ML041140205
| ML041140205 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 01/06/2004 |
| From: | Pickley T Exelon Generation Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 50-461/04-301 50-461/04-301 | |
| Download: ML041140205 (45) | |
Text
FACILITY POST-EXAMINATION COMMENTS FOR THE CLINTON INITIAL EXAMINATION - JANUARY 2004
An Exeion/British Energy Company Clinton Power Station R.R. 3 Box 228 Clinton, IL 61727-9351 U-603651 January 21,2004 Mr. J. L. Caldwell Regional Administrator, Region Ill U. S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Clinton Power Station Facility Operating License No. NPF-62 NRC Docket No. 50-461
Subject:
Comments Regarding Reactor Operator License Examination Question Administered on January 15, 2004 This letter is to request that the answer key be modified for question #78, to indicate B as the correct answer on the Senior Reactor Operator License Examination administered on January 15, 2004. Enclosed are the question and associated documentation that justifies this request.
If you should have any questions concerning this matter please contact Mr. K. A. McCall at (217) 937-4001 or Mr. Michael R. Helton at (217) 937-4046.
Sincerely yours, Regulatory Assurance Manager Clinton Power Station EET/blf Attach men ts cc:
NRC Clinton Licensing Project Manager (w/o Attachment)
NRC Resident Office, V-690 (w/o Attachment)
M. A. Bies, NRC Region Ill Licensing Assistant
U-603651 January 21,2004
Subject:
Comments Regarding Reactor Operator License Examination Question Administered on January 15, 2004 bcc:
R. S. Bement, V-275 (w/o Attachment)
K. J. Polson, T-31A (w/o Attachment)
NRC Document Control Desk (w/o Attachment)
Director - Licensing, Mid-West Regional Operating Group (wlo Attachment)
Document Control Desk Licensing (w/o Attachment)
P. K. Ryan, T-31 R, (w/o Attachment)
M. R. Helton, V-922 (w/o Attachment)
K. A. McCall, V-922 (w/o Attachment)
Clinton Power Station 2003 NRC Written Exam ILT 02-1 I
d RECORD #78 SRO EXAM Discussion Answer B is correct for the operational condition. In this condition the normal supply for sealing steam has been lost (seal steam evaporator) and the question indicates that the alternate supply (Main Steam) is available since the MSlVs are open. The proper action is per CPS No. 3107.01 GLAND SEAL 8.1.4, INFREQUENT OPERATION, Operating Without the Gland Steam Seal Evaporator, which has you place the Main Steam Supply in service.
Two limitations are associated with this action in CPS No. 3107.01:
Limitation 6.2 states, Main Steam should not be applied directly to the Gland Steam Seal Header except in an emergency and then only as a last resort and until Auxiliary Steam can be made available to supply the header. Since the pressure regulator bypass valve has failed to open and Auxiliary Steam will not be available for 20 minutes then Main Steam is the last resort. If Main Steam is not used then two emergency conditions may occur: break vacuum and the condenser would be lost as a heat sink or vacuum is not broken and cool air drawn across the condenser seals may damage them.
Limitation 6.3 states, Following a loss of steam supply to the Steam Seal Evaporator tubes, the stored energy of the system will provide sealing steam for less than 5 minutes. The operator must supply the seal header from Main Steam or Auxiliary Steam within this time or air will be drawn in across the turbine glands. This limitation indicates the concern is seal damage and that seal steam supply should be restored within 5 minutes. Since Main Steam is available it should be aligned per the procedure.
Answer A was the original answer specified. This was based on CPS 31 12.01 CONDENSER VACUUM (CA) that contains a caution that states During shutdown, if gland sealing steam is lost, condenser vacuum must be broken immediately to prevent drawing cool air across the seals. Given the conditions of the question, Gland Steam can be readily supplied by Main Steam thus restoring gland sealing steam pressure.
This action is preferable to breaking condenser vacuum since it would prevent drawing cool air across the seals and prevent a loss of the condenser as the heat sink.
CPS NO. 3107.01 and 31 12.01 are attached with these above sections highlighted.
CPS has initiated an issue (196251) to clarify the use of the caution in CPS 31 12.01.
Recom menda tion/J us tifica t ion Accept B as the correct answer / Main Steam is available to support gland seal.
A is incorrect since Main Steam can restore the gland seal pressure.
C is still incorrect since the system cannot be operated without any seal header pressure for greater than 5 minutes per Limitation 6.3.
D is still incorrect because these switches are used as directed by CPS No. 3101.01,
MAIN STEAM for recovery of MSLs and the MSlVs are currently open.
W
P I
f U' Clinton Power Station 2003 NRC Written Exam ILT 02-1 Question Topic ROSRO: TIER: GROUP:
No:
KA No:
RO:
SRO:
Cog Level:
78 SRO 1
1 295006 2950062132 3.4 3.8 High SystemlEvolution Name:
SCRAM Category Statement:
Conduct of Operations KA Statement: Ability to explain and apply system limits and precautions.
UserlD:
Topic Line:
Question Stem:
A plant shutdown is in progress with all rods in and MDRFP running. The MSlVs are open and condenser vacuum is 28" HG VAC. The Aux boiler will be available in 20 minutes. Annunciator HIGH OR LOW PRESSURE STEAM SEAL HEADER 5019-3D alarmed and the operator reports steam seal pressure is 0 psig. The operator tries to open the pressure regulator bypass valve with no success.
What action is required and Why?
A: Break condenser vacuum to prevent drawing relatively cool air across the turbine seals.
B: Use Main Steam to supply the steam seal header to prevent a loss of condenser vacuum.
C: When the Aux Boiler is available, Shift to steam seals Aux Steam to prevent a loss of vacuum.
D: Place the Div 1,2,3 & 4 Cond Low Vacuum Bypass Switches on 1H13-P601 to BYPASS to prevent Answer: Task Question Source:
Question A
New Difficulty Objective LP85256.1.I4 Medium MSlV closure.
- 'd Reference Provided :
None
Reference:
CPS 31 12.01 CONDENSER VACUUM (CA)
Explanation:
CPS 31 12.01 CONDENSER VACUUM (CA) contains a caution that states "During shutdown, if gland sealing steam is lost, condenser vacuum must be broken immediately to prevent drawing cool air across the seals."
Distracters:
B is incorrect main steam should only be used in an emergency, the plant is being shutdown and all rods C is incorrect as breaking vacuum is required. Aux steam will not be available for 20 minutes.
D is incorrect as breaking vacuum is required.
55.43 section(s): (5) are already inserted.
SRO Justification: SRO assess plant conditions during an abnormal events to determine appropriate procedure/actions to mitigate the event, as required. SRO from-memory knowledge of system precautions and limitations is required to make this assessment.
iu:
Date Written:
10/22/2003 Author: Pickley
CPS 3 1 0 7. 0 1 TURBINE GLAND SEAL (GS) i, SCOPE OF REVISION:
Incorporated Specific Revision l2a/b/c and Temp Change 12d, which added missing step (8.1.2.3.2).
0 Specific Rev. 13a [Landinl : EDITORIAL -
CR 130068-04: Added 4.6 PRECAUTION and trigger notes to capture lessons learned regarding SPE vacuum impact on OG effluent flow.
ORIGINATOR : Brian Zimmerman SQR: M A
~
CLASS CODE: NN'D APPROVAL DATE : 10/21/02 CURRENT CHANGES TO GENERAL REVISION 0
13a 01 122103 1,4, 9, 10, 12, 13, 14, 16, 19,21 Q
0 0
0 C h a n g e #
Date List of Affected Pages R e v.
13a Page 1 of 24
CPS 3107.01 TABLE OF CONTENTS (Section 8.0 Only)
Page
-+4 8.0 PROCEDURE 8.1 NORMAL SYSTEM OPERATION 8.1.1 Normal Startup 8.1.1.1 Steam Packing Exhauster (SPE) System ______________._______
6 9
8.1.1.2 Startup of Sealing Steam System Using Aux Steam 8.1.2 Normal Operation 8.1.2.1 Gland Steam Seal System 8.1.2.2 13 Steam Packing Exhauster System --..__._-._.-____________________
13 14 14 8.1.2.3 8.1.2.4 Switching to Non-running SPE - Condenser/Blower Switching to Non-running SPE Blower 8.1.2.5 Running an Out of Service Gland Seal Exhauster Blower lGSOlCA (1GSOlCB) (1GS02CA) (1GS02CB) 16 8.1.4 INFREQUENT OPERATION 8.1.4.1 Operating Without the Gland Steam Seal Evaporator 19 19 8.1.4.2 Operating with Worn Glands 8.2 ABNORMAL PERFORMANCE 8.2.1 Abnormal Levels in the Gland Steam Seal Evaporator 8.2.1.1 Evaporator Shell Level Control 8.2.1.2 Evaporator Drain Level Control 8.2.2 8.2.3 Abnormal Steam Seal Supply Header/
20 20 21 Steam Packing Exhauster/Condenser Level Control.-.-_._.__
22 Evaporator Pressure d
Rev. 13a Page 2 of 24
1.0
- u' 2. 0 2. 1 2. 1. 1 2.1.2 2.1.3 2. 1. 4 2. 1. 5 2. 2 2. 2. 1 3.0
- -d CPS 3107.01 PURPOSE The purpose of this procedure is to provide instructions for placing the Gland Seal Supply System and Steam Packing Exhauster System in their normal operational modes and to provide corrective action in case of abnormal operation.
