed in Section 5,
"IST Program Recommended Action Items."
Section 50.55a authorizes the Commission to approve alternatives and to grant relief from ASME Code requirements upon making the necessary findings.
The NRC staff's findings with respect to authorizing alternatives and granting or not granting the relief requested as part of the licensee's IST program are contained in this Safety Evaluation (SE).
The IST program evaluated in this SE relates to the second 10-year IST interval for the Susquehanna Steam Electric Station, Units 1 and 2.
The interval began June 1,
1994.
The second 10-year interval IST program is based on the requirements of the 1989 Edition of the Code in accordance with 10 CFR 50.55a.
9505040ii8 950426 PDR ADOCK 05000387 I
PDRl I
The Hechanical Engineering Branch, with technical assistance from Brookhaven National Laboratory (BNL), has reviewed the information concerning IST program requests for relief submitted for the updated IST program for the Susquehanna Steam Electric Station, Units 1 and 2, in Pennsylvania Power 8 Light Company's letters dated June 30,
- 1994, and December 29, 1994.
The staff adopts the evaluations and recommendations for granting relief or authorizing alternatives contained in the attached TER prepared by BNL (Attachment 2).
Relief is granted from, or alternatives are authorized to, the testing requirements which have been determined to be impractical to perform, where compliance would result in a hardship without a compensating increase in safety, or where the proposed alternative testing provides an acceptable level of quality and safety.
In addition, certain relief requests have been denied.
A summary of the relief requests and NRC actions is provided in SE Table 1
(Attachment 1).
The revisions to the IST program which were submitted in the December 29, 1994, letter did not include any new or revised relief requests;
- however, one additional test deferral (Refueling Outage Justification ROJ-21) was included.
ROJ-21 is not listed in Table 4.2 of the TER, which summarizes refueling outage justifications.
The justification for deferring testing from once every 92 days during power operations to shutdown conditions appears adequate;
- however, the justification does not discuss why the testing is impractical for scheduling during cold shutdown outages.
If the licensee determines that it is impractical to exercise the valves during cold shutdowns, ROJ-21 should be revised to include such justification.
The NRC has identified a number of generic deficiencies that affect plant safety and that have frequently appeared as IST programmatic weaknesses.
These were addressed by GL 89-04.
In that GL, the staff delineated positions that describe deficiencies and explained alternatives to the ASNE Code that the staff considers acceptable.
If alternatives are implemented in accordance with the relevant position in the GL, the staff has determined that relief should be granted pursuant to 10 CFR 50.55a(g)(6)(i)
[now (f)(6)(i)] on the grounds that it is authorized by law, will not endanger life or property or the common defense and security, and is otherwise in the public interest.
In making this determination, the staff has considered the burden on the licensee that would result if the requirements were imposed.
For any relief granted pursuant to GL 89-04 the staff (with technical assistance from BNL) has reviewed the information submitted by the licensee to determine whether the proposed alternative follows the relevant position in the GL. If an alternative conforms to a position of the GL, it is listed as having been approved pursuant to GL 89-04 in the attached Table 1.
Any action items in the relief request are addressed in the TER.
TER Tables 4. 1 and 4.2 are summaries of the test deferrals for valves that cannot be full-stroke exercised during power operations o} cold shutdown conditions.
Based on a test conducted at Susquehanna Unit 1 on March 24, 1995, it appears that testing of certain excess flow check valves at power is practical.
The 1989 Edition of the ASME Section XI Boiler and Pressure Vessel Code (i.e.,
OM-10) allows for the deferral of full-stroke exercise testing to cold shutdowns or refueling outages only where such testing is not practical during power operations (and cold shutdowns, if applicable).
If the licensee wants to defer the testing beyond quarterly and propose an alternative frequency (e.g., to cold shutdowns or refueling outages),
when full-stroke testing of an excess flow check valve is practical, the licensee must submit a
request to the NRC proposing an alternative test frequency (e.g.,
5 50.55a (a)(3)(ii) compliance with the Code requirement would impose a hardship or unusual difficultywithout a compensating increase in the level of quality and safety).
