ML19316B073
| ML19316B073 | |
| 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, TAC-42722, NUDOCS 8006110275 | |
| Download: ML19316B073 (4) | |
Text
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T S2' t United States Nuclear Regulatory Commission Office of Inspection and Enforcement Boyce H. Grier, Regional Director Attn:
Region I 631 Park Avenue 19406 King of Prussia, Pennsylvania Beaver Valley Power Station, Unit No. 1
Reference:
Docket No. 50-334, License No. DPR-66 I.E. Bulleein 80-06
Dear Mr. Grier:
We have reviewed the referenced bulletin concerning Engineered Safety Feature (ESF).".eset Controls with the following results.
A review of the drawings for all systems serving safety-related functions to determine whether or not upon the reset of an ESF 1.
actuation signal, all associated safety-related equipment remains The following tabu-in its emergency mode has been completed.
lacion lists tha equipment that does not remain in the e=ergency mode and lists the proposed corrective action and schedule for implementation.
The air ejector vent containment isolation valve automat-if a radiation monitor Hi-H1 a.
ically opens upon CIE reset A seal-in circuit will be alarm signal is also present.the valve from opening on C13 installed that will prevent Operator reset even with a radiation monitor alars present.
action at the control switch in the control room will be This modifica-required to open the valve after CIS reset.
startup tion will be completed prior to the schedule plant scheduled for July 1980.
from normal The charging pump cubicle exhaust da=pers shift auxiliary building ventilation to the supplementary leak b.
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 A seal-in circuit will be provided g/
in the ESF position.
S M
8006110 7/5
'Ber.vtr Vellsy Pow r Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 I.E.Bulletin 80-06 Page 2 b.
(continued) that will prevent the dampers from returning to their normal position on CI3 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 CIS 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 CIS 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 sw1tch 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 Saf ety 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 =ain 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 signal. With these features, the opening of the contro1' valves has no effect upon feedwater flow to the steam We have determined that no corrective action is generators.
required for these valtes.
i B:cvar Vellcy Powsr Station, Unit No. 1 Docket No. 334, License No. DPR I.E.Bulletin 80-06 Page 3 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 4
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 7
i office.
Very truly yours, i'
C. N./<......-.
s Dunn Vice President, Operations cc:
U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement i
Division of Reactor Operation Inspection Washington,-D.C.
20555 Mr. D. A. Beckman, Resident Inspector U.S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, Pennsylvania 15077
/ U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D.C.
20555-
(COPSORATE SEAL)
Attest:
1t u, d/
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T. WolferkJr.
Secretary COMMONhT.ALTH OF PENNSYLVANIA)) SS:
COUNTY OF ALLEGIFI on this 4
day of T. wc' 1980, before a Notary Public in and for said Ccmmonwealth tonaT.n W AMNNON and County, personally appeared C. N. Dunn, who being duly sworn, deposed, me, and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorised to execute and file the foregoing Submittal on behalf of said forth in the Submittal are true and ccmpany, and (3) the statements set correct to the best of his knowledge, information and belief.
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DGN ALD W. SHANNCN. NOTARY PUS'JC FITT!20ROH. ALLEGHENY COUNTY MY CCMMISSION EXPIRES JUNE 7.1983 Wember. Pennsylvania Association of NMares
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