DISCUSSION/DEFINITIONS Discussion The purpose of the Gland Seal System is to supply steam at the required pressure to serve the following components:
Main Turbine Shaft Seals Reactor Feed Pump Turbine Shaft Seals Packing Seal Steam
- 1. Main Turbine Stop Valves 2.
Main Turbine Control Valves 3.
Combined Intermediate Valves
- 1) The Gland Seal System performs the above functions so that air will not leak into the Main Condenser past the seals and to ensure radioactive steam does not leak out to the Turbine Building.
The purpose of the Steam Packing Exhauster System is to condense the sealing steam exhaust and return the water to the Main Condenser, also to get rid of any non-condensable gasses and discharge them to the Common Station W A C Vent.
Definitions The sources of steam available to the Steam Seal System are :
- 1. AUXILIARY STEAM: supplies seal header directly.
2.
MAIN STEAM: can supply seal header directly or supply gland steam seal evaporator.
3.
SEVENTH STAGE EXTRACTION STEAM:
supplies gland steam seal evaporator.
RESPONSIBILITY The Operations department head is responsible for ensuring the proper implementation of this procedure.
Rev. 13a Page 3 of 24
CPS 3107.01 4.0 PRECAUTIONS 4.1 When operating the Aux Stm Supply To Stm Seal Hdr Byp, 1GS-S7 and Evap Mn Stm Supply Bypass Vlv, 1GS-ESFV-2; open the valves slowly and monitor pressures closely as the pressure controllers are bypassed.
4.2 If the Gland Seal System is incapable of maintaining a supply of steam at the required pressure during normal operation to its loads, the following events may happen:
- 1. Decreased condenser vacuum
- 2. Turbine trip
- 3. Subsequent reactor scram (turbine trip > 33.3% RTP)
- 4. Group 1 isolation 5.
Possible high airborne radiation in Turbine Building 4.3 When supplying the Gland Seal System header directly from Main Steam, verify that radioactive steam is not blowing to the Turbine Building and release limits to the Common Station HVAC Vent are not exceeded.
Do -
not apply sealing steam to a stationary turbine, as local heating and subsequent rotor bowing may occur. Prior to Gland Seal System startup, ensure that the turbines are jacking. Exceptions may be made with verbal concurrence from the associated System Managers.
4.4
- Li 4 :5 Coordinate with ROC Operator when changing Aux Steam loads.
0 4.6 SPE Inlet Pressure is normally maintained at the optimal - 11" H20 vacuum (normal range is 10 - 14" H20).
When SPE vacuum drifts high (i.e., cooler lake temps),
the Off-Gas effluent flow will trend higher (possibly due to flashing in the SPE Condenser loop seal at the higher SPE vacuum).
5. 0 PREREQUISITES 5.1 Verify the following systems are available to support startup of the Gland Seal Systems:
- 1. Required portions of Cycled/Makeup Condensate in operation per CPS 3208.01, Cycled/Makeup Condensate (CY/MC).
CPS 3214.01, Plant Air (IA & SA).
CPS 3502.01, 480V Distribution System.
- 2. Required portions of Plant Air in operation per
- 3. All required 480 VAC power distribution energized per Rev. 13a Page 4 of 24
.W CPS 3107.01 5.1 (cont d)
- 4. Required portions of Condensate, Condensate Booster in operation per CPS 3104.01, Condensate/Condensate Booster (CD/CB).
Required portions of Auxiliary Steam in operation per CPS 3202.01, Operating Electrode Boilers And Reboilers.
Required portions of Circulating Water in operation per CPS 3113.01, Circulating Water (CW).
5.
- 6.
5.2 Verify the following lineups are available to support system startup:
- 1. Required portions of CPS 3107.01V001, Turbine Gland 2.
Required portions of CPS 3107.01V002, Turbine Gland
- 3. Required portions of CPS 3107.01E001, Turbine Gland Seal Valve Lineup completed.
Seal Instrument Valve Lineup completed.
Seal Electrical Lineup completed.
0 5.3 Steam Packing Exhauster Blowers discharge to the vent stack.
- 1. Contact RP prior to starting a blower.
2.
Ensure that stack effluent is being monitored.
5.4 Prior to supplying sealing steam to turbine glands, the
-LA turbine must be rotating to prevent local heating and turbine rotor bowing. Exceptions may be made with verbal concurrence from the associated System Managers.
6.0 LIMITATIONS 6.1 A minimum pressure of 50 psig Main Steam is needed at the inlet to the Gland Steam Seal Evaporator to seal the turbine with normal packing clearances.
6.2 Main Steam should not be applied directly to the Gland Steam Seal Header except in an emergency and then only as a last resort and until Auxiliary Steam can be made available to supply the header.
6.3 Following a loss of steam supply to the Steam Seal Evaporator tubes, the stored energy of the system will provide sealing steam for less than 5 minutes. The operator must supply the seal header from Main Steam or Auxiliary Steam within this time or air will be drawn in across the turbine glands.
7.0 MATERIALS/TEST EQUIPMENT - None Rev. 13a Page 5 of 24
CPS 3107.01 W
8.0 PROCEDURE 8.1 Normal System Operation 8.1.1 Normal Startup
- 1. Steam Packing Exhauster (SPE) System NOTE IfSPE has been out of service for an extendedperiod of time, thenfilling and venting of jLT-GS030(032) reference legs may be required.
Annunciator 5019-3B(C), HIGH LEVEL STM PACKING EXH A(BY DRNPIPE may alarm during thefill and vent.
Without a Steam Packing Exhauster Blower running, level should be no higher than the overflow line to the equipment drain system. This corresponds to an indicated level of - -6(i.e., level in the green band with the tape set at -6).
- 1) Perform the following to place SPE Drain Level Controller, lLIC-GS030(032), in service
[1LIC-GS030 (032) is located at 1PAOSJI :
a) Verify/place LLIC-GS030
( 0 3 2 ) in manual and close.
b) Place 1LIC-GS030 (032) tape setpoint at = - 8.
c) IF SPE has been out of service for an extended period of time, -
THEN contact C&I to fill and vent reference legs of lLT-GS030(032) per CPS 8801.12, Local Mounted Instrument Valve Operation and Venting.
Rev. 13a Page 6 of 24
CPS 3107.01 8.1.1.1 (Contd)
Ll NOTE Maintaining SPEKdsr drain level too high will cause annunciator 501 9-3B(C), HIGH LEVEL STM PACKING EXH A(BY DRN PIPE to alarm, and may result in unnecessary water being sent to the equipment drain system.
W d) IF indicated level on lLIC-GS030(032) is:
in OR above the green band, THEN perform either:
- a. OR b. below;
- a. Place lLIC-GS030(032) in AUTO, AND IF indicated level is above the green band, THEN verify that lLIC-GS030(032) positions 1GS022A (B) to control level.
ll I1 CAUTION SPEKdsr drain level staying or returning above the green band, may indicate the presence of a SPE condenser tube leak.
- b. -
IF indicated level on lLIC-GS030(032) is above the green band, -
THEN level, in the SPE/Cdsr drain line, may be lowered by performing the following:
i)
Manually operate 1GS022A(B) using 1LIC-GS030 (032) Open/Close pushbuttons.
ii 1 When indicated level on lLIC-GS030(032) is in the green band, place 1LIC-GS030(032) in auto.
iii) SPE/Cdsr lA(1B) D r n, lGS024A(B) may be operated as necessary to assist in maintaining level.
When no longer needed for level control, shut/verify shut 1GS024A(B).
iv)
Rev. 13a Page 7 of 24
CPS 3107.01 8.1.1.1 (Contd) 0 NOTE If level in the SPE/Cdsr drain line is maintained too low, a condenser air in-leakagepath may be created from the equipment drain system to the condenser due to leakage through I GS022A (B).
- 3)
- 4) e) IF indicated level on lLIC-GS030(032),is below the green band, THEN fill the SPE drain line loop seal by opening lGS020A(B),SPE Cdsr lA(1B) CY Sys Supp Isol, AND WHEN -
indicated level on lLIC-GS030(032) is in the green band:
Shut 1GS020A(B).
0 Place lLIC-GS030(032) in AUTO f) Adjust lLIC-GS030(032) tape setpoint to 0.
Establish/verify condensate system flow through the on-coming SPE Condenser as follows:
a) Verify oncoming SPE Condenser Outlet Valve, b) At 1H13-P8701 verify/place SPE Cdsr 1A/1B lCD005A(B) is open.
Selector Switch to the on-coming SPE lA(1B) position and verify the following:
On-coming SPE Condenser Inlet Valve, 0
Off-going/standby SPE Condenser Inlet 1CD004A(B) is open.
Valve, 1CD004B (A) is closed.
Line up SPE/Cdsr lA(1B) for service as follows:
a) Place SPE lA(1B) Isol Vlv lGS-El(lGS-E2) switch b) Verify associated drain valve SPE 1A(B) Drn c) Place control switch for the opposite SPE in ISOL VLV OPEN position.
