ML20129J008

Special Rept:On 850227,0301,0403,06,09 & 12,during Startup Testing,Rcic Sys Actuations & Injections Into RCS Occurred. No Corrective Action Required

ML20129J008
Person / Time
Site:	Limerick
Issue date:	05/24/1985
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
CON-#285-253 NUDOCS 8506070714
Download: ML20129J008 (5)

Text

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' PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET .

P.O. BOX 8699 PHILADELPHIA. PA.19101 m (2151841-4000 May 24, 1985 Docket No. 50-352 Dr. 'Th'omas Ei Murley ._ . _

. Office _of Inspection and Enforcement U. S. Nuclear Regulatory. Commission

-: Region I 631-Park Avenue King of-Prussia, PA 19406

SUBJECT:

Special Report - Reactor Core Isolation Cooling (RCIC)

System Actuations and Injections - Limerick Generating Station - Unit 1

REFERENCE:

Technical Specifications 3.7.3.b and 6.9.2 Dea'r Dr.'Murley:

This Special Report is being_ submitted pursuant to the requirements of Limerick Generating Station Technical Specification'3.7.3.b which states that, "In the event the RCIC systemtis actuated.and. injects water into the reactor._ coolant

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system,_ a Special Report shall be prepared and submitted to the-Commission pursuant to Specification 6.9.2 within 90 days describing the circumstances of.the actuation and the total

. accumulated actuation cycles'to_date.", and Technical Specification 6.9.2 which states that, "Special Pep rts.shall be submitted to_the Regional Administrator of the Reg.onal Office of the NRC'within the time' period specified for each report."

This report concerns the_ occurrence of seve'n Reactor L Core Isolation Cooling (RCIC) system actuations and injections

~into the reactor coolant system during startup testing of Unit

'No.'l. None of the seven RCIC vessel-injections were unanticipated nor the. result of' safety system action from abnormal plant conditions, but were performed under the purview of.the startup test program andLdirected by Startup Test Procedures. -Since these injections were designed into the

'startup test program, there were'no adverse effects on the A 2 8 pm gQ

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-Dr. Thomas E. Murley May 24, 1985 Page 2 reactor' vessel or.the RCIC system as a result of the injections.

Two injections were automatic quick starts at less than 3% rated power with the dome pressure at approximately 150 psig. The five remaining injections occurred at less than 4% rated power with the dome: pressure at 920 psig. Four were automatic quick starts l and one was a manual slow start.

Below is a description of'each of the RCIC system

' actuation and injection events.

On February 27, 1985 Startup Test Procedure (STP)Ll4.4-  !

1,'"RCIC Controller Optimization 1 During RPV Injection at Rated

' Pressure", was. performed. The test involved two intentional RCIC  !

injections into the reactor vessel. The first injection

. consisted of a RCIC slow start in manual mode, with flow step changes up to 600 gpm to optimize. controller settings. The

~second injection consisted of a RCIC quick start in automatic mode to a flowrate of 600 gpm with the same controller settings

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from the first-injection to check control system stability.

. Reactor parameters for both injections were as follows:

Powerclevel less than 4% of rated, dome pressure 920 psig, and

. moderator temperature 520 degrees F. RCIC pump suction for both injections was lined up to the Condensate: Storage Tank (CST) and pump dischargefpressure was approximately 990 psig to achieve 600

-gpm. These two injections represent-the first and second RCIC actuation. cycles to date.

On March 1, 1985 Startup Test Procedure (STP).14.5-1,. ,

" Stability Check. CST to RPV at 150 PSIG", was performed.. The test involved one intentional RCIC injection into the reactor vessel. This injection consisted of a RCIC quick start in automatic mode to a flowrate of 600 gpm. Flow step changes were performed such that RCIC flowrate varied between 535 and 610 gpm.

