ML19320C690

Responds to IE Bulletin 80-06, Engineered Safety Feature (ESF) Reset Controls. Test to Verify That Actual Installed Controls Are Consistent W/Schematics Reviewed Will Be Completed During Fall 1980 & Early 1981 Refueling Outages

ML19320C690
Person / Time
Site:	Calvert Cliffs
Issue date:	06/17/1980
From:	Lundvall A BALTIMORE GAS & ELECTRIC CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-80-06, IEB-80-6, NUDOCS 8007170576
Download: ML19320C690 (4)

Text

.9 fW BALTIMORE GAS AND ELECTRIC COMPANY P. O. B O X 147 5 BALTIM OR E, M ARYLAN D 212 03 June 17, 1930 Antwum E. LUNDVALL.dR.

vecc PatscO(NT se s Office of Inspection and atforcement U. S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 Attn: Mr. Boyce H. Grier, Director Subject : Calvert Cliffs Nuclear Ibwer Plant Units Hoc.1 & 2, Dockets Nos. 50-317 & 50-318 IE Bulletin 80-06 ESF Reset Controls Gentlemen:

As required by the subject Bulletin, we have reviewed the design for all systems serving safety-related functions at the schematic level to determine whether or not, upon reset of an ESF actuatio.n signal, all associated safety-related equipment remains in its emergency mode.

he schematic design ensures that all equipment will remain in its emergency mode upon reset of the applicable actuation signal except as discussed below.

For each of the categories where the cchematic design alone does not prevent mode change, adequate procedures or system design obviate the need for any design modifications.

h e ESF actuation system does not automatically reset when the initiating parameters return within bounds; the system does not allow blocking nor overriding the actuation signals, neither manually nor via any process control signal.

Procedures following any actuation, specified in Emergency Operating Procedure (EOP) -5, require placing individual hand controls for all equipment in their actuated (i.e., safe) position.

Rese procedures contain detailed checklists which list each handsvitch and its required position.

When initiating perameters return within bounds, several deliberate operator actions are required before the equipment can chance mode: he operator must first manually reset the individual trips, then individually return each handswitch to the non-accident position.

hese features ensure that the equipment will remain in its emergency mode upon reset of the actuation signal, and no modifications are necessary.

Equipment in this category is as follows (all are both units 1 and 2 unless noted):

8 007170 5'7C

.s It. B. H. Grier June 17, 1980 CV510, CV511 Doric Acid Tank Recirculation Valves

-CV512 1hkeup Flow Control Valve MOV501 Volume Control Tank Discharge Valve CV3840, Cv3842 Component Cooling to Waste Evaporator Isolation Valves CV5210, CV5212 Service Water Heat Exchanger Control Valves MOV5250, MOV5251 Salt Water to Circulating Water Pump Room Air Cooler Isolation Valves Cvl582, CV1585, Containment Cooling Unit Discharge Valve CV1590, CV1593 1CV1596,1CV1597, Spent Fuel Ibol Cooler Discharge And Supply 1CV1598,1CV1599 Valves W1600, CV1638, service Water to Turbice Building Isolation Valves CV1637, CV1639 CV3833, CV2830 Shutdown Cooling Heat Exchanger Discharge Valves CV4150, CV4151 Containment Spray Header Isolation Valves MOV4144, MOV414'5 Containment Sump Discharge Valves MOV659, NOV660 Contain=ent Spray and Safety Injection Pumps Recirculation Valves SV5285, "15287 Penetration Room Filter Isolation Dampers h e following equipment is prevented from reset out of the emergency mode upon reset of the actuation signal by administrative procedures:

MOV656 Manual HPSI Header Isolation Valve - his valve is physically locked open in the emergency position at all times.

MOV614, POV624, Safety Injection Tank Isolation Valves - he MOV634, M0v644 emergency position of each of these valves is open.

Rese valves are opened during normal opera-tion.

Ibwer is then removed from the motor operator of each valve to insure the emergency valve position is maintained at all times.

Mr. B. H. Grier June 17, 1980 ID231, ID3n Containment Purge Air Supply and Exhaust Fans -

'lhe emergency mode of these fans is off.

During normal operation, power is removed from the fans to ensure the emergency fan mode is maintainea at all times.

%e.Tollowing equipment may change operating mode upon reset of the actuation signal, as described below:

CV5160, CV5162 kmponent Cooling Water Heat Exchan6er Inlet Valves CV5163, CV5206, Component Cooling Water Heat Exchanger outlet CV5208 Valves Each of these valves receives two actuation signals - Safety Iy. ection Actuation Signal (SIAS) and Recirculation Actuation Signal (RAS).

The SIAS signal closes these valves to isolate the Component Cooling Water Heat Exchanger from the Salt Water System.

Eis allows more salt water to flow to the Service Water Heat Exchanger during a Ioss of Cooln.it Accident.

Following reset of the SIAS signal, these valves must reopen to supply cooling water to the Component Cooling Water System.

A RAS signal also reopens these valves to put the Component Cooling Water Heat Exchanger back in service.

Following reset of the RAS signal each of these valves remains open.

This operation scheme is intentional, presents no safety problem, and requires no modifications.

A test to verify that the actual installed instrumentation and controls at Calvert Cliffs are consistent with the schematics reviewed will be completed du11ng our next scheduled refueling outage, currently scheduled for Fall 198o for Unit no.1 and early 1981 for mit Ib. 2.

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BALTIMORE GAS AND ELECTRIC COMPANY f/

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BY:

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^..x w d. ~~.-L C [

~ Vice Presi, dent, Supply j

TO WIT:

CITY OF BALTIMORE:

Arthur E. Lundvall, Jr. being duly sworn states that he is Vice President of the Baltimore Gas and Electric Company, a corporation of the State of Maryland; that he executed the foregoing response for the purposes therein set forth; that the statements made in said response are true and correct to the best of his knowledge, information and belief; and that he was authorized to execute the response on behalf of said corporation.

WITNESS It Hand and Notarial Seal:

LL u

L.L a_u Notary Pub 1'ic It Commission Expires:

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- Mr. B.'H. Gricr 16 -

Juna 17, 1980 r

I cc: Division of Reactor Operations Inspection Office of Inspection and Enforcement U. S. Nuclear Re6ulatory Cor.cission i

Washington, D.-

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20555

.L J. A. Biddison, Esquire 1

G. F. Trowbridge, Esquire Mr. E. L. Conner, Jr.-

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