Vlv, 1GS043A(B) is closed.
lB(1A) Isol Vlv, 1GS-E2 (El) in DRJS VLV OPEN posit ion.
d) Verify associated drain valve SPE 1 B ( A ) Drn Vlv, 1GS043B (A) opens.
Start one associated blower.
W Rev. 13a SPE Blower 1A1, lGSOlCA I SPE Blower 1A2, 1GSOlCB SPE Blower 1B1, 1GS02CA SPE Blower 1B2, 1GS02CB I Page 8 of 24
CPS 3107.01 8.1.1.1 (Cont 'd) 0
- 5)
Adjust SPE Inlet Pressure to - 11" H20 vacuum (normal range is 10 - 14" H20) by locally operating SPE Blower Suct Is01 Valve, 1GS604AA (AB/BA/BB).
cis'=
See 4.6 PRECAUTION related to SPE vacuum.
- 6) After SPE Inlet Pressure is stabilized, verify that level is being properly maintained by SPE Drain Level Controller 1LIC-GS030 (032).
Repeat step 8.1.1.1.l.d)-f) as necessary.
- 2. Startup of Sealing Steam System Using Aux Steam CAUTION Do not apply sealing steam to a stationery turbine, as local heating and subsequent rotor bowing may occur. Exception may be made with verbal concurrence from the associated System Managers.
- 1) Ensure turbines are jacking.
- 2) Open Aux Stm Supply To Stm Seal Hdr, 1GS041.
CAUTION II Ifcondenser is not under a vacuum, Condenser Vacuum Breaker should be open prior to placing steam seals in service to prevent over pressurizing condenser and rupturing blowout diaphragms.
- 3) IF condenser is -
not under a vacuum, THEN ensure Cdsr Vacuum Bkr, 1CA007 is open.
II CAUTION I1 When opening A m Stm Supply To Stm Seal Hdr Byp, IGS-S7 do it in small increments to allow steam seal header to pressurize slowly to - 4psig.
- 4) Slowly operate Aux Stm Supply To Strn Seal Hdr Byp, 1GS-S7 to obtain - 4 psig in the steam seal header.
NOTE Pe$orm the next two steps simultaneously to maintain steam seal headerpressure.
- 5) Open Aux Stm Supply to Stm Seal Hdr Vlv, 1GS-S6.
Rev. 13a Page 9 of 24
CPS 3107.01 8.1.1.2 (Cont'd)
- 6) IF while opening Aux Stm Supply To Stm Seal Hdr z v, 1GS-S6 the steam seal header pressure begins increasing, THEN operate Aux Stm Supply To Stm Seal Hdr Byp, 1GS-S7 to maintain - 4 psig until 1GS-S6 is fully open. -
- 7) Slowly close Aux Stm Supply To Stm Seal Hdr Byp, 1GS-S7 while maintaining - 4 psig steam seal header pressure.
- 8) -
IF unable to maintain steam seal header pressure at - 4 psig with 1GS-S7 fully closed, THEN operate Aux Stm Supply To Stm Seal Hdr Byp, 1GS-S7 as necessary to maintain steam seal header at - 4 psig.
- 9) Verify Stm Seal Aux Feed Header Cont Valve, 1GS-SSAFV is controlling steam seal header pressure at - 4 psig.
- 10) Adjust SPE Inlet Pressure to - 11" H20 vacuum (normal range is 10 - 14" H20) by locally operating SPE Blower Suct Is01 Valve, 1GS604AA (AB/BA/BB).
0 G=
See 4.6 PRECAUTION related to SPE vacuum.
iJ'
- 11) Verify that level is being properly maintained by SPE Drain Level Controller lLIC-GS030(032).
Repeat step 8.1.1.1.l.d)-f) as necessary.
- 3. Steam Seal Supply System CAUTION Do not apply sealing steam to a stationary turbine, as local heating and subsequent rotor bowing may occur. Exception may be made with verbal concurrence from the associated System Managers.
- 1) Ensure turbines are jacking.
- 2) Locally, open and lock open the following:
Steam Seal Evap Blowdown header isolation, 1GS046.
Steam Seal Evaporator Vent, 1GS047.
'W' Rev. 13a Page 10 of 24
CPS 3107.01 8.1.1.3 (Contd)
NOTE When a Steam Seal Evaporator (SSE) Hi-Hi Level of 4 inches (3.4 - 4.6 inches) exists, SSE Feedwater Isolation Valve, 1 GS-S9 will not open.
- 3) -
IF A SSE Hi-Hi Level of 4 exists, THEN Drain the SSE shell locally via 1TF064, SSE Shell Drain Valve to a level of - 0.
0 Verify level in SSE is established at - 0.
CAUTION Do not open Evap Mn Stm Supp Byp Vlv, 1 GS-ESFV-2 or Evap Mn Stm Supply Vlv, 1 GS-S8 unless Main Steam lines are pressurized or isolated from reactor to prevent drawing a vacuum in reactor vessel.
- 9)
Slowly operate Evap Mn Stm Supply Byp Vlv, 1GS-ESFV-2 until a small increase of e 5 psig is seen in SSE tube pressure.
Allow SSE to soak for - 30 minutes.
During this soak period, operate 1GS-ESFV-2 as necessary to keep SSE tube pressure between 0 and 5 psig.
At completion of soak period, slowly operate 1GS-ESFV-2 to raise SSE tube pressure at a rate not to exceed 5 psig per minute.
WHEN - SSE tube pressure is 0 45 psig, -
and SSE shell pressure is 0 10 psig, THEN Slowly operate Stm Seal Supply Bypass Vlv, 1GS-S2 as necessary to maintain - 4 psig in steam seal header.
Open Stm Seal Supply Vlv, 1GS-S1 while closing Verify regulator maintains steam seal pressure 1GS-S2.
at - 4 psig.
Rev. 13a
\\
Page 11 of 24
CPS 3107.01 8.1.1.3 (Cont' d)
NOTE
- ,*/
Opening 1 GS-S8 places the Evap Mn Strn Supp Cont Uv, 1 GS-ESFV-1 on line. I GS-ESFV-1 should throttle to control SSE tube side supply pressure based on system demand.
- 10) Open Evap Mn Stm Supply Vlv, 1GS-S8 while controlling SSE tube pressure with 1GS-ESFV-2.
- 11) WHEN - 1GS-ESFV-1 is maintaining tube pressure between - 50 psig and 80 psig, THEN Fully close 1GS-ESFV-2.
- 12) -
IF System was started up on Aux Steam System, shift steam seal header to SSE:
THEN Perform the following to a) Shut 1GS-S6, Aux Stm Supply To Stm Seal Hdr Vlv
'W' 0
b) Verify steam seal header pressure is - 4 psig.
c) Shut 1GS041, Aux Stm Supply To Stm Seal Hdr Vlv
- 13) Locally, open Ext Stm To SSE Supply, 1GS057.
Using local indicating lights behind 1PL23J, south of SSE room, verify Ext Stm Supp Line Drn Valve, 1GS058 closed.
- 14) -
IF Main Turbine is reset and 7th stage extraction steam pressure is greater than Main Steam supply to the SSE, THEN :
a) At lPLOlJ, verify open both Ext Stm Feed To SSE Chk Valves:
0 lGSOOl 1GS002 verify Ext Stm Drn Vlv, 1GS042 closes.
b) At 1H13-P870,
- 15) Adjust SPE Inlet Pressure to - 11" H20 vacuum (normal range is 10 - 14" H20) by locally operating SPE Blower Suct Is01 Valve, 1GS604AA (AB/BA/BB).
- See 4.6 PRECAUTION related to SPE vacuum.
- 16) Verify that level is being properly maintained by SPE Drain Level Controller lLIC-GS030(032).
Repeat step 8.1.1.1.l.d)-f) as necessary.
Rev. 13a Page 12 of 24
CPS 3107.01 8.1.2 0
0 i/
u Rev NORMAL OPERATION
- 1. Gland Steam Seal System
- 1) Normal operation consists of 7th stage extraction steam supplying Gland Steam Seal Evaporator.
- 2) The Gland Steam Seal Evaporator should be controlling the following parameters indicated in the control room:
0 SSE Shell Level - 0 inches.
NOTE There is no regulator when operating SSE on #7 extraction. Shell pressure is load dependent.
- 2.
13a 0
SSE Shell Pressure 10 - 50 psig when supplied from Main Steam and 35 - 80 psig when supplied by Extraction Steam.
0 SSE drain level - no level alarms.
Steam Seal Header Pressure - 4 psig.
0 SSE tube pressure 126 psig with normal seal clearances, higher when operating with worn glands, but not to exceed - 145 psig.
Steam Packing Exhauster System Normal operation of this system consists of running one Steam Packing Exhauster Blower and Condenser pair.
As necessary, adjust SPE Inlet Pressure to maintain - 11" H20 vacuum (normal range is 10 - 14" H20) by locally operating SPE Blower Suct Is01 Valve, 1GS604AA (AB/BA/BB).
rip See 4.6 PRECAUTION related to SPE vacuum.
Verify that level is being properly maintained by SPE Drain Level Controller lLIC-GS030(032).
