ML20127L059
| ML20127L059 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 01/19/1993 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20127L057 | List: |
| References | |
| 93-1-01, 93-1-1, NUDOCS 9301260320 | |
| Download: ML20127L059 (6) | |
Text
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4 Special Procedure 93-1-01 i
Rev.O Bypassing Main Steam Une Radiation Detectors Mbile Placing Condensate Demineralizers In Senice Following an URC l
1.
OBJECITVE l
1 1.1 To provide guidance on bypassing the main steam line radiation detectors while placing a condensate demineralizer in senice only after the demineralizer has been j
ultrasonically cleaned and only during power operation above 20% power.
2.
ACCEPTANCE CRITERIA f
2.1 None i
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3.
REFERENCES i,
3.1 Technical Specification tables 3.1.1 and 3.2.1.
f 3.2 OP 315, " Condensate System".
3.3 Memo TC-MPI-93-01, To Distribution From P. J. Miner, "Temporay Waiver of Compliance Regarding MSLRM Trip Function", dated January 14, 1993.
4.
PREREQUISITES 4.1 ENSURE Chemistry Technician #1 statioried at reactor water sample hood located on 3rd floor reactor building has a supply of sample bottles with lids off.
4.2 ENSURE reactor power is maintained stable (no control rod motion,- or recirculation flow changes) and no other evolutions are in progress in the vicinity of the mam steam lines or main turbine.
4.3 RESTRICT access to Turbine Deck.
4.4 CONDUCT a briefing with personnel involved which includes, bin is not limited to the following-Verification of no work mgoing in the area of the Main Steam Lines or Main Turbine, Control Room Operator to SCRAM reactor, CLOSE Off-Gas Discharge Valve, CLOSE MSIVs, in the event of Main Steam Line High-High Radiation and Off-Gas Monitor High-High Radiation Alarms (even if the alarm clears), since these two indications indicate failed fuel.
9301260320 930119~
PDR ADOCK 05000245
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l Special Procedure 93-1-01 Page 2 of 6 Rev.0 Chemistry Technician #2 on 1st floor Turbine Building to notify PEO to isolate condensate demineralizer being placed in senice if condensate dissolved oxygen reading is increasing at a rate which would exceed 150 b
PP.
Chemistry Technician #1 on 3rd floor Reactor Building to take a baseline sample prior to valving demin in senice, and to monitor local reactor water conductivity. On increase in conductivity, Chemist 2y Technician to take samples until conductivity decreases or is directed otherwise.
PEO to crack efDuent valve until flow is detected by noise or flow indication.
ihe following personnel are in constant communicetions by headsets:
Chenustry Technician #2 - 1st floor Turbine Building, condensate demineralizer panel Chemistry TechrJcian #1 - 3rd floor Reactor Building, reactor water sarmle hood PEO - condensate demineralizer effluent va!.e,1-CD-2(A-G)
Control Room Operator - CRP 910 a
l If problems are encountered while placing demineralizer in sewice which would reqmre bypass' g the' Main Steam Line Radiation Monitor for m
greater than one hour, NOTIFY the Duty Officer, to INITIATE a PIR, CLOSE the demineralizer effluent valve, and RETURN the Main Steam Line Radiation Monitor to service.
4.5 ENSURE Off-Gas Radiation Monitors are operable.
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5.
PRECAUTIONS NOTI Technical Specifications allow for bypassing of the Main Stecm Line Radiation Monitor for a maximum of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> per evolution.
5.1 With the Trip Test toggle switches in the " Trip Test" position a Main Steam Line HI HI Radiation alarm will not cause the normal automatic actions (scram and MSIV closure).
5.2 During the performance of this procedure it is possible to receive the Main Steam Line Hi and Hi Hi Radiation Alarms, willlout having failed fuel.
Special Procedure 93-1-01 Page 3 of 6 Rev.0 6.
PROCEDURE 6.1
[ Chemistry Dept) RECYCLE demineralizer in accordance with Chemisty Procedure CP SO4K for a minimum of 20 minutes.
6.2
[PEO] ENSURE condensate demineralizer to be placed in senice has been properly vented by the Chemistry Department.
6.3 During the performance of steps 6.9 through 6.12.4, PERFORM the following precautions:
6.3.1
[ Chemistry Technician #2] MONITOR condensate oxygen levels while shifting demineralizers, as maximum oxygen levels should not exceed 150 ppb.
6.3.2 [ Control Room Operator] MONITOR Main Steam Line radiation levels while MSLRMs are bypassed.
I 6.3.3 [ Control Room Operator] MONITOR Off-Gas Radiation levels while MSLRMs are bypassed.
