ML20148P516
| ML20148P516 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse, Oconee, Arkansas Nuclear, Crystal River, Haddam Neck, San Onofre, Cook, Yankee Rowe, Maine Yankee, Rancho Seco, Crane |
| Issue date: | 06/30/1997 |
| From: | Racquel Powell NRC OFFICE OF ADMINISTRATION (ADM) |
| To: | Barry D PIERCE, ATWOOD, SCRIBNER, ALLEN, SMITH & LANCASTER |
| Shared Package | |
| ML20148P522 | List: |
| References | |
| FOIA-97-154, RTR-NUREG-0737, RTR-NUREG-737 NUDOCS 9707020352 | |
| Download: ML20148P516 (2) | |
Text
U,5, NUCLEAR CETULATO;Y COMMISSION NHC f OiA htGUEbt NUMbtH(b)
FOIA - P g f e
HESPONSE T VPE f
's RESPONSE TO FREEDOM OF InNAL LY1 PAR t l A L j F7
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INFORMATION ACT (FOIA) REQUEST o^1E M 3t v e,e.
DOCK E i NUVBE h I50 (!! apphcante]
H E QUE ST E H Y,/[ o b
f PART l.-AGENCY f)fDORDS RELEASED OR NOT LOCATED (See checked hores/
No agency records subject to the request have been located No additional agency records subject to the request have been located Requested records are evadable through another pubbe distribution program See Comments section.
Agency records subject to the request that are identified in Append,m fes) are already avadable for pubhc inspection and copying at the NRC Pubhc Document Room. 2120 L Street, N.W., Washington, DC.
Agency records subject to the request that are identified in Append:xfes) 8 are being made available for pubhc inspection and copying at th) NRC Pubhc Document Room,2120 L Street, N.W., Washington, DC, in a fo7 der under this FOI A number.
The nonproprietary version of the proposal (s) that you agreed to accept in a telephone conversation with a member of my staf f is now being made avadabic for public inspection and copying at the N RC Pubhc Document Room,2120 L Street, N.W., Washingtor, DC, in a folder under this F OI A number.
Agency records subject to the request that are identified in Appendix (es) may be inspected and copied at the N RC Local Pubhc Document Room identified in the Comments section.
Enclosed is information on how you may obtain access to and the charges for copying records located at the NRC Pub 4c Document Room,2120 L Street, N.W, Washingtort DC.
K Agency records subject to the request are enclosed.
Records subject to the request havs Men referred 'o another Federal agency (ies) foi resiew and direct response to you Fees You will be billed by the NRC for fee. totahng $
You wdl receive a refund from the NRC in the amount of $
in view of NRC's response to this request, no further action is being taken on appeal letter dated
, N o.
PART 11. A INQRMATION WITHHELD FROM PUBLIC DISCLOSURE CrrtInn information in the reouetted records is being withheld from public disclosure pursuant to the exemptions described in and for the reasons stated in PJrt II, B, C, and D. Any released portions of the documents for which only part of the record is being withheld are being made available for public inspIction and copying in the NRC Pubhc Document Room,2120 L Street, N.W., Washington, DC in a folder under this FOI A numtier.
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u 9707020352 970630 PDR FOIA BARRY97-154 PDR
Re: FOIA-97-154 APPENDIX B RECORDS BEING RELEASED IN THEIR ENTIRETY
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i fEL DATE DESCRIPTION /(PAGE COUNT) i 1
1.
01/03/82 NRC Information Notice 92-02: RELAPS/ MOD 3 Computer Code Error Associated with the Conservation of Energy Equation (4 pages) i 2.
04/06/84 Memo to C. O. Thomas from B. W. Sheron,
Subject:
Review of j
YAEC ll.K.3.30 SBLOCA EM Model (34 pages) j 3.
07/17/84 Memo to B. W. Sheron from E. D. Throm.
Subject:
Summary of 6/22/84 YAEC-NRC Meeting on RELAP5YA PWR SBLOCA EM Analysis (7 pages) j 4.