Repeat step 8.1.1.1.1.4)-6) as necessary.
Page 13 of 24
CPS 3107.01 8.1.2 NORMAL OPERATION (cont d) il
- 3. Switching to Non-runninq SPE Blower
- 1) Start the non-running blower for the operating SPE/Cdsr.
0 0
- 2) Shutdown the off-going blower for the operating SPE/Cdsr.
- 3) Adjust SPE Inlet Pressure to - 11 H20 vacuum (normal range is 10 - 14 H20) by locally operating SPE Blower Suct Is01 Valve, 1GS604AA (AB/BA/BB).
CF See 4.6 PRECAUTION related to SPE vacuum.
- 4. Switching to Non-running SPE-Condenser/Blower
- 1) Line up condensate flow to the non-running SPE Condenser per CPS 3104.01, Condensate/Condensate Booster (CD/CB).
- 2) Perform the following to place the on-coming SPE Drain Level Controller, lLIC-GS030(032), in service (1LIC-GS030 (032) is located at 1PAOSJ) :
a) Verify/place lLIC-GS030(032) in manual and close.
b) Place lLIC-GS030(032) tape setpoint at w -8.
c) IF SPE has been out of service for an extended period of time, THEN contact C&I to fill and vent reference legs of lLT-GS030(032) as follows per CPS 8801.12, Local Mounted Instrument Valve Operation And Venting.
NOTE Maintaining SPE/Cdsr drain level too high will cause annunciator 5019-3B(C), HIGH LEVEL STM PACKING EXH 1
(,B? DRN PIPE to alarm and may result in unnecessary water being sent to the equipment drain system.
d) -
IF indicated level on lLIC-GS030(032) is:
in OR above the green band, -
THEN perform either bulleted items below; Place lLIC-GS030(032) in AUTO, AND IF indicated level is above the green bzd, THEN verify that lLIC-GS030(032) positions lGS022A(B) to control level.
Rev. 13a Page 14 of 24
CPS 3107.01 8.1.2.4 (Cont ' d)
CAUT I ON SPE/Cdsr drain level staying or returning above the green band, may indicate the presence of a SPE condenser tube leak.
0 IF indicated level on lLIC-GS030(032) is above the green band, THEN level, in the SPE/Cdsr drain line, may be lowered by performing the following:
i) Manually operate 1GS022A(B) using lLIC-GS030(032) Open/Close pushbuttons.
ii) When indicated level on 1LIC-GS030(032) is in the green band, place lLIC-GS030(032) in auto.
iii) SPE/Cdsr lA(1B) Drn, 1GS024A(B) may be operated as necessary to assist in maintaining level.
iv) When no longer needed for level control, shut/verify shut lGS024A(B).
NOTE I f level in the SPE/Cdsr drain line is maintained too low, a condenser air inleakage path may be created from the equipment drain system to the condenser due to leakage through I GS022A(B).
e) IF indicated level on lLIC-GS030(032) is below the green band, -
THEN fill the SPE drain line loop seal by opening lGS020A(B), SPE Cdsr lA(1B) CY Sys Supp Isol, AND When indicated level on lLIC-GS030(032) is in the green band:
0 Shut 1GS020A(B).
Place lLIC-GS030(032) in AUTO f) Adjust lLIC-GS030(032) tape setpoint to 0".
- 3) Line up Steam Packing Exhauster/Condenser lA(1B) for service as follows:
a) Place SPE lA(1B) Isol Vlv lGS-El(lGS-E2) switch b) Verify associated SPE lA(1B) Drn Vlv, in ISOL VLV OPEN position.
lGS043A(B) is closed.
Rev. 13a Page 15 of 24
CPS 3107.01 8.1.2.4 (Cont'd)
SPE/Cdsr lA, lGSOlSA SPE/Cdsr lB, lGSOlSB SPE Blower 1A1, lGSOlCA SPE Blower 1A2, lGSOlCB SPE Blower 1B1, 1GS02CA SPE Blower 1B2, 1GS02CB 0
0
- 5) Shut down previously running SPE Blower.
- 6) Adjust, as necessary, SPE Inlet Pressure to - 11" H20 vacuum (normal range is 10 - 14" H20) by locally operating SPE Blower Suct Isol Valve, 1 ~ ~ 6 0 4 ~ ~
(AB/BA/BB).
@=
See 4.6 PRECAUTION related to SPE vacuum.
- 7) Verify that level is being properly maintained by SPE Drain Level Controller lLIC-GS030(032).
Repeat step 8.1.2.4.2.41-6) as necessary.
- 8) Isolate previously running SPE/Cdsr as follows:
a) Place SPE lA(1B) Isol Vlv lGS-El(lGS-E2) switch in DRN VLV OPEN position.
b) Verify lGS-El(1GS-EZ) closes.
c) Verify 1GS043A(B) opens
- 9) Approximately 30 minutes to 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> after shutting SPE 1A(B) Isol Vlv, lGS-El(lGS-E2) condensate flow may be isolated from the non-running SPE Cdsr per CPS 3104.01, Condensate/Condensate Booster (CD/CB).
- 5. Running an Out Of Service Gland Seal Exhauster Blower lGSOlCA (1GSOlCB) (1GSOZCA) (1GS02CB)
- 1) Start the non running gland seal exhauster blower lGSOlCA (1GSOlCB) (1GS02CA) (1GS02CB).
- 2) Stop the blower started in Step 8.1.2.5.1.
- 3) Repeat Steps 8.1.2.5.1 and 8.1.2.5.2 for the other non running gland seal exhauster blowers as necessary.
Rev. 13a Page 16 of 24
CPS 3107.01
- W 8.1.3 NORMAL SHUTDOWN
- 1. Gland Steam Seal Evaporator
- 1) Ensure Auxiliary Steam or Main Steam is ready to supply the gland steam seal header.
- 2) -
IF Aux Steam is to be used, THEN Open 1GS041, Aux Stm Supply To Stm Seal Hdr Vlv.
- 3) -
IF Main Steam is to be used, THEN OpenlGS003, Mn Stm Supply To Stm Seal Hdr Vlv.
- 4) Slowly operate Aux Stm Supply To Stm Seal Hdr Byp, 1GS-S7 to obtain - 4 psig in steam seal header.
NOTE Perform the next two steps simultaneously to maintain steam seal header pressure.
- 5) Open Aux Stm Supply To Stm Seal Hdr Vlv, 1GS-S6.
- 6) -
IF While opening Aux Stm Supply To Stm Seal Hdr Vlv, 1GS-S6 the steam seal header pressure begins increasing, Operate Aux Stm Supply To Stm Seal Hdr Byp, 1GS-S7 to maintain - 4 psig until 1GS-S6 is fully open.
THEN
- 7) Slowly close Aux Stm Supply To Strn Seal Hdr Byp, 1GS-S7 while maintaining approximately 4 psig steam seal header pressure.
- 8) Close Evap Mn Stm Supply Vlv, 1GS-S8.
- 9) Locally, close Ext Stm To SSE Supp Vlv, 1GS057.
0 Verify Ext Stm Supp Line Drn Valve, 1GS058 opens.
- 10) Close Stm Supply Vlv, 1GS-S1.
- 12) To prevent draining the SSE and exposing it to Main Condenser vacuum, locally unlock and close the following:
Stm Seal Evap Blowdown Hdr Isol Vlv, 1GS046.
0 Stm Seal Evap Vent Vlv, 1GS047.
Rev. 13a Page 17 of 24
CPS 3107.01 8.1.3 (Contd)
- 2. Gland Seal System CAUTION Do not shutdown sealing steam with vacuum in the main condenser or turbine seal damage may occur.
Refer to CPS 3006.01, Unit Shutdown With Condenser to ensure plant requirements for a shutdown of Turbine Gland Sealing Steam are met.
IF steam seal header is being supplied by Aux or Kin Steam, THEN close the following:
Aux Stm Supply To Stm Seal Hdr Vlv, 1GS-S6, 0
Aux Stm Supply To Stm Seal Hdr Byp, 1GS-S7.
IF steam seal header is being supplied by Steam Seal Evaporator, THEN perform the following:
0 Close Stm Seal Supply Vlv, 1GS-S1.
0 Close Stm Seal Supply Byp Vlv 1GS-S2.
0 Shutdown Steam Seal Evaporator per step 8.1.3.1.
Verify the following are closed:
Mn Stm Supply To Stm Seal Hdr Vlv, 1GS003.
Aux Stm Supply To Stm Seal Hdr Vlv, 1GS041.
Stop the running SPE Blower.
Isolate both SPE/Cdsrs per the following:
a) Take switch SPE 1A Isol Vlv, 1GS-E1 to BOTH b) Take switch SPE 1B Isol Vlv, 1GS-E2 to BOTH c) Verify the following are closed:
CLOSE position.
CLOSE position.
0 SPE 1A Drn Vlv, 1GS043A.
0 SPE 1B Drn Vlv, 1GS043B.
Rev. 13a Page 18 of 24
ii 8.1.3.2 8.1.4 (Cont d)
CPS 3107.01 7 ) Approximately 30 minutes to 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> after closing SPE lA(1B) Is01 Vlv, lGS-El(lGS-E2) condensate flow may be shifted through the other non-running SPE Cdsr per CPS 3104.01, Condensate/Condensate Booster (CD/CB).
