ML19210F038

Interim Deficiency Rept Re Containment Depressurization Actuation & Safety Injection Actuation Circuitry.Safety Circuits Being Redesigned to Comply W/Fsar Commitments

ML19210F038
Person / Time
Site:	North Anna
Issue date:	11/21/1979
From:	Brown S VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
References
REF-PT21-79-173-000 964, NUDOCS 7912130434
Download: ML19210F038 (3)

Text

e e .*

6 Ve co -

• VARGINI A ELECTRIC AND POWER CCMP ANY. RICHMOND, vinGINI A 23261 November 21, 1979

I 'c . .

46 Mr. James P. O'Reilly, Director Serial No. 964 Office of Inspection & Enforcement PSE&C/GLP:mac: wang U. S. Nuclear Regulatory Commission Region II Docket No. 50-339 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303

Dear Mr. O'Reilly:

On November 16, 1979, a report was made under the provisions of 10CFR50.55(e) concerning Containment Depressurization Actuation (CDA) and Safety Injection (SI) Actuation Circuitry.

In accordance with the reporting requirements of 10CFR21, the following information is submitted:

A. Name and address of reporting individual:

Mr. E. A. Baum, Executive Manager Licensing and Quality Assurance Virginia Electric and Power Company P. O. Box 26666 Richmond, Virginia 23261

8. Facility, activity and/or component affected:

North Anna Power Station, Unit 2 Miscellaneous Devices Affected by CDA or SI Signals C. Name of firm constructing the facility or supplying the component, activity or service:

Stone & Webster Engineering Corporation P. O. Box 2325 Boston, Massachusetts 02107 D. Description of defect, deficiency, or failure to comply:

The following areas do not comply with IEEE 279-1971 Section 4.16:

1. A resetting of the CDA (Containment Depressurization Actuation) signal prior to expiration of the time delay relays will prohibit the start of the following pumps:

1552 348

//i

'71oWF o.axu cc 7912130 g g

a. Recirculation Spray Pumps 2-RS-P-1A, 18, 2A & 2B (195 Sec & 210 Sec) (ESK SAW, 5AX, 65 & 67).

b. SW Rad. Mon. Sample Pumps 2-SW-P-5, 6, 7, & 8 (120 Sec) (ESK-6JP).

The following areas do not comply with the response to comment 7.4 in the FSAR:

1. A resetting of the CDA signal and a subsequent loss of offsite power results in non-automatic restart of the following pumps on restoration of site emergency power:

a. Recirculation Spray Pumps 2-RS-P-1A,1B, 2A & 2B

b. Recire. Spray Casing Cooling Pumps 2-RS-P-3A & 3B (ESK-6JAE)

c. Quench Spray Pumps ?-QS-P-1A & 1B (ESK-6K&L)

2. On resetting of the CDA or SI signal, the following devices return to their non-emergency mode without a second operator action on the device control circuit:

a. Service Water Valves to Cont. Recirc. Air Coolers MOV-SW 210 A & B (ESK-6DD)

MOV-SW 214 A & B (ESK-6DG) 50V-SW 201A - 1 & 2 (ESK-6QE)

S0V-SW 201B - 1 & 2

b. Main Control Room Supply & Exhaust Air Op. Dampers 50V-HV-160-1 & 2 (ESK-6PW) 50V-HV-161-1 & 2

c. Charcoal Filter Air Op. Dampers 50V-HV-115 A2 (ESK-6PU)

S0V-HV-115 B2 SOV-HV-228-1 & 2 (ESK-6PA)

d. Cont. Recire. Fans 2-HV-F 1A & IB (ESK-6B & C)

e. Cont. Rod Drive Cooling Fans 2-HV-37A, B, C, D, E, & F (ESK-6KZ) 1552 349

E. Date of determination of reportability:

November 16, 1979 F. Similar components, activities, or services:

North Anna Power Station, Unit 1 G. Corrective action which has been, is being or will be taken, the individual responsible and the lengtn of time to complete the action:

The aforementioned safety circuits are being redesigned to be in compliance with the commitments in the FSAR.

H. Other information:

None Any information not available at this time will be submitted in a follow-up letter as a 30-day report.

Should you require further information, please contact this office.

.- trul y s, f /

h S . C. Brown, Jr.

II Senior Vic President - Pow r uation Engin ering and Constr cti n cc: Director, Office of Insoection and Enforcement (3) 1552 350 9