The NRC recommends refueling outage deferral justification number 20 (ROJ-20) be revised to clarify the impracticality of performing the quarterly full-stroke test for the valves listed and recommends that PPKL submit a
request for an alternative frequency if appropriate.
Any revisions or requests necessary to correct ROJ-20 should be submitted within 90-days of the date of this SE or by the end of the current refueling outage, whichever is later.
A sampling of systems was selected for a review of the scope of the IST program.
Items that may require action by the licensee are discussed. in Section 5.1.
The evaluation does not confirm that all components subject to IST and all test requirements are included in the program;
- however, such issues are subject to NRC inspection.
The licensee should refer to the TER, Section 5, for a discussion of recommendations identified during the review and address each recommendation in accordance with the guidance therein.
The IST program relief requests are acceptable for implementation provided the action items identified in Section 5 of the TER are addressed within one year of the date of this SE or by the end of the next refueling outage, whichever is later.
The licensee should respond to the NRC within one year of the date of this SE describing actions taken, actions in progress, or actions to be taken, to address each of these items.
For those relief requests that have been denied, testing should conform with code requirements within 90 days from the date of the safety evaluation.
The staff concludes that the relief requests as evaluated and modified by this SE will provide reasonable assur ance of the operational readiness of the pumps and valves to perform their safety-related functions.
With respect to Relief Request No.
10, the staff has determined that relief may be granted pursuant to 10 CFR'50.55a(a)(3)(i),
in that the proposed alternatives provide an acceptable level of quality and safety.
In addition, with respect to the other requests for which relief is gr anted herein, the staff has determined that granting relief pursuant to 10 CFR 50.55a (f)(6)(i) is authorized by
law and will not endanger life or property, or the common defense and security and is otherwise in the public interest.
In making this determination, the staff has considered the impracticality of performing the required testing and the burden on the licensee if the requirements were imposed.
Principal Contributor:
P. Campbell Attachments:
1.
Table 1
2.
Technical Evaluation Report
r >f>';
Susquehanna Unit Nos 1 & 2 SE Table 1 Summary of Pump and Valve Relief Requests
- ,',. Relief:::;:::-:-'.
",",-',Request:- ';, ER::::j"':~
- .::;;::i':-;"P;::,:"',"'.:::OMa-1988::;Part':6.;:::,.:.;:-:,"'...:;;".:.;.':.'-';~.:.-,.;:;-.:,"~.;::;,';Re'quirement;.';:",;.,:,':;
':::::,.,':,.:"::!:.-'::::;::Equipment :';.;:;..;j:.::."'::::,::::."
'-'"'.Identification"-:"-":::
""';:;:,'ProposedIAlteinate',:-'::-,,:":,:.",;"',"::.:,;-',",.";::'.,:':NRC, Action':::::,",.'":;::,:"
03 (Uiut 1) 11 (Unit 2) 12 (Units 1&2) 15 (Unit 1) 2.1 2.2 2.3
$ 5.2, Pump flow rate, differential pressure, and vibration be measured during quarterly pump tests.
f 5.6, Two minute duration of pump test, with test run at conditions as stable as system permits.
f 5.2, Pump flow rate, differential pressure, and vibration be measured during quarterly pump tests.
5 5.2, System resistance varied until measured differential pressure or flow rate equals reference value.
Diesel Fuel Oil Transfer Pumps OP514 A thru E.
HPCI Pumps 1(2)P204 and 1(2)P209.
HPCI Auxiliary Oil Pumps 1(2)P213.
~Emergency Condenser Water Circulating Pumps OP171A, B.
~Chilled Water Loop Circulating Pumps OP162A, B.
Perform monthly pump operational test as per TS 4.8.1.1.2.
Run pumps at least 1
minute under conditions as stable as system permits.
Quarterly pump test measuring discharge pressure and vibration.