INFREQUENT OPERATION NOTE Two sources of steam are available to supply the Gland Steam Seal Header, AS and MS.
- 1. Operating Without the Gland Steam Seal Evaporator 0
- 1) Refer to 8.1.3.1 for switching steam supplies from Gland Steam Seal Evaporator to Aux Steam supply.
- 2) IF Auxiliary steam is not available, THEN:
a) b) Ensure steam does not blow to atmosphere from c) Verify at least one Steam Packing Exhauster Line up Main Steam supply by opening Mn Stm Supply To Stm Seal Hdr Vlv, 1GS003.
the glands.
Blower running.
d) Verify - 11 H20 vacuum exists at SPE inlet.
~5-See 4.6 PRECAUTION related to SPE vacuum.
NOTE It is expected that over the lifetime of the system the Main Turbine and Reactor Feed Pump Turbine Glands will wear. The Gland Steam Seal System has been designed to handle the extra steam flow required.
CAUTION Operate I GS-S7 and IGS-S2 slowly and in incremental steps, watching Steam Seal Header pressure closely.
- 2. Operating with Worn Glands
- 1) IF steam is being supplied by the Gland Steam Seal Evaporator, THEN operate Stm Seal Supply Byp Vlv, 1GS-S2 as necessary to maintain steam seal header pressure at - 4 psig.
Rev. 13a Page 19 of 24
CPS 3107.01 8.1.4.2 (Contd)
- 2) -
IF steam is being supplied by the Auxiliary or Main Steam Systems, -
THEN operate Aux Stm Supply To Stm Seal Hdr B y p, 1GS-S7 as necessary to maintain steam seal header pressure at - 4 psig.
3 ) -
IF Main Steam is supplying the SSE, -
THEN operate Evap Mn Stm Supply Byp Vlv, 1GS-ESFV-2 as necessary to maintain tube pressure in the SSE.
8.2 ABNORMAL PERFORMANCE 8.2.1 Abnormal Levels in the Gland Steam Seal Evaporator
- 1. Evaporator Shell Level Control
- 1) Low level IF shell level is low, -
THEN operate SSE Feedwater Bypass Vlv, 1GS-Sl0 as necessary to maintain level.
- 2)
SSE Fee&.vater Is0
- 3)
- 4)
High level NOTE vlv, 1 GSS9 will close on a High-Hig level of 4 inches (3.4 -6 inches.
IF shell level is high, -
THEN operate SSE Feedwater Is01 Vlv, 1GS-S9 as necessary to maintain level.
IF level in Gland Steam Seal Evaporator cannot be controlled, THEN shutdown Steam Seal Evaporator per step 8.1.3.1 and 8.1.4.1.
- 2. Evaporator Drain Level Control NOTE When Low Pressure Feedwater Heater 3B receives a High-High level, it trips closed the Evap Drn Cont Vlv, IGS007 from the Gland Steam Seal Evaporator to Feedwater Heater 3B. Level will be controlled by the Evap Emerg Drn Vlv, I GSOlO going to the Main Condenser.
- 1) -
IF SSE level is high or low, THEN operate the following as necessary to maintain level.
a) 1GS007, Evap Drn Cont Vlv b) 1GSO10, Evap Emerg Drn Cont Vlv IF level control system is malfunctioning and level cannot be maintained between high and low level alarms, THEN -
shutdown SSE per 8.1.3.1 and 8.1.4.1.
- 2)
Page 20 of 24 Rev. 13a
CPS 3107.01 8.2.2 Steam Packing Exhauster/Condenser Level Control NOTE The SPE/Cdsr drain line is equipped with 4 auxiliary drain line that drains to the Turbine BuiMing Equipment Drain system in the event that the n o m 1 level control system cannot muintain level.
Maintaining SPE/Cdsr drain level to high will cause annunciator 5019-3B(C), HIGH LEVEL STM PACKING EXH 2 (B y DRN PIPE to alarm and may result in unnecessary water being sent to the equipment drain system.
Ifevel in the SPE/G&r drain line is maintained too low, a condmer air inleakage path may be creatdfiom the equipment drain system to the condenser due to leakage through IGS022A@).
u
- 1. Adjust, as necessary, SPE Inlet Pressure to - 11 H20 vacuum (normal range is 10 - 14 H20) by locally operating SPE Blower Suct Isol Valve, 1 ~ ~ 6 0 4 ~ ~
(AB/BA/BB).
- See 4.6 PRECAUTION related to SPE vacuum.
- 2. Verify/place lLIC-GS030(032) tape setpoint at 0.
- 3. IF failure of the SPE Drain Level Controller is suspected, THEN take manual control of lLIC-GS030(032), and using the Open/Close pushbuttons, maintain level such that:
a) b) air inleakage from the SPE drain to the drainage to the equipment drain system from the SPE is minimized.
Main Condenser is minimized.
- 4. SPE/Cdsr lA(1B) Drn, 1GS024A(B) may be operated as necessary to assist in maintaining level.
5. -
IF air inleakage from the SPE drain to the Main Condenser is suspected, THEN fill the SPE drain line loop seal by opening 1GS020A(B), SPE Cdsr lA(1B) CY Sys Supp Isol, AND when Main Condenser air inleakage returns to normal, Shut 1GS020A(B).
- 6. -
IF level cannot be returned to normal AND/OR the SPE Drain Level Controller cannot be returned to Automatic, THEN switch to non-running SPE/Cdsr per step 8.1.2.4.
Rev. 13a Page 21 of 24
CPS 3107.01
.d' CAUTION To minimize pressure transients, operate pressure regulator bypass valves (IGS-S2, I GS-S7 and 1 GS-ESFV-2) slowly and in incremental steps, watching Steam Seal Header and/or SSE tube and shell pressure(s) closely.
- 1. -
IF Sealing steam pressure is lost AND cannot be promptly recovered, Trip main turbine and break condenser vacuum.
THEN IF Steam Seal Header is being supplied by the Gland Steam Seal Evaporator AND 1GS-SSFV, Stm Seal Hdr Press Control Vlv is unable to maintain pressure at - 4 psig, THEN :
- 2.
3.
Rev. 13a
- 4 psig.
- 2) If desired, shut lGS-Sl, Stm Seal Supply Vlv.
- 3) If evaporator supply pressure to steam seal header cannot be maintained, then shift to an alternate steam supply: refer to section 8.1.3.1.
IF Steam Seal Header is being supplied by the Auxiliary or Main Steam Systems AND 1GS-SSAFV, Main/Aux Stm To Stm Seal Hdr Press Control Vlv is unable to maintain pressure at - 4 psig, THEN:
- 1) Operate Aux Stm Supply To Stm Seal Hdr Byp, 1GS-S7 as necessary to maintain steam seal header pressure at - 4 psig.
- 2)
If desired,
- 3) -
IF Auxiliary Steam is being supplied shut lGS-SG, Aux Stm Supply To Stm Seal Hdr.
by the Electrode Boilers/Reboilers, Reboiler are operating properly.
THEN Ensure that the Electrode Boiler and
- 4. -
IF Main Steam is supplying the SSE AND 1GS-ESFV-1, Evap Mn Stm Supp Cont Vlv is unable to maintain SSE tube pressure between - 50 psig and 80 psig, -
THEN:
- 1) Operate Evap Mn Stm Supply Byp Vlv, 1GS-ESFV-2 as necessary to maintain tube pressure between - 50 psig and 80 psig.
- 2) If desired, shut 1GS-S8, Evap Mn Stm Supply Vlv.