06/01/88 Memo to S. A. Varga from J. Calvo (9 pages)
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FOIA/PA REQUEST
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ATTORNEYS DAv!D E. BARRY April 30,1997
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VIA UPS OVERNIGHT MAIL osarne Mm*^'*d="
Director, Division of Freedom ofInformation and Publications Services Office of Administration U.S. Nuclear Regulatory Commission Washington,DC 20555 l
t Re:
freedom ofInformation Act Reants!
Dear Sir or Madam:
j Pursuant to the Freedom ofInformation Act,5 U.S.C. 552, and the Nuclear Regulatory Commission's implementing regulations,10 C.F.R. Part 9, I hereby request copies of or access to any information, including but not limited to: notes, letters, memoranda, drafts, minutes, diaries, logs, calendars, tapes, transcripts, summaries, interview reports, procedures, instructions, andyses, drawings, files, i
graphs, charts, maps, photographs, agreements, handwtitten notes, studies, data, notebooks, telephone messages, computations, interim and/or final reports, status reports, and any and all other records or documents related to and/or generated in
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connection with:
l
- 1. The Yankee Atomic Electric Company RELAP5YA emergency core cooling system (ECCS) evaluation model; I
- 3. Three Mile Island Action Items II.K.3.30 and II.K.3.31 as applied to the Maine Yankee plant; and One Monument
- 4. The 2630 MWt power uprate for the Maine Yankee plant and the 2700 Port nd ine 04101-1110 MWt power uprate for the Maine _ Yankee plant.
voice 207.791.1100 207. 91.1350
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E Man mfowherceAtmx>d.com
e Director, Division of Freedom ofInformation and Publications Services April 30,1997 Page 2 Pursuant to 10 C.F.R. Q 9.23(bX4XiXc), I specifically accept the cost involved in searching for and duplicating the information I have requested, and do not requim advance notice of costs exceeding $25.
I look forward to hearing from you within the ten days required by statute.
ery truly yo r
- i. Barry DEB:bjf I
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UNITED STATES NUCLEAR REGULATORY COMMISSION 0FFICE OF NUCLEAR REACTOR REGULATION
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kASHINGTON, D.C.
20555 January 3, 1992 NRC INFORMATION NOTICE 92-02:
RELAP5/M003 COMPUTER CODE ERROR _ ASSOCIATED WITH THE CONSERVATION OF ENERGY EQUATION Addressees All holders of operating licenses or construction permits for nuclear power reactors.
i Purpose The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice to alert addressees of an error in the RELAPS/M003 computer code associated with the conservation of energy equation.
The computer codes in the RELAPS Series are general purpose, thermal hydraulic system codes used to simulate the response of systems such as the reactor coolant system (RCS) to transients and accidents.
It is expected that recipients will review the information for applicability to their facilities and consider actions, as appropriate, to avoid similar problems. However, suggestions contained in this information notice are not NRC requiremerts; therefore, no specific action or written response is required.
Description of Circumstances On November 25, 1991, Northeast Utilities forwarded the enclosed 10 CFR Part 21 initial notification to the NRC Operations Center, regarding an error in the RELAP5/H003 simulation of the response of the Haddam Neck Plant terry turbine room to a postulated steam line break.
The equipment environmental qualifica-tion (EEQ) profile for the room would have been nonconservative by approxi-mately 100*F had the simulation been accepted. Although the error in deter-mining the environmental conditions could be significant, the effect of the i
error on the evaluation of the nuclear steam supply system (NSSS) response to a loss-of-coolant accident (LOCA) and steam line break has been determined to be negligible. Appropriate corrections in the code are the responsibility of the Idaho National Engineering Laboratory (INEL).
Codes in the RELAPS Series are not intended to be used as containment analysis codes.
Containment analysis specific codes exist for that purpose.
The primary purpose of the RELAPS codes is analysis of the response of the NSSS to accident and transient conditions.
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IN 92-02 January 3, 1991 Page 2 of 2 This information notice requires no specific action or written response.