Monitor chilled water loop chiller discharge temperature. Monitor differential pressure, flow rate, and vibration amplitude.
Interim relief granted pursuant to
$50.55a(f)(6)(i).
Relief denied.
Non-Code Class pumps.
No action required.
~Interim relief granted pursuant to
$50.55a(f)(6)(i).
~Non-Code Class pumps.
No action Iequlfed.
Attachnent1
SE Table (Cont'd)
,"'.'Relief
':,Requ'est.::-;..
""":TER ~"
"',Sectioi"',i
'-.:',:::.:.",I',-:-:;:".':",':-'::-:Equip
- .NRC,
- ,'hctio'r't","';
01 (Unit 1) 02 (Unit 1) 04 (Units 1&2) 05 (Units 1&2) 5.5 5.6 3.1 N/A; Valve internals integrity verification of NRC I&EBulletin 83W3.
$ 4.2.1.1, Test frequency f 4.2.1.1, Test frequency
$ 4.2.1.1 and 4.3.2.1, Test frequency
$ 4.2.1.4, Stroke timing ESW check valves 011001, 011002, 011003, 011004 ESW check valves 011033, 011034, 011035, 011036, 011037, 011038, 01 1039, 011040, 011513, 011514 MSIV Leakage Control System check valves 139F010 (239F010),
139F011 (239F011)
ADS Code safety/relief valves PSV-141F013G, J, K, L, M and N (PSV-241F013G, J, K, L, M and N)
Exercise quarterly and sample disassembly/inspection of one valve per 18 months, or perform full-stroke exercising with nonintrusive techniques of one valve per 18 months.
Sample disassembly/inspection of two valves per 18 months, or perform full-stroke exercising with nonintrusive techniques of two valves per 18 months.
Periodic inspection of each valve once every 72 months to verify stroke-open and closure.
Valve exercising once every 18 months without stroke timing, per TS 4.5.1.d.2.b.
Stroke opening time and stroke opening distance measured at 5 year intervals during setpoint testing per OM-1987, Part 1, $
1.3.3.
Relief not required.
Authorized per Generic Letter 8944, Position 2, with provisions.
Authorized per Generic Letter 894)4, Position 2, with provisions.
Relief granted pursuant to F50.55a(f)(6)(i),
with provisions.
SE Table (Cont'd)
- ",,
- Relief,.':-;:;
- "Req'uest
- 'TER'",.""'.
-'ectIon':,':.
- F::"':-.:'~':,"::."'.:FOMa,1988,,'Part;:10;;,;;.':.,':;:-:::':'-:::-:'.
i'."."::-"<",'-','~'Equipineiit::.';."j!:,';:.-:.'.';,,".:.i c
'j::.'.",::",":;","':;:"Metho'dof7e'stin j:;:"',:,":;";:,','"::;:::;,'Y'::".':.,'6 (Units 1&2) f 4.2.1.1 and 4.3.2.1, Test frequency f 4.2.1.4, Stroke timing Control Rod Drive (CRD):
~Scram discharge header check valves 147114-001 thru -185 (247114401 thru -185),
Scram inlet valves XV-1471264)01 thru -185 (XV-247126-001 thru -185)
Scram exhaust valves XV-147127401 thru -185 (XV-247127401 thru -185)
~Proper functioning of scram discharge header check valves, scram inlet valves and scram exhaust valves verified by periodic scram testing and control rod insertion timing per TS 4.1.3.2 and 4.1.3.3.
~Authorized per Generic Letter 89M, Position 7.
~Charging water header discharge check valves 147115401 thru 185 (247115401 thru 185)
~Proper closure of charging water header check valves verified by verifying each associated accumulator maintains set pressure above alarm set point for > 10 mins., with no CRD pump operating, once per 18 months per TS 4.1.3.5.b.2.
~Authorized per Generic Letter 89~, Position 7.
~Cooling water header check valves 147138401 thru 147138-185 (247138-001 thru 247138-185)
~Proper closure of cooling water header check valves verified by venting ofcooling water header during PCILRT, at least once per 30 to 50 month interval per TS 4.6.1.2.