Page 22 of 24
CPS 3107.01 9. 0 10.0 4,
i
'W' 11.0 11.1 11.2 11.3 11:4 ACCEPTANCE CRITERIA - None FINAL CONDITIONS - None REFERENCES G.E. STEAM TURBINE-GENERATOR K2804-0007 CPS 3208.01, Cycled/Makeup Condensate (CY/MC)
CPS 3214.01, Plant Air (IA & SA)
CPS 3502.01, 480V Distribution System 11.5 CPS 3104.01, Condensate/Condensate Booster (CD/CB) 11.6 CPS 3202.01, Operating Electrode Boilers And Reboilers 11.7 CPS 3113.01, Circulating Water (CW) 11.8 CPS 3006.01, Unit Shutdown With Condenser 11.9 USAR TBL 13.5-3 11.10 CPS 8801.12, Local Mounted Instrument Valve Operation And Venting 12.0 APPEND ICES 13.0 A. Power Operated Valve Location List DOCUMENTS CPS 3107.01V001, Turbine Gland Seal Valve Lineup CPS 3107.01V002, Turbine Gland Seal Instrument Valve Lineup CPS 3107.01E001, Turbine Gland Seal Electrical Lineup Rev. 13a Page 23 of 24
CPS 3107.01 Power Operated Valve Location List MOTOR OPERATED VALVES 1GS-SG Aux Stm Supply to Stm Seal Hdr Vlv 1GS-S7 Aux Stm Supply to Stm Seal Hdr Byp 1GS-003 Mn Stm Supply to Stm Seal Hdr Vlv 1GS-041 jAux Stm Supply to Stm Seal Hdr Vlv APPENDIX A:
ii TB 781: Room East of SSE Room 1GS-ESFV-2 Evap Mn Stm Supply Bypass Vlv 1GS-S8 Evap Mn Stm Supply Vlv TB-781: SSE Room 1GS-S1 Stm Seal Supply Vlv 1GS-S2 Stm Seal Supply Bypass Vlv 1GS-E1 SPE 1A Isol Vlv TB 781: Mezz South of SSE Room TB 781: SPE Rm 1A 1GS-E2 SPE 1A Isol Vlv TB 781: SPE Rm 1B 1GS-S9 SSE Feedwater Isol Vlv 1GS-Sl0 SSE Feedwater Bypass Vlv TB 762: South of LP Htr 3B CONTROL VALVES SSE Supp from MS Ext Stm Feed to SSE Ext Stm Feed to SSE Ext Stm Drn Valve 1GS-ESFV-1 1GS-001 1GS-002 1GS-042 TB 781: SSE Room Stm Seal Hdr from MS Ext Stm Supp Line Drn 1GS - SSAFV 1GS-058 TB 781: Room East of SSE Room Stm Pk Exh 1B Drn Lvl Vlv 1GS - 0 2 2B TB 762: 40 ft. up on the South Side of G-108 Stm Pk Exh 1A Drn Lvl Vlv 1GS-022A TB 762: 40 ft. up on the North Side of G-108 SSE Drn Tank Emerg Lvl Vlv 1GS-010 TB 762: At J-108 East side of Flash Tank 1B SSE Feed from CB SSE Drn Tnk Norm Lvl Vlv 1GS-EWFV 1GS-007 TB 762: South of LP Htr 3B SSE Outlet Cont Vlv 1GS-SSFV TB 781: Mezz South of SSE Room SPE 1A Drn Vlv SPE 1B Drn Vlv 1GS - 04 3A 1GS- 04 3B TB 781: SPE Room 1A TB 781: SPE Room 1B Page 24 of 24 Rev. 13a
CPS 3112.01 CONDENSER VACUUM (CA)
~~
~
SCOPE OF REVISION:
'ii ClR08: Incorporated EC 332064 (EPU-TO507 AT1 52839-06-29):
new ORM OR 2.2.16 MSLRM Prerequisite.
Incorporated EC 335251: OCA012A/B operation description enhancements.
0 Specific Rev. 17a [Landin] : EDITORIAL -
Incorporated CR 130048-04 verification check of OCY152A(B) valves shut on shutdown due to potential for vibration induced movement.
0 Specific Rev. 17b [Sheffield] : EDITORIAL -
Developed a stand alone attachment (3112.01POOl) for Emergency/Post SCRAM Vacuum Pump Startup.
0 Specific Rev 17c [Bartsch} : EDITORIAL -
Separated out multiple steps. Re worded sections to eliminate vague direction.
0 Specific rev. 17d - [Sheffield]: - CR 163899-05: - [Editorial]:
Added to notify Radiation Protection to perform survey of the pump area after Vacuum pump startup.
ORIGINATOR : Thomas J. Landin CLASS CODE : NNND SQR: Doug Hunter APPROVAL DATE : JAN 29 2002 CURRENT CHANGES TO GENERAL REVZSION C h a n g e #
D a t e List of A f f e c t e d P a g e s 0
17a 12130102 1, 10, 12 Q
17b 02/08/03 1,6, 14 0
17c 04130103 1, 6, 8, 13, 14. 15
+-
0 17d 08127103 1, IO, 14 Rev. 17d Page 1 of 16
CPS 3112.01 W
8.0 8.1 8.1.1 8.1.2 8.1.3 8.2 8.2.1 8.2.2 8.2.3 8.3 8.3.1 PROCEDURE TABLE OF CONTENTS (Section 8.0 only)
NORMAL OPERATION Vacuum Pump Startup Routine Operation Vacuum Pump Shutdown INFREQUENT OPERATION Breaking Vacuum Weekly Jog of Condenser Vacuum Pump(s)
Measurement of Condenser Air In Leakage ABNORMAL OPERATION Seal Water Heat Exchanger High Temperature Rev. 17d Page t
10
, 10 Page 2 of 16 12 13 15 15
CPS 3112.01 1.0 PURPOSE To provide instructions for placing Condenser Vacuum (CA)
System in its normal operational modes and to provide corrective action in case of abnormal operation.
u 2.0 DISCUSSION/DEFINITIONS 2.1 Discussion 2.1.1 The purpose of the CA System is to:
- 1. Evacuate the condenser, turbine, extraction steam piping, moisture separator reheaters, and feedwater heaters from unit startup through normal unit operation.
- 2. Remove non-condensable gases (including air in-leakage and disassociation products from the reactor) from the condenser and discharge the gases through the plant vent stack or to the off-gas system.
2.1.2 When necessary, this system provides an air path to the condenser to break vacuum and slow the turbine quickly when shutting down the unit in an emergency.
2.2 Definitions 2.2.1 AMBIENT TEMPERATURE: The motor is at equilibrium
.iJ temperature with its environment.
2.2.2 LARGE MOTOR: Motors powered from 6.9KV or 4.16KV busses.
2.2.3 2.2.4 3.0 4.0 4.1 4.2 i j OPERATING TEMPERATURE: The maximum steady state temperature of the motor windings.
This temperature is reached after the motor is running at operating speed for 15 minutes.
START: The motor has come up to operating speed.
RESPONSIBILITY Operations Department Head is responsible for ensuring the proper implementation of this procedure.
PRECAUTIONS Running mechanical vacuum pumps at power may be a radiological and hydrogen hazard.
Do not take suction on the main condenser with the mechanical vacuum pumps > 5% Rx power.
Rev. 17d Page 3 of 16
CPS 3112.01 4.0 PRECAUTIONS (cont d) 4.3 During startup of the CA system, the mechanical vacuum pumps should not be started until gland sealing steam is applied to prevent drawing air across the turbine seals except as provided for in CPS 3112.01C001, Drawing Vacuum Without CW and/or GS Checklist.
d 4.4 During shutdown, if gland sealing steam is lost, condenser vacuum must be broken immediately to prevent drawing cool air across the seals.
NOTE Unless otherwise stated, in operation, energized, in service, etc. refers to those portions of the system required to support the plant condition as defined in the operating procedure.
5. 0 PREREQUISITES 5.1 To preclude drawing a vacuum in the Rx vessel with Reactor pressure e 50 psig, the following systems may have to be isolated from the Reactor.
Main Steam (MS, IS & ADS)
Main Steam Drains Off-gas Recombiner Preheater
- i/
5.2 Prior to drawing vacuum in the main condenser with the mechanical vacuum pump, verify:
- 1. RP notified that Mechanical Vacuum Pumps will be run.
- 2. Following lineups complete:
- 1) CPS 3112.01E001, Condenser Vacuum Electrical Lineup
- 2) CPS 3112.01V001, Condenser Vacuum Valve Lineup
- 3) CPS 3112.01V002, Condenser Vacuum Instrument Valve Lineup
- 3. Following system in operation to support CA:
- 1) CPS 3107.01, Turbine Gland Seal ( G S ),
except as provided for in CPS 3112.01C001, Drawing Vacuum without CW and/or GS Checklist.
except as provided for in CPS 3112.01C001, Drawing Vacuum Without CW and/or GS Checklist.
- 3) CPS 3204.01, Turbine Building Closed Cooling Water
- 4) CPS 3208.01, Cycled/Makeup Condensate (CY/MC)
- 6) CPS 3501.01, High Voltage Auxiliary Power System
-o 5.3 Verify Main Steam Line Radiation Monitoring Instrumentation is OPERABLE per O W OR 2.2.16, MSLRM.
Rev. 17d Page 4 of 16
6.0 CPS 3112.01 LIMITATIONS 6.1 ti 6.2 6.3 6.4 6.5 7.0 Do not open 1CA007, Vacuum Breaker Valve unless turbine speed is e 1200 rpm, except in the case of the following Main Turbine emergencies, at which time vacuum is broken immediately.
Loss of main turbine lube oil.
0 Loss of gland sealing steam.
0 High main turbine vibration.
Ensure that a continuous supply of seal water is present while operating the Mechanical Vacuum Pumps.
Notify MCR prior to switching from the SJAE/Recombiner Trains to the Vacuum Pumps or vice versa so that the proper Process Radiation Monitor (PRM) may be placed in service.
With sealing steam applied to the main turbine, ensure that 1CA007, Condenser Vacuum Breaker Valve is maintained open until a vacuum pump is started to preclude overpressurizing the main condenser.
Vacuum Pump Motor Restart Requirements:
- 1. With the windings at ambient temperature, the motor can be started and brought to speed 2 times in succession, coasting to rest between stops.
2.
With the windings at operating temperature, the motor can be started and brought to speed once.
3.
If the motor has been started once from operating temperature, restart may be attempted after the following time constraints.
The motor windings can be assumed to have returned to operating temperature after 60 minutes unenergized or after 30 minutes running at operating speed.
More frequent starts may cause damage to motor windings.
Consult the technical manual or the motor supplier.