If you have any questions about the information in this notice, please contact the technical contact listed below or the appropriate Office of Nuclear Reactor Regulation (NAR)projectmanager.
harles E. Rossi, f m f
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Director Division of Operational Events Assessment Office of Nuclear Reactor Regulation Technical contact: Mancy Campbell, NRR (301) 504-2836 Attachments:
1.
Northeast Utilities 10 CFR Part 21 Notification 2.
List of Recently Issued NRC Information Notices
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At t actrw I I: o?-o:
January 1 10N Pr:rp 1 o! !
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P.o.ser rio mo omtcvcur oem.cno Nov. 25,1991 NRC Operations Center Fax. #(301) 492-8187 4
SUBSTANTIAL SAFETY HAZARD 10CFR21 The purpose of this facsimile is to inform the NRC that on November 25,1991, at 1605 hours0.0186 days <br />0.446 hours <br />0.00265 weeks <br />6.107025e-4 months <br />, J.F. Opeka, Executive Vice President of Northeast Utilities (NU) determined that a substantial safety hazard (SSFD exists.
During an in house engineering evaluatim. of the response of the Haddam Neck Plant Terry Turbine room to a postulated steam line creak, an error was discovered in the RELAPS/ MOD 3 almulation.
It was determined that the code was not censerving energy, and thereby had significantly under predicted the temperature in the Terry Titrbine room. Had the simulation been accepted, the EEQ profile for the room would have been non-conservative by appmximately 100' F..
The RELAPS series of computer codes are general purpose, thermal hydraulic systems codes which are used to simulate the response of systems such u the RCS to transients and accidents.
The codes are written to solve the equations of conservation of mass, energy and momentum within the system being modeled.
)
The code solves for the system response by modeling the system as a series of contro!
volumes connected by junctions and solving the conservation equations simultaneously in each volume and Junction using a finite difference numerical scheme, ne error appears to be associated with the conservation of energy equation.
While the error in determining environmental conditions can be significant, be impact of the error on evaluations of the NSSS response to LOCA and steam line break has been determined to be negligible. NU has made a tentative correction to its version of RELAPS/ MOD 3. A permanent correction of the error will be made to other NU codes, which are based on RELAP5, when the Idaho National Engineering Laboratory (INEL) provides the appropriate corrections. The impact of the error on i
licensing calculations will be formally arsessed and reported via 10CFR50A6, if j
necessary.
According to 10CFR21.21(c)(3) 11, written notification to the NRC will be forthcoming within 30 days.
If you have any questions regarding this matter please caJ1 Bryan W. Cook at (203) 665 3718.
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IN 92-02 January 3,1992
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Page 1 of 1 LIST OF RECENTLY ISSUED NRC INFORMATION NOTICES Information Date of Notice No.
Subject Issuance Issued to 92-01 Cable Damage Caused by 01/03/92 All holders of OLs or cps Inadequate Cable Installa-for nuclear power reactors tion Procedures and Controls 91-87 Hydrogen Embrittlement of 12/27/91 All holders of OLs or cps Raychem Cryofit Couplings for nuclear power reactors 91-86 New Reporting Requirements 12/:7/91 All licensees authorized for Contamination Events at Medical facilities to use byproduct materials for human use.
S1-85 Potential Failures of 12/26/91 All bolders of OLs or cps Thermostatic Control Valves for nuclear power reactors for Diesel Generator Jacket Cooling Water s1-84 Problems with Criticality 12/26/91 All Nuclear Regulatory Alarm Components / Systems Comission (NRC) fuel 1
cycle licensees, interim spent fuel storage licens-ees, and critical mass licensees.
91-83 Solenoid-Operated Valve 12/20/91 All holders of OLs or cps Failures Resulted in TurbineOverspeed for nuclear power reactors 4
91-18, High-Energy Piping Failures 12/18/91 All holders of OLs or cps Supp. 1 Caused by Wall Thinning for nuclear power reactors 91-82 Problems with Diaphragms 12/18/91 All holders of OLs or cps in Safety-Related Tanks for nuclear power reactors 91-81 Switchyard Problems that 12/16/91 All holders of OLs or cps Contribute to Loss of for nuclear power reactors Offsite Power
= Operating License
= Construction Permit W
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