~Authorized per Generic Letter 89~, Position 7.
SE Table (Cont'd)
- Relief',;
- Request;.
,:;-.'-'No'."",'-'"'TER'::
.:.;Sectioii
"<<-""":""-'"-OMa'-'1988Part":10"-"" "'":
."-.:--'.;.,;;;:,.';;Identtficatton:::."'::.:,,',':,'"',!-,'.':::;;::,:.',,:.".',I."'::.:Method'..of:.Testtn
- ';-".
- :NRC:
hctio'n,;"'-'-'7 (Units 1&2) 08 (Units 182) 09 (Units IA2) 3.2 5.6 5.5
'f 4.2.1.9.b, Immediate corrective action for valves not meeting stroke time of $4.2.1.8.
f 4.3.2.1, Test frequency and
$ 4.3.2.4(c) Alternative of disassembly and inspection at refuelings.
f 4.3.2.1, Full-stroke exercising and test frequency.
CRD hydraulic valves XV-147F010 (XV-247F010), XV-147FOll (XV-247-F011),
XV-147F180 (XV-247F180),
XV-147F181 (XV-227F181)
Core Spray check valves 152005 (252005)
Fuel Pool Cooling and Clean-Up check valves 153071 A, B (253071 A, B)
Each valve exercised quarterly.
Closure stroke time for each valve compared to TS 4.1.3.4.a.l limitof 30 secs.
Corrective Action in accordance with OMa-1988, Part 10, $4.2.1.9. b will not be taken.
Periodic inspection every 6 years to verify closure.
Part-stroke by pneumatic open flow path test every 3 years during Section XI, IWD-2400 pressure test.
Relief denied.
Authorized per Generic Letter 8944, Position 2, with provisions.
Authorized per Generic'Letter 8944, Position 2, with provisions.
10 (Units 142) 3.3
$ 4.2.1.4, Stroke timing.
Skid-mounted HPCI turbine stop valve (FV-15612 (FV-25612)
Disassembly/inspection once every 6 years per Relief Request 20.
Exercise open and closed during quarterly HPCI pump testing.
No stroke time trending willbe performed.
Relief authorized pursuant to
)50.55a(a)(3)(i).
SE Table (Cont'd)
";.;.'%lief;
- Re'quest' c'No'.,",
',: s:i'TER'"".
;:;Se'ctiori::.':-;':::-."'.;-.'"':;,':;OMa-,1988.;Part::;:10:;.".-,':::.;:::..',:;,-.':;.'.-.,
':':::.';.:-',".'i:.,:::;:,'j';-:,,.Eqiitpmeiit':::;:..=.,!.'.,(::::-',::::.:i:.':,:;::
',"';,;;;.'--:Ideritificatiiri,-":::;.:~
.:,::."';:;::::.;.,',.);-""";::;;."::.,--':Method,::ofTestliig:',':.",,":-":-."i!
- ,'".'.'.NRC,'."Actioii";'.:.".
13 (Unit 1) 3.4
$ 4.2.1.1, Full-stroke exercising and test frequency.
f 4.2.1.4, Stroke timing.
Control Structure Chilled Water temperature control valves:
~ASME Code Class 3 TV48612A TV48612B Monitor chilled water loop chiller discharge temperature and part-stroke exercise valves quarterly.
Full-stroke exercising once per 18 months.
~Relief denied.
~Non-Code Safet Function TV48643A TV48643B TV48652A TV48652B TV48662A TV48662B No stroke timing measurements.
~Non-Code Class valves.
No action required.
14 (Unit 1)
$ 4.2.1 Exercising test.
$ 4.2.1.4, Stroke timing.
Control Structure HVAC Chilled Water control valves:
SV48621A SV48621B Monitor chilled water loop chiller discharge temperature.
No stroke timing measurements.
Non-Code Class valves.
No action required.