MATERIALS/TEST EQUIPMENT Lengths of tygon tube approx. 15' each, or other suitable material (used in CPS 3112.01C001, Drawing Vacuum Without CW and/or GS Checklist)
Rev. 17d Page 5 of 16
CPS 3112.01 8.0 PROCEDURE 8.1 NORMAL OPERATION CAUTION Do not take suction on the main condenser with the mechanical vacuum pumps > 5% Rxpower.
Do not run mechanical vacuum pumps when Off Gas System is shut down, unless a positive purge airflow has been established to preclude reverse flow.
Ensure Charcoal Absorbers are bypassed prior to initiating airflow through the OG System. ttCM-1))
NOTE One vacuum pump will maintain 25 Hg vac.
NOTE Ifperforming a vacuum pump start up following a SCRAMproceed to 31 12. OlPOOI for Emergency/Post SCRAM Startup of a Vacuum Pump.
8.1.1 Vacuum Pump Startue NOTE With IN66-FO60 shut or the SJAE in service reverseflow will not occur through the OG System
+.d 0
- 1) Contact MCR to ensure monitors are in service on Off-Gas prior to initiating air flow in the Off-Gas System.
a) Verify Off-Gas System lined up for startup per CPS 3215.01, Off Gas (OG).
b) Establish purge air flow by throttling open 1N66-F004A(B), OG Purge Air Valve until OG Stream Flow Recorder, 1N66-R620 indicates 30 scfm. (tCM-I>)
- 3) Monitor 1N66-R620 during vacuum pump startup and operation.
- 4) Adjust lN66-F004A(B) as necessary to maintain a positive purge air flow.
Rev. 17d Page 6 of 16
CPS 3112.01 8.1.1 Vacuum Pump Startup (cont'd) ii NOTE Steps 8. I. 1.2 through 8.1.1.7 may be done in any order.
- 2. IF Starting vacuum pump following a Reactor Scram or plant shutdown, THEN Perform/verify Off-Gas System is shutdown per CPS 3215.01, Off Gas (OG).
- 3. Establish a cooling water flow path to Vacuum Pump, OCAOlPA(B) per CPS 3204.01, Turbine Building Closed Cooling Water.
- 4. (Local)
Check Condenser Vacuum Separator Tank, OCAOlTA(B) water level, midway in sightglass, if not fill per 8.1.1.10.
Open OCA014A(B), Sep Tank A(B) Loop Seal Fill for 30 seconds to fill the Loop Seal drain line.
- 5. (Local) Start Seal Water Pump A(B), OCA02PA(B).
- 1) Allow seal water pump to run for 5 minutes prior to starting vacuum pump.
- 2)
Verify seal water pressure is > 20 psig as read on OPI-CAOll(O12). ac~-2, IF Seal water pressure is low, THEN Vent the seal water pump by opening, venting and closing OCAGOlA(B),
Seal Water Pump A(B) Vent.
Rev. 17d Page 7 of 16
CPS 3112.01 8.1.1 Vacuum Pump Startup (contd)
NOTE Proper oil level is extremely important. Ifthe pump is allowed to run with too low an oil level, poor distribution and lack ofproper lubrication will result. A high oil level will result in churning, which will generate excessive heat and foaming, thus reducing oil life.
Normal operating oil level for vacuum pump outboard bearing should be at the top of the red indicating line on the bearing housing oil sightglass. The level may rise above the red line with the vacuum pump shutdown.
Normal standby oil level for vacuum pump gear housing should be at the top of the red indicating line on the gear housing oil sightglass. The level may rise above the red and white indicating lines with the vacuum pump operating. Do @ drain out any oil when this occurs.
Experience shows that oil level will rise approximately 3/8 after pump starts Motor oil level should be slightly above the center of the sightglass.
- 6. (Local) Verify normal oil levels in the following per above NOTE criteria:
- 1) Vacuum pump bearing housing,
- 2) Gear housing oil sight glasses and 3 ) Motor oil sight glass
- 7. Contact MCR prior to starting the Vacuum Pump to verify radiation monitors are in service.
i j
- 8. Open 1CA003, Vac Pump Suction Vlv.
NOTE OHS-CAO3OA(B) is a spring return switch for the OCAOO6A(B), Separator A(B) Discharge Valve, and must be held in the 0PENposition until Vac Pump is started.
- 9. (Local) Open OCAOOGA(B) Separator A(B) Discharge Valve by holding C/S in OPEN position until OCAOlPA(B) is started.
(MCR) Verify OCAOOGA(B) indicates full open.
II CAUTION 11 Do @ stand close to separator tank loop seal as water will splash when vacuum pump is started.
11
- 10. Start Vac Pump, OCAOlPA(B).
- 11. (Local)
Open OCY152A(B), Separator Tank A(B) Startup Fill Valve to raise water level in separator tank.
Shut OCY152A(B) when water level reaches the middle of separator tank sight glass.
Rev. 17d Page 8 of 16
CPS 3112.01 8.1.1 Vacuum Pump Startup (contd)
.>d
- 12. (Local) Verify normal oil level in vacuum pump bearing housing oil sightglass per 8.1.1.5 NOTE criteria.
NOTE Steps 8. I. 1. I3 through 8. I. I. I5 may be N/A d if not required to support plant operation.
- 13. Shut 1CA007, Condenser Vacuum Breaker Valve.
NOTE The vacuum breaker loop seal level indicator ILI-CAOO5 will be used only when loop seal water level is to be veriJied locally.
During normal operation the level indicator remains isolated by having its isolation valve 1 CAOl I shut. This prevents damage to the level indicator in case vacuum breaker is opened.
ti
- 14. (I&C)
Fill and vent vacuum breaker loop seal level indicator 1LI-CA005 sensing lines per CPS 8801.12, Local Mounted Instrument Valve Operation and Venting. C C M - ~,
- 15. (Local) Fill Vacuum Breaker Loop Seal by:
- 1) Open 1CAO11, Level Indicating Valve.
as indicated on Level Indicator, 1LI-CA005.
3 )
Shut 1CA009.
- 4) Shut 1CAO11.
- 16. If two vacuum pump operations are desired:
- 1) Ensure sufficient cooling water is available per CPS 3204.01, Turbine Building Closed Cooling Water.
- 2) Start second vacuum pump by repeating steps 8.1.1.3 through 8.1.1.14 (exclude 8.1.1.6 and 8.1.1.7).
Rev. 17d Page 9 of 16
CPS 3112.01 8.1.1 Vacuum Pump Startup (cont'd) 0 NOTE OCAO12A(B), Seal Water A@) Orifice Bypass Valve will open at a vacuum pump suction vacuum of 20 in. HG vac or greater, and will shut at I7 in. HG vac or lower to supply additional seal water to the vacuum pumps.
&d 0
- 17.
- 18.
0
- 19.
(Local) At 20" Hg vac or greater, verify OCAOi2A(B),
Seal Water A(B) Orifice Bypass Valve opens.
Shut 1TD018, Seal Leakoff Tank Level Regulator Bypass Valve.
Notify Radiation Protection to perform survey of the Vacuum pump area after Vacuum pump startup for possible contamination.
8.1.2 Routine Operation To shift vacuum pumps,
- 1. Start the desired Vacuum Pump, OCAOlPA(B) per steps 8.1.1.2 through 8.1.1.11 (exclude 8.1.1.6 and 8.1.1.7).
- 2.
Secure the other vacuum pump per step 8.1.3.2.
CAUTION Do not attempt to operate a SJAE < 2OOpsig MS supply pressure due to IB21-F437(A)B, SJAE Steam Inlet Control Valve Bypass being gagged shut.
8.1.3 Vacuum Pump Shutdown
- 1. If plant startup is in progress, coordinate this section with CPS 3215.01, Off Gas ( O G ).
- 2. IF both vacuum pumps are operating, AND only one is to be shutdown:
THEN
- 1) Stop the desired Vacuum Pump, OCAOlPA(B).
- 2) (Locally or MCR) Verify shut OCAOOGA(B),
Separator A (B) Discharge Valve.
'*4' Rev. 17d
- 3) (Local) Stop Seal Water Pump OCA02PB(A).
- 4) Realign WT for single vacuum pump operation per CPS 3204.01, Turbine Building Closed Cooling Water.
Page 10 of 16
CPS 3112.01 8.1.3 Vacuum Pump Shutdown (cont'd)
- 3. IF both vacuum pumps are to be shutdown, OR
-4 only one is running and is to be shutdown:
THEN
- 1) Shut 1CA003, Condenser Vacuum Pump Combined Suction Isolation Valve.
- 2) Stop Vacuum Pump(s) OCAOlPB(A).
0 0
- 3) Shut OG Purge Air Valve 1N66-F004A(B),
unless required by CPS 3215.01, Off-Gas (OG).
- 4) (Local or MCR) Verify shut OCAOOGB(A),
Separator A(B) Discharge Valve.
- 5) (Local) Stop Seal Water Pump OCA02PB(A).
- 6) Verify shut OCY152A(B),
Separator Tank A(B) Startup Fill Valve.
- Valve is prone to vibration induced opening.
7 ) Notify RP after vacuum pumps shutdown.