6.3.4 ESTABLISH communications between Chemistry Technician #2 monitoring oxygen levels, Chemistry Technician #1 obtaining reactor wuter samples, Control Room Operator monitoring Main Steam Line Radiation and Off-Gas radiation levels and the PEO operating the condensate demineralizer outlet valve,1-CD-2 (A-G).
NOTE Technical Specifications allow for bypassing of the Main Steam Line Radiation Monitor for a maximum of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> per evolution.
6.4
[ Chemistry Technician #1] IF at any time the local reactor water conductisity reading increases, SAMPLE reactor water until conductisity decreases to normal levels or as directed otherwise.
6.5 (Control Room Ooerator] IF at any time while the Main Steam Line Radiation Monitor is bypassed, and the Main Steam Line Hi Fi Radiation and Off-Cras Hi Hi Radiation Alarms are received (even if the alarrr s clear), SCRAM the reactor, CLOSE the off-gas discharge valve (1-OG-54), and CLOSE the MSIVs (1-MS-1 A through ID and 1-MS-2A through 2D).
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Special Procedure 93-1-01 Page 4 of 6 Rev.0 CAUTION Trip Test toggle switches spring retum to normal. Trip Test toggle switches bypass the j
Group I isolation and scram function of the main steam line radiation detectors.
2 1
NOTE 4
Easily removable mechanical blocking devices may N utilized to hold the Trip Test Switch in the " Trip Test" position.
6.6
[ Chemistry Technician #2] READ conductivity of water leasing condensate demineralizer bed on recycle conductivity meter (uncorrected), CI-9-34 on panel 22%.
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6.7 When conductivity (CI-9-34 on panel 22%) is less than 0.1 mhos, then NOTIFY
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Control Room Operator.
6.8
[ Control Room Operator] LOG SS/SCO authorization of bypassing Main Steam Line radiation monitor and placing condensate demineralizer in sersice at the time the Trip Test switches are moved.
6.9
[ Control Room Operator] HOLD Trip Test toggle switches for the main steam line radiation detector drawers, PRM-1705-2A and C in the " TRIP TEST' position.
6.10
[ Control Room Operator] VERIFY downscale light illummates on PRM-1705-2A and C.
6.11
[Cor: trol Room Operator] MONITOR main steam line radiation on the B and D main steam line radiation detector drawers, PRM-1705-2B and D.
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r Special Procedure 93-1-01 Page 5 of 6 Rev.0 i
6.12
[ Control Room Operator] NOTIFY Chemistry Technician #2 and. Chemistry Technician #1 effluent valve 1-CD-2(A-G) is about to be opened, and PROCEED as follows:
NOTE l
Oxygen level and main steam line radiation level may not increase immediately upon opening the demmeralizer outlet valve. Delay time is approximately two (2) minutes.
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6.12.1 [PEO] CRACK OPEN deminemlizer outlet valve 1-CD-2 (A-G).
I 6.12.2 [PEO] WAIT three (3) minutes for resporse from the Chemistry Technician monitoring condensate demineralizer flowTnte and condensate j
oxygen levels and the Control Room Operator monitoring main steam line l
radiation levels.
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6.12.3 [PEO] When condensate oxygen levels have stabilized, and the Control l
Room Operator indicates there is no increase in main steam line radiation level, CONTINUE to open condensate deminemlizer outlet valve in 1/2 i
tum increments waiting three (3) minutes beteen tums, until the vaRe is i-two tums open, while monitoring condensate oxygen levels and main steam line radiation levels.
mamme NOTE After condensate demineralizer has been opened approximately two (2) turns, oxygen has been fhished from the deminemlizer.
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6.12.4 [PEO] After condensate oxygen level has been stabilized and has mturned j
to nonnal, OPEN condensate demineralizer outle: nlve comp:etely.
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6.13
[ Control Room Operator] Five minutes after the deminemlizer effluent valve,1-CD-2(A-G) is full open VERIFY no abnomml main steam line radiation conditions exists, then RET FASE Trip Test toggle switches.
}'-
.[ Control Room Operator] CYCLE reset switches on main steam line radiation 6.14 detectors drawers PRM-1705-2A and C, and VERIFY downscale lights extinguish 1
and indication retums to normal background readings.
a 6.15
[ Control Room Operater] LOG and NOTIFY SS/SCO Main Steam Line Radiation j
Monitors am retumed to senice.
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Special Procedure 93-1-01 Page 6 of 6 Rev 0 6.16
[PEO] STOP recycle pump.
6.17
[PEO] CLOSE condensate demineralizer recycle valve 1-CD-3 (A-G).
7.0 RESTORAllON 7.1 LOG in SS Log independent verification of Main Steam Line Radiation Monitor retumed to Senice.
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