16 (Units IBc2) 5.5
$ 4.3.2, Exercising open test RCIC/HPCI pump suction line backflow prevention to suppression pool RCIC:
149F030 (249F030)
HPCI:
155F045 (255F045)
Check valve sample disassembly/inspection at refuelings per Relief Request 20.
Authorized per Generic Letter 8944, Position 2, with provisions.
SE Table (Cont'd)
.." Relief:,::;:.
Reque'st',.
- ".-"'"'.No'.'",':;-'"",.
- .
- ,.":;.TER'.:",
',:"j':::;:".:..'.;:! ':.'OMa-'1988:;Part'10'"::,"":,',";;;.
17 (Units 1&2) 18 (Units 1&2) 5.5 5.5 f 4.3.2, Exercising closed test 5 4.3.2, Exercising closed test RCIC/HPCI pump suction line backflow prevention to Condensate Storage Tank RCIC:
149F011 (249F011)
HPCI:
155F019 (255F019)
RCIC/HPCI pump suction line backflow prevention to Keepfill Line RCIC:
149F016 (249F016)
HPCI:
155F013 (255F013)
Check valve sample disassembly/inspection each valve at every other refueling to verify closure capability.
Check valve sample disassembly/inspection at every other refueling.
Authorized per Generic Letter 89M, Position 2, with provisions.
Authorized per Generic Letter 89M, Position 2, with provisions.
SE. Table (Cont'd)
'-.'".-Rel~tef -';;::,
'.Request,'
:TER-"i'-',"':.
",:,:Section",';::':;;;;:;.;:;'"'.;,'".,:'":,:!,OMa-',1988;.Pa'r't';:::10:.,:;"",.;:::.
i'::-"::;-:;-"4%:Requirement:.":;.:,'::",::::"::,.;.-,:.'::.'.."-"':::::-'"; ':::!Identific'atioii"'-""'::-'"'-"'.
'(
";.'.,:.:;;-:;," ':,Prop'ose'd
'Alteriiate'.::::,::,:,".:,':,"':::,:,,:::::":NRC,::,Adioii',::
- .".;-"!':,'.'";.-'",:'.Method.':of,':Te'stin'g.:::,:";:.=:.".-.'"".
-::";::,.".:;::-':::.".';ll;",::-;
'i.""'.;-.'.:,:."'-,:::.;,;",'.;..:~."'9 (Units 1&2) 5.5 f 4.3,2.4(c) Alternative check valve disassembly/inspection at every refueling.
Check Valves: (Unit 1)
EDG ESW cooling OG501A 011033 011034 OG501C 011035 011036 OG501B 011037 011038 OG5010 011039 011040 OG501E 011513 011514 RCIC - turbine exhaust steam line vacuum breaker 149F063 149F064 RHR pump minimum low line 151 F046A/B/C/D LPCS CS pump minimum flow line 152F036A/B/C/D HPCI - turbine exhaust steam line vacuum breaker 155F076 155F077 Check valve sample disassembly/inspection or full-stroke exercising with nonintrusive diagnostic inspection at refuelings.
Authorized per Generic Letter 89M, Position 2, with provisions.
SE Table (Cont'd)
- ==: Relief::::::.::
';:.;Request,:,
..-';;:No'.,".':.,,-".,i;
,TER
",SectIo'n',".",',
<NFL'-".,;'OMa-'.1988,:Part.'-:.10,:;.'-'=-'-".-'.-,":.':-'."..
-;:":;::-"::j'.-.",.""Equipment-'::::.':'.-@:;:~'."-",,",
- -";:":::::::."~~;,"-'5'Requiremeiit':;.':.,".::.'".:>>:
Check Valves: (Unit 2)
ESG 4 Load Center rooms cooling 211132 21133 21134 21135 RCIC - turbine exhaust steam line vacuum breaker 249F063 249F064 RHR pump minimum fiow line 251 F046A/B/C/D LPCS CS pump minimum fiow line 252F036A/B/C/D HPCI - turbine exhaust steam line vacuum breaker 255F076 255F077
'c
- -;:;:,';;-".Metho'd:,';of: TestIng:':.::;.:.