- 8) Secure the cooling water flow path to Vacuum Pump OCAOlPA(B) per CPS 3204.01, Turbine Building Closed Cooling Water.
Rev. 17d Page 11 of 16
CPS 3112.01 8.2 INFREQUENT OPERATION ti CAUTION The following events occur when vacuum is broken:
0 Main Turbine Trip:
21.6 Hg vac 0
Rx Feed Pump Turbine Trip:
18.5 Hg vac Group I Isolation:
8.5 Hg vac 0
Bypass Valve Inhibit:
7.5 Hg vac 8.2.1 Breaking Vacuum
- 1. IF Breaking vacuum for a Main Turbine emergeqcy, THEN:
- 2) Trip the Main Turbine,
- 3) Open 1CA007, Condenser Vacuum Breaker Valve.
- 4) Monitor for lowering vacuum.
- 2. Ensure plant conditions are suitable for breaking vacuum per CPS 3006.01, Unit Shutdown.
NOTE The following step allows Inboard MSWs to remain open when breaking vacuum as provided by CPS 3101.01 (MS, IS & ADS) for MSL Shutdown.
- 3. IF Desired to keep MSIVs open, and the MODE switch is in SHUTDOWN with Main Turbine Stop Valves shut, Bypass Switches on 1H13-P601 to BYPASS.
THEN Place the Div 1, 2, 3 & 4 Cond Low Vacuum NOTE The following step prevents the RFP Seal Tank from overflowing when vacuum is broken.
4.
- 5.
6.
- 7.
Open 1TD018, Seal Leakoff Tank Level Regulator Bypass Valve.
Open 1CA007, Condenser Vacuum Breaker Valve, and monitor for lowering vacuum.
If it is desirable to ventilate the Main Condenser, leave 1CA007 open and refer to step 8.1.1.1 thru 8.1.1.11 for starting the mechanical vacuum pump.
When ventilation is no longer desired, stop the mechanical vacuum pumps per 8.1.3.
Page 12 of 16
CPS 3112.01 8.2.2 Weekly Jog of Condenser Vacuum Pump(s)
- 1. (MCR)
Shut/verify shut 1CA003, Condenser Vac Pump Combined Suction Vlv
- 2. Start Seal Water Pump A(B), OCA02PA(B).
G-Allow seal water pump to run for 5 minutes prior to starting vacuum pump.
- 3. Verify seal water pressure is > 2 0 psig as read on OPI-CAOll(O12). ~ c ~ f - 3,
IF Seal water pressure is low, THEN Vent seal water pump by opening, venting and closing OCAGOlA(B), Seal Water Pump A(B) Vent.
NOTE Proper oil level is extremely important. Ifthepump is allowed to run with too low an oil level, poor distribution and lack ofproper lubrication will result. A high oil level will result in churning, which will generate excessive heat and foaming, thus reducing oil life.
Normal operating oil level for vacuum pump outboard bearing should be at the top of the red indicating line on the bearing housing oil sightglass. The level may rise above the red line with the vacuum pump shutdown.
Normal standby oil level for vacuum pump gear housing should be at the top of the red indicating line on the gear housing oil sightglass. The level may rise above the red and white indicating lines with the vacuum pump operating. Do not drain out any oil when this occurs.
Experience shows that oil level will rise approximately 3/8 after pump starts Motor oil level should be slightly above the center of the sightglass.
+u
- 4. (Local) Verify normal oil levels in the following per above NOTE criteria:
- 1) Vacuum pump bearing housing,
2 ) Gear housing oil sight glasses and
- 3) Motor oil sight glass
- 5. Contact MCR prior to starting vacuum pump to verify radiation monitors are in service.
NOTE OHS-CAO3OA(B) is a spring return switch for the OCAOO6A(B), Separator A(B) Discharge Valve, and must be held in the 0PENposition until Vac Pump is started.
- 6. (Local) Open OCAOOGA(B) Separator A(B) Discharge Valve by holding C/S in OPEN position until OCAOlPA(B) is started.
-4 (MCR) Verify OCAOOGA(B) indicates full open.
Rev. 17d Page 13 of 16
CPS 3112.01 8.2.2 Weekly Jog of Condenser Vacuum Pump(s) (contd)
CAUTION Do not stand close to separator tank loop seal as water will splash when vacuum pump is started.
Ij
- 7. Start Vac Pump, OCAOlPA(B), and run,for - 30 secs.
0 0
0 NOTE Proper oil level is extremely important. Ifthe pump is allowed to run with too low an oil level, poor distribution and lack ofproper lubrication will result. A high oil level will result in churning, which will generate excessive heat and foaming, thus reducing oil life.
Normal operating oil level for vacuum pump should be at the top of the red indicating line on the bearing housing oil sightglass. The level may rise above the red line with the vacuum pump shutdown.
Normal standby oil level for vacuum pump gear housine should be at the top of the red indicating line on the gear housing oil sightglass. The level may rise above the red and white indicating lines with the vacuum pump operating. Do not drain out any oil when this occurs.
Experience shows that oil level will rise approximately 3/8 after pump starts Motor oil level should be slightly above the center of the sightglass.
- 8.
- 9.
- 10.
- 11.
- 12.
13 (Local) Verify normal oil levels in the following per above NOTE criteria:
- 1) Vacuum pump bearing housing,
- 2) Gear housing oil sight glasses and
- 3) Motor oil sight glass Stop Vac Pump, OCAOlPA(B).
(Local or MCR) Verify shut OCAOOGA(B),
Separator A (B) Discharge Valve.
Stop Seal Water Pump, OCA02PA(B).
Verify shut OCY152A(B),
Separator Tank A(B) Startup Fill Valve.
G F Valve is prone to vibration induced opening.
Notify Radiation Protection to perform survey of the Vacuum pump area after Vacuum pump startup for possible contamination.
Rev. 17d Page 14 of 16
CPS 3112.01 8.2.3 Measurement of Condenser Air In Leakage
- 1. (Local) Open both of the following Condenser Vacuum Pump Combined Suction Isolation Test Connection Isolations. (TB 762, K-115.1) :
- 1) 1CA019A
- 2) 1CA019B
- 2. Shut 1CA003, Cdsr Vac Pump Combined Suction Isol.
- 3. Monitor Condenser Vacuum.
IF Rapid lowering in vacuum is noted, THEN Reopen 1CA003.
- 4. Obtain flow readings as desired.
- 5. Upon completion of measurement:
- 1) Open 1CA003.
- 2) (Local) Shut 1CA019A.
- 3) (Local) Shut 1CA019B.
L--f 8.3 ABNORMAL OPERATION NOTE OCAO12A(B), Seal Water A(B) OriJice Bypass Valve will open at a vacuum pump suction vacuum of 20 in. HG vac or greater, and will shut at I7 in. HG vac or lower to supply additional seal water to the vacuum pumps.
8.3.1 Seal Water Heat Exchanger High Temperature
- 1. (Local) Check OCA012A(B), Seal Water A(B) Orifice Bypass Valve for proper operation.
- 2. IF Cooling Water supply is lost to the vacuum pump seal water heat exchanger, Turbine Building Closed Cooling Water.
THEN Refer to CPS 3204.01, t
i
-u Rev. 17d Page 15 of 16
CPS 3112.01 ij.
0 9.0 ACCEPTANCE CRITERIA - None 10.0 FINAL CONDITIONS - None
11.0 REFERENCES
11.1 Licensing Basis Documents 11.1.1 ORM OR 2.2.16, MSLRM 11.2 11.2.1 11.2.2 11.2.3 11.2.4 11.2.5 11.2.6 11.2.7 11.2.8 11.2.9 11.2.10 Procedures CPS 3006.01, CPS 3101.01, CPS 3104.01, CPS 3107.01, CPS 3113.01, CPS 3204.01, CPS 3208.01, CPS 3214.01, CPS 3215.01, CPS 3501.01, Unit Shutdown Main Steam (MS, IS & ADS)
Condensate/Condensate Booster (CD/CB)
Turbine Gland Seal (GS)
Circulating Water (CW)
Turbine Building Closed Cooling Water Cycled/Makeup Condensate (CY/MC)
Off Gas (OG)
High Voltage Auxiliary Power System 11.3 Design/Vendor/Print/Other 11.3.1 CA Pump Technical Manual K2852-0004 11.4 Commitments 11.4.1 CM-I: CR1-92-05-059: Charcoal Bed Fire Concerns
<<8.1.1.1 CAUTION, 8.1.1.12, 11.4.2 CM-2: CR1-97-07-040: 1LI-CAOO5 Flush/Vent
~ 8. 1. 1. 1 3 ~
11.4.3 CM-3: CR1-98-12-113: Seal Pressure ~8.1.1.4.2, 8.2.2.32, 12.0 APPENDICES - None 13.0 DOCUMENTS CPS 3112.01E001, Condenser Vacuum Electrical Lineup CPS 3112.01V001, Condenser Vacuum Valve Lineup CPS 3112.01V002, Condenser Vacuum Instrument Valve Lineup
- *Q Rev. 17d CPS 3112.01C001, Drawing Vacuum Without CW and/or GS Checklist CPS 3112.01P001, Emergency/Post SCRAM Startup of a Vacuum Pump.
Page 16 of 16