ML19310A818
| ML19310A818 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 06/04/1980 |
| From: | Dunn C DUQUESNE LIGHT CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-06, IEB-80-6, NUDOCS 8006300552 | |
| Download: ML19310A818 (4) | |
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'Af wzu ase-soco June 4, 1980 plgfy" 15219 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Attn: Boyce H. Grier, Regional Director Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Beaver Valley Power Station, Unit No. 1
Reference:
Docket No. 50-334, License No. DPR-66 I.E.Bulletin 80-06
Dear Mr. Grier:
We have reviewed the referenced bulletin concerning Engineered Safety Feature (ESF) Reset Controls with the following results.
A review of the drawings for all systems serving safety-related 1.
functions to determine wnether or not upon the reset of an ESF actuation signal, all associated safety-related equipment remains in its emergency mode has been completed. The following tabu-lation lists the equipment that does not remain in the emergency mode and lists the proposed corrective action and schedule for implementation.
The air ejector vent containment isolation valve automat-ically opens upon CIB reset if a radiation monitor Hi-Hi a.
A seal-in circuit will be alarm signal is also present.the valve from opening on CIB installed that will prevent reset even with a radiation monitor alarm present. Operator i
action at the control switch in the control room will be This modifica-required to open the valve after CIB reset.
tion will be completed prior to tha schedule plant startup scheduled for July 1980.
The charging pump cubicle exhaust dampers shift from normal b.
auxiliary building ventilation to the supplementary leak collection and release system (SLCRS) on a CIB signal and automatically return to their normal alignment on CIB reset unless hand switches located in the auxiliary building are in the ESF position.
A seal-in circuit will be provided 9006300 '5' 5 2.
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Bzavar Valley Power Station,-Unit No. 1 Docket No. 50-334, License No. DPR-66 1.E.Bulletin 80-06 Page 2 b.
(continued) that will prevent the dampers from returning to their normal
_ position on CIB reset. Operator action at the local control station in the auxiliary building will be required to return This the dampers to their normal position after CIB reset.
modification will be completed prior to the scheduled plant startup in July.
The safeguards pit isolation dampers close automatically on c.
a CIB signal and open on CIB reset unless hand switches located in the safeguards building are in the ESF position.
A seal-in circuit will be provided as in (b) above. The modi-fication will be completed prior to the scheduled plant startup in July.
d.
The SLCRS bypass and exhaust dampers move to their safety position on a CIA signal.
The dampers have a maintained OPEN-CLOSE switch which will allow the dampers to return to their normal position on resetting, CIA. A seal in circuit will be provided to prevent the dampers from returning to their normal position on CIA reset. Operator action at the control switch in the control room will be required to re-position the dampers after CIA reset.
This modification will be completed prior to the scheduled plant startup in July.
The Safety Injection accumulator discharge isolation valves e.
have control switches which are maintained in CLOSE and spring return from OPEN to AUTO.
If the switch is in the CLOSE posi-tion, the valve will open on SIS but reclose if SIS is reset because of the maintained close switch position. The bypass is physically defeated by placing the valves in the open posi-tion and disconnecting power to the valve operator control circuits and removing the plug in the lock out circuit.
Pro-cedures are in use which place this feature into effect in the. proper operating modes and verify the open position per Technical Specifications. We have determined'that no further action is required for these valves.
f.
Upon reset of the Feedwater Isolation Signal, the main feed-water control and bypass valves will return to their control function. Although there is no means to physically defeat the reset of these valves, the upstream isolation vavles close and main-feedwater pumps trip off on feedwater isolation and do not automatically open or restart on reset of the signal.
Procedures also require the resetting of the valve controllers to-the "0" open position prior to resetting the feedwater isolation signa). With these features, the opening of the control valves has no effect upon feedwater flow to the steam We have determined that no corrective action is generators.
required for these valves.
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Braver Valley Powar Station, l' nit No. 'l
- Docket :.o. 50-334, License No. DPR-66 I.E.Bulletin 80-06 Page 3 T
2.
A test to demonstrate that all equipment remains in its emergency mode upon removal and/or manual resetting of the various isolating or actuation signal will be completed prior to the scheduled plant startup in July. The test will be in conjunction with the 18 month ESF actuation system test and will also verify the modification
. described above function as designed.
If you have any. questions concerning this response, please contact my of f ice.
Very truly yours, 7
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C. N./ i l,.... --
Dunn Vice President, Operations i
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U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Qperation Inspection Washington, D.C.
20555 Mr. D. A. Beckman, Resident Inspector U.S. Nuclear Regulatory Commission i
Beaver Valley Power Station Shippingport, Pennsylvania 15077 s
1 U.S. Nuclear Regulatory Commission c/o Document Management Branch l
l Washington, D.C.: 20535 J
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(CORPORATE SEAL)
Attest:
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T. Wolfer /ATr.
Secretary COMMONWEALTH OF PENNSYLVANIA)) SS:
CCUNTY OF ALLEGIEFI On this v '*
day of 7~sst ~
1980, before a Notary Public in and for said Commonwealth me, tnHT D W _ SW ANNON and County, personally appeared C. N. Dunn, who being duly sworn, deposed, and said that (1) he is Vice President of Duquesne Light, (2) he is duly j
authorized to execute and file the foregoing Submittal on behalf of said forth in the Submittal are true and j
Company, and (3) the statements set correct to the best of his knowledge, information and belief.
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DONALD W. SHANNCN. NOTARY PUBL!C PIIISBURGH, ALLEGHENY COUNTY MY COMMISSION EXIIRES JUNE 7.1933 Member, Pennsylvar:ia Associaten of Nota'es
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