'.'"=,,";NRC,.:A'ction".:.."":';,-'
SE Table (Cont'd)
'; Relief;:":.:":
- Request';,':
.'.,:::No'.";::.,':
".';'::TER';::;.;: "i4':":;'"':-::'::OMa-.:1988::Part;:.10'.:.'-'."."':::;::
","',,':,:,:::,',:,:"-,:.',.- i:Equipment.,'""ll:::-.'::::j,:-l':,g'.';:q';::::":Proposed,'Alternate:..'i.'-'::::,":,:,':,"'"'.':,:,":..
- .,""',
- ,',:;;::.::Identtficationi':,'".":~':.','.';.",::,."':":.:,:.'. -.".,.':.:,"".:,",'-'Method:
21 (Units IA2) 3.5 f 4.2.1.8, Stroke time acceptance criteria
'j 4.2.1.9(b), Declaration of valve inoperability ESW system isolation ESW/SWM HV-10943A2/B2 (HV-20943A2/B2)
HV-11024A1/A2/A3/A4 (HV-11024A1/A2/A3/A4)
HV-11143A/B (HV-21143A/B)
Containment isolation CAC HV-15703 (HV-25703),
HV-15704 (HV-25704),
HV-15705 (HV-25705),
HV-15711 (HV-25711),
HV-15713 (HV-25713),
HV-15714 (HV-25714),
HV-15721 (HV-25721),
HV-15722 (HV-25722),
HV-15723 (HV-25723),
HV-15724 (HV-25724),
HV-15725 (HV-25725)
Valves not meeting stroke time reference value acceptance criteria ranges ($4.2.1.8), that are immediately retested per OMa-1988 Part 10 '$4.2.1.9(b) with second set of stroke time measurement data also not meeting acceptance criteria ranges, shall have said data analyzed within 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> to verify that new stroke time data represents acceptable valve operation; or valve test frequency shall be increased to once each month until corrective action has been taken, at which time original test frequency shall be resumed.
Relief denied.
SE Table (Cont'd)
- 'elief': '.:.'-"::::.,TER";
-Request',;:,'!Section",;",
"';-"""<".":,,.OMa-'.1988;.Par't:::.'10':,':,,'::;::::,:.';,:, ';":;
21 (Cont'd)
LRW HV-16108A1/A2 (HV-26108A1/A2)
HV-16116AI/A2(HV-26116A1/A2)
RBCW HV-18781A1/A2/Bl/
B2 (HV-28781A1/A2/Bl/B2),
HV-18782A1/A2/Bl/
B2 (HV-28782A1/A2/Bl/B2),
HV-18791AI/A2/BVB2(HV-28791A1/A2/Bl/B2),
HV-18792A1/A2/Bl/B2 (HV-28792A1/A2/Bl/B2)
SE Table (Cont'd)
- ".""Relief.
- .
Reqiiest::!
."= -';:.'::"'.':::p":."OMa-;.,.1988,;:Par't':,10.,";:'i.'-':.-"
-,".!.'"'-':-':-""-"Identificatiori'~'"-""-""":::-.'.":-;Method:."of,;TestIiig';',-':,::.";'.,
22 (Unit 2) 3.6
$ 4.2.1.1 Full-stroke exercising test frequency
$ 4.2.1.4 Stroke timing Emergency switchgear (ESG) room cooling pressure control valves HV-27203A/B During each quarterly ESG room cooling subsystem valve exercise test, monitor direct expansion unit refrigerant pressure in condenser and verify that pressures within specified range are maintained.
Perform part-stroke exercising of valves HV-27203A/B.
Relief denied.
In conjunction with Unit 2 ESG room cooling subsystem flow balancing, conducted once each 18 month period, perform opening exercise tests of valves HV-27203A and B to fullopen positions.
No stroke timing willbe performed.