, Reactor parameters for this injection were as-follows:

Power level less than 3%-of rated, reactor-vessel dome pressure 160 psig, and moderator temperature 360 degrees F. RCIC pump suction was lined up to the Condensate Storage Tank and pump 220 psig to achieve 600 gpm.

discharcre This iniection represents the third R CIC actuation cycle to date.

pressure was approximately ,

0 On' April 3, 1985.Startup Test Procedure (STP) 14.5-2, i

" Stability _ Check CST to RPV at 150 PSIG", was performed. The test involved one intentional RCIC injection into the reactor vessel. This. injection consisted of a RCIC quick-start in' automatic mode, to a flowrate of 600 gpm to prove the RCIC system operable following maintenance.

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Dr. Thomas E. Murley May 24. 1985 j Page 3 Reactor parameters for this injection were as follows:

Power, level less than 3% of rated, dome pressure 150 psig, and moderator temperature 355 degrees F. RCIC pump suction was lined up to the. Condensate Storage Tank and pump discharge pressure was ,

approximately.200 psig to achieve 600 gpm. This injection represents the fourth RCIC actuation cycle to date.

Ot. April 6, 1985 Startup Test Procedure (STP) 14.6-1, "RCIC Cold Quickstart at Rated Pressure-CST to 1@V", was performed.- The test involved one intentional RCIC injection into the reactor-vessel. This injection consisted of a RCIC quick start in automatic mode to a flowrate of 600 gpm.

Reactor parameters for this injection were as follows:

Power level less than 4% of rated, dome pressure approximately 920 psig, and moderator temperature 520 degreeslP. RCIC pump suction was lined up to the Condensate Storage Tank and pump discharge pressure was approximately 990 psig to achieve 600 gpm.

This :inj ection represents the fifth RCIC actuation cycle to date.

On April 9, 1985 Startup Test Procedure (STP) 14.6-2, "RCIC Cold Quickstart at Rated Pressure-CST to RPV", was performed. The test involved one intentional RCIC injection into the reactor vessel. This injection consisted of a RCIC quick start iri automatic mode to a flowrate of 600 gpm.

Reactor parameters for this injection were as follows:

Power level less than 4% of rated, dome pressure approximately 920 psig, and moderator temperature 520 degrees F. RCIC pump suction was lined up to the Condensate Storage Tank and pump discharge pressure was approximately 990 psig to achieve 600 gpm.

This injection represents the sixth RCIC actuation cycle to date.

On April 12, 1985 Startup Test Procedure (STP) 14.6-3, "RCIC Cold Quickstart at Rated Pressure-CST to RPV", was performed. The test involved one intentional RCIC injection into the reactor vessel. This injection consisted of a RCIC quick start in automatic' mode to a' flowrate of 600 gpm.

Reactor parameters for this injection were as follows:

Power level less than 4% of rated, dome pressure approximately 920 psig, and moderator temperature 520 degrees F. RCIC pump suction was lined up to the Condensate Storage Tank and pump discharge pressure was approximately 990 psig to achieve 600 gpm.

This in:lection represents the seventh RCIC actuation cycle to date. There were no adverse effects on the reactor vessel or the RCIC system as a result of this injection.

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.J w g Dr. Thomas E. Murley May 24, 1985

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p Since these activities occurred as a result of startup testing,.no corrective. action is to be taken.

~Should you require additional information, please do not hesitate to contact us.

Very truly yours, W. T. Ullrich Superintendent Nuclear Generation Division cc: J. T. Wiggins, Senior Site Inspector

~See Attached Service List f

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c: Judge Helen F. Hoyt Judge Jerry Harbour Judge Richard F. Cole Troy B. Conner, Jr., Esq.

Ann P. Hodgdon, Esq.

Mr. Frank R. Romano Mr. Robert L. Anthony Ms. Phyllis Zitner Charles W. Ellio$t, Esq.

Zori G. Ferkin, Esq.

Mr. Thomas Gerusky Director, Penna r Emergency Management Agency Angus Love, Esq.

. David Wersan, Esq.

Robert J. Sugarman, Esq.

Martha W. Bush,.Esq.

Spence W. Perry, Esq.

Jay M. Gutierrez, Esq.

' Atomic Safety & Licensing Appeal Board Atomic Safety & Licensing Board Panel Docket.& Service Section (3 Copies)

James Wiggins Timothy R.,S. Campbell i

1 January 16, 1985 l