ML20034B300
| ML20034B300 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 04/19/1990 |
| From: | Devincentis J YANKEE ATOMIC ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20034B301 | List: |
| References | |
| BYR-90-56, GL-89-04, GL-89-4, PC-234, NUDOCS 9004260347 | |
| Download: ML20034B300 (3) | |
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. YANKEE ATOMICELECTRIC COMPANY "C"l,Rs*g>l;fr*l" u
- g-580 Main street, soiton. uassachusetts otiso.1seg
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April 19, 1990-BYR 90-56 PC-234 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555
References:
(a)' License No. DPR-3 (Docket:No. 50-29)
- j (b) NUREG-0452, Revision.4. " Standard Technical Specifications for Westinghouse Pressurized Water Reactors," issued Fall 1981 (c) Letter, BYR-89-149, " Response to Generic' Letter 89-04,"
dated October 3, 1989 l
Subject:
Changes In ECCS Pump Technical Specification' Surveillance-
Dear Sir:
Pursuant to Section 50.90 of the Commission's Rules and Regulations, the Yankee Atomic Electric Company hereby requests authorization to make the following changes.
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Proposed Change Reference is made to the Technical Specifications of the Yankee Nuclear
. Power Station's (YNPS's) Operating License No. DPR-3.
We hereby propose to i
modify Technical Specification Surveillance Requirement 4.5.2a to change the ECCS pump surveillance frequency from monthly to quarterly and to remove the l
minimum required discharge pressures from the Technical Specification.
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The revised pages are attached.
i Reason and Basis for Change This proposed change is prepared to bring the High Pressure Safety Injection (HPSI) and LPSI pump surveillance frequency requirements in line-with the Standard Technical Specifications for Westinghouse Pressurized Water Reactors (PWRs) contained in NUREG-0452, Revision 4, Reference (b) while I
providing for re-establishment of ASME XI inservice testing reference values 9004260347 900419 PDR ADOCK 05000029 IV LP PDC I\\
United States Nuclear Regulatory Commission April 19,,1990 Page 2 l
as provided for in the code. NUREG-0452 requires surveillance of these pumps l
only when they are being tested-to meet the in-service' testing required by Section XI of the ASME Boiler and Pressure Vessel Code in effect for each specific plant.
I The code in effect for Yankee is the 1977 edition through the 1978 summer addendum which requires monthly pump testing..However, editions ~and addenda to the code after this have changed pump testing to quarterly.. Yankee's In-service Testing Program is being updated to a-later edition of the code which will require quarterly pump testing. Reference (c) requested specific j
code relief to perform quarterly pump inservice testing on.an interim basis until the program is formally updated. This proposed change will bring l
Yankee's pump testing requirements in line with the Westinghouse Standard l
Technical Specifications of NUREG-0452 the intent of which is to link the Emergency Core Cooling System (ECCS) pump surveillance to the ASME Section XI Program.
The minimum discharge pressure requirement is being deleted frcm surveillance requirement in 4.5.2a because ECCS pump operational readiness is j
verified through implementation of the Inservice Testing Program as delineated in Specification 4.0.5.
Removal of minimum discharge pressure values will provide for
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re-establishment of hydraulic reference values as allowed by ASME XI witho2t j
having to revise plant Technical Specification each time.
l For example, plant modifications are scheduled to be implemented during l
the next refueling outage which will facilitate more meaningful substantial flow testing of the YNPS ECCS pumps. The resultant operating data will be i
more indicative of the pump hydraulic and mechanical condition. These changes will necessitate establishing new ASME XI hydraulic reference values for i
differential pressure and flow for each pump.
Since operational readiness of j
the pumps is demonstrated through compliance with Specification 4.0.5 by the l
plant Inservice Testing Program, there is no need for duplicate or j
supplemental Technical Specification surveillances.
4 The Inservice Testing Program at YNPS will continue to ensure that pump operational readiness criteria are consistent with the requirements of ASME XI.
System performance surveillance will continue to be conducted in accordance with plant Technical Specifications.
Safety Considerations This change is requested in order to revise the HPSI and LPSI pump surveillance requirements in Section 4.5.2a of the YNPS Technical i
Specifications. As such, this proposed change would not:
1.
Involve a significant increase in the probability or consequences of an accident previously evaluated.
This change only revises the surveillance requirements for these pumps. The purpose of these i
surveillance requirements is to prove that the pumps are operable.
The revised surveillance requirements will continue to demonstrate pump operability.
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United States' Nuclear Regulatory Commission April 19, 1990 Page 3 2.-
Create the possibility of a new or different kind.of_ accident-from-any previously evaluated. Verification of pump operability is maintained while' requiring:no system configuration changes in order-to perform surveillance testing, which adversely affect' system.
functional performance.
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Involve a significant reduction in a margin of safety. Verification of pump operability is maintained. The Inservice Testing Program at YNPS will continue to ensure that pump operational readiness criteria are consistent with the requirements of ASME XI.
System ~
performance surveillance will continue.to be conducted inuaccordance with plant Technical Specifications.
Based on the discussion above, it is concluded that there is reasonable assurance that operation of the Yankee plant, consistent with the proposed-
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Technical Specifications, will not endanger the health and safety of the public. This proposed change has been reviewed by the Nuclear Safety Audit and Review Committee.
We trust that you willIfind this. submittal satisfactory; however, should' you desire. additional information, please contact - us.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY J. DeVincentis Vice President l
l JD/ pac /WPP79/28 l
l Attachment I
cc: USNRC Region I USNRC Resident Inspector, YNPS COMMONWEALTH OF MASSACHUSETTS) i
)ss WORCESTER COUNTY
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Then personally appeared before me, J. DeVincentis, who, being duly sworn, did state that he is Vice President of Yankee Atomic Electric Company, L
that he is duly authorized to execute and file the foregoing document in the I
name and on the behalf of Yankee Atomic Electric Company and that the statements therein are_true to the best of'his knowledge and belief.
MYh.
Osv1 m1 n R Gb Helen D. Sammarco-Notary Public My Commission Expires November 7, 1991~
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