ML20009D189
| ML20009D189 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 07/10/1981 |
| From: | LONG ISLAND LIGHTING CO. |
| To: | |
| Shared Package | |
| ML20009D181 | List: |
| References | |
| 29.032.05-DRFT, NUDOCS 8107230265 | |
| Download: ML20009D189 (6) | |
Text
{{#Wiki_filter:Subnf.t ted: SP Number 29.023.05 (Section liead) Revision: C Approved: (Plant Manager) Effective Date [$El II E c' b) U Q fu u lh j y'gg RAPID RPV DEPRESSURIZATION , g EMERGENCY PROCEDURE l 1.0 PURPOSE The purpos,e of this procedure is to rapidly depressurize the RPV to allow injection systems to inject and restore RPV water level to an acceptable level above TAF. 2.0 ENTRY CONDITIONS Thic. Trocedure is entered from the following Emergency Procedures: 2.1 SP29.023.03 (Containment Control) when: 2.1.1 Suppression Pool terperature and RPV pressure cannot; be maintained below the heat capacity temperature limit. 2.1.2 Drywell temperature near the cold reference leg instrunent vertical runs has increased to the RPV saturation licit. 2.1.3 Drywell temperature cannot be maintained below 296*F. 2.1.4 Suppression Pool Water Level cannot be maintained above the heat capacity level limit. 2.2 SP29.023.@4 (Level Pastoration) when: 2.2.1 RPV water level cannot be determined and at least one nore41 injection or alternate injection subsystem is lined up with at least one pump running. 2.2.2 RPV water level is increasing, RPV pressure is between 100'psig and 333 psig and is increasing, HPCI and RCIC are not available.
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2.2.3 RPV water laval is increasing, RPV prassure is less then 100 psig
~ and RPV prassure is increasing.
a 2.2.4L RPV water level is decreasing, RPV pressure is greater than 333
! psig, CRD is not operating and at least two. injection subsystems i'
are lined up for injection with pumps running.
-2.2.5 RPV water level is decreasing, RPV pressure is less than 333 psig, any injecion or ritornate injection subsystem is lined up with pumps running anc.' RPV pressure is increasing.
2.2.6 RPV water level is decreasing, RPV pressure is greater than 333
- psig and low pressure injection subsystems or Alternate Injection Subsystems are lined up for injection with at least one pump running.-
[ .. 3.0- OPERATOR ACTION
- 3.1' Lopen all ADS valves by manually opening each of the individual valves.
CAUTION Do not depressurize the RPV below 190 psig (HPCI low pressure isolation setpoint) unless' motor driven pumps sufficient to
' -. maintain RPV water level are running and available for injection.
CAUTION
- Observe NPSH requirements for p.unp.s taking a suction from the Suppression Pool.
Suppre sion Pool Pumps Maximum Temperature Minimum Level
.~~-~,
HPCI (Later) (Later) f CS (Later) (Later) RHR (Later) (Later) RCIC (Later) (Later)-
- l. -
CAUTION l~ l - Cooldown ratessgreater than'100*F/hr may be ;
- l. required to accomplish this step.
L I, SP29.M . 95 ,Rev. C l
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- 23.2 If n:t all ADS v;1vas can ba'epin:d, opan othar SRV's until 7 valvas era cptn.
3.3 . If less than (later) SRV's can be opened, rapidly depressurize the RPV using one or more of the following systems: CAUTION i Defeating isolation interlocks may be required to complete this step. Use in the order which will minimize radioactive release to the environment. (A) Main Condenser Available (1) Main Turbine Bypass Valves (Preferred Method) per SP 22 995.91, Shutdown to Cold Shutdown. (2) RCIC per SP 23.119.91, Reactor Core Isolation Cooling (RCIC) System. (3) HPCI per SP 23.292 91, High Pressure Coolant Injection. (4) RHR (Steam Condensing Mode) per SP 23.121 91, -
. Residual Heat Removal (RRR) System.
(5) Other Steam Driven Equipment p (1) Steam Jet Air Ejectors per SP 23.791.91, Condenser Of f-Gas Removal. , (2) RFFTS per SP 23.199.91, Feedwater System __ (3) Steam Seal Evaporator per SP 23.124 91, Steam Sealing (4) Main Condenser Deaerating Steam per SP 23.193 91, Condensate
- _ _ .. _(5) RPV Head Ve it (6) Main Steam Line Drains per SP 23.116 91, Main and Auxiliary Steam (7) RWCU (Blowdown Mode) per SP 23.791 91, Reactor Water Cleanup System t
SP29.923 95 Rev. C -
/ / Page 3 N
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3.41 If cupprsssien chambar praneurs cannot b2 maintaintd below the prsecura supprsasion limit, (Fig. 1), prcceed to SP29 923.99 (RPV Flooding). 3.5 If RPV water level cannot be determined, enter SP29 923.99 (RPV-Flooding). i 3.6 If temperature near the cold reference leg instrument, vertical runs reaches the RPV saturation limit as determined from Figure 2, proceed to SP29 923 99_(RPV Flooding). 3.7 Proceed to SP29.923 91 (Level control) Step L 3 49 REFERENCES
-4.1 SP 29.923.93 Containment Control 4.2 .SP 29 923 94 Level Restoration 4.3' SP 29 923.99 RPV Flooding 4.4 SP 22 995 91 Shutdown to Cold ib.utdown 4.5 SP 23.119.91 Reactor Core Isolation Cooling (RCIC) System 4.6 SP 23.292 91 High Pressure Coolant Injection ,
4.7 SP 23.121.91 Residual Heat Removal'(RHR) System 4.8 SP 23.791 91 Condenser Off Gas Renoval
- 4. 9. SP 23.124.91 Steam Sealing 4.19 SP 23.193.91 Condensate 4.11 SP 23.199.91 Feedwater System 4.12 SP 23'799.91
. - Reactor Water Cleanup System
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