ML20050R760
| ML20050R760 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 04/12/1982 |
| From: | Schiffgens J Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20050N853 | List: |
| References | |
| RTR-REGGD-01.115, RTR-REGGD-1.115 ISSUANCES-OL, NUDOCS 8204140499 | |
| Download: ML20050R760 (7) | |
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1 UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION i
i BEFORE THE ATOMIC SAFETY AND LICENSING BOARD I
iffI't)1 L In,the Matter of LONG ISLAND LIGHTING COMPANY Docket Nos. 50-322 l
(OL)
(ShorehamNuclearPowerStation, Unit 1) i a
NRC STAFF TESTIMONY OF JOHN 0. SCHIFFGENS CN REG. GUIDE 1.115:
TURBINE ORIENTATION 4
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(SOC Contention 19(j))
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1 OUTLINE OF TESTIMONY This testimony addresses S0C Contention 19(j) regarding Regulatory Guide 1.115 and turbine missiles.
The NRC Staff in the Shoreham Safety Evaluation Report (SER) calculated a probability of 1.2 x 10-7 for low trajectory turbine i
missile damage for the Shoreham design. Given the conservative assumptions used in this calculation, the Staff has concluded that this l
probability is acceptably low to satisfy General Design Criterion 4.
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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of LONG ISLAND LIGHTING COMPANY Docket Nos. 50-322
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(0L)
(Shoreham Nuclear Power. Station,
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Unit 1)
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NRC STAFF TESTIMONY OF JOHN 0. SCHIFFGENS ON S0C CONTENTION 19(j)
Q.
State your name and position with the NRC.
A.
My name is John 0. Schiffgens.
I am a Materials Engineer assigned to the Materials Engineering Branch, Division of Engineering of the U.S. Nuclear Regulatory Commission.
Q.
Have you prepared a statement of professional qualifications?
A.
Yes. A copy of my professional qualifications is attached to this testimony (see Attachment 1).
Q.
What is the purpose of this testimony?
A.
The purpose of this testimony is to address S0C Contention 19(j).
Q.
What is S0C Contention 19(j)?
A.
SOC Contention 19(j) states:
The turbine orientation with respect to safety-related structures is unfavorable in the Shoreham design and thus results in additional probability of a turbine missile accident endangering public health and safety. LILC0's design for protection against low-trajectory
turbine missiles, as described in Section 10.2.3 of the FSAR, is not in conformance with the latest procedures outlined in Revision 1 of Regulatory Guide 1.115 and therefore does not comply with 10 C.F.R. Part 50, Appendix A, Criterion 4.
Q.
What is the NRC Staff's position with respect to the Shoreham design for protection against low trajectory turbine missiles?
A.
The turbine missile analysis presented by LILC0 in Section 10.2.3 of the FSAR was reviewed by the NRC Staff. The Staff i
evaluation of the turbine missile risk for Shoreham is presented in Section 3.5.3 of the'SER. The Staff reviewer, based upon independent calculations, determined the probability of unacceptable damage due to low trajectory turbine missiles to be 1.2 x 10-7 per year.
The Staff concluded:
Our review of turbine missile protection has determined that the overall probability that turbine missiles could damage the plant and lead to consequences in excess of 10 C.F.R. Part 100 exposure guidelines is acceptably low. The plant essential systems are considered to be protected I
against potential turbine missile damage and meet the applicable requirements of General Design Criterion 4.
Q.
Would the Staff's calculation of a probability of 1.2 x 10-7 per year for low trajectory turbine missiles meet the acceptable risk rate specified in the current revision of Reg. Guide 1.115?
A.
Reg. Guide 1.115, Rev. 1, presents a criterion which 'is a conservative way to ensure a hazard rate due to low-trajectory turbine missiles that is acceptably low.
The Reg. Guide sets 10-7 per year as the acceptable probability of riamage.
The Reg. Guide probability is based upon realistic probability calculations in which no conservative assumptions are used.
If con-servative assumptions are used, overall probabilities greater than l
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l 10-7 but less than 10-6 are permitted without exceeding the applicable requirements of General Design Criterion 4 The Staff conservatively assumed in its calculation for the l
Shoreham design that all missiles ejected with elevation angles in the range between 43" and 57 striking the reactor building will perforate the building wall, be deflected, and remain inside the containment.
Therefore, the resulting probability of 1.2 x 10-7, which is only slightly larger than 10-7, is acceptably low and meets the requirements of General Design Criterion 4 for low trajectory turbine missiles.
Q.
What is your conclusion?
A.
The Staff position has been stated in the SER. The Shoreham essential systems are considered to be adequately protected against potential turbine missile damage. This meets the applicable requirements of General Design Criterion 4.
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ATTACHiiENT 1 PROFESSIONAL QUALIFICATIONS OF JOHN 0. SCHIFFGENS June 30,1980 Materials. Engineer to Materials Engineering Branch Date Division of Engineering Knowledgeable and experienced 'in materials and other related engi'neering aspects of nuclear reactors.
Serves as a qualified materials engineer in the Materials Engineering Branch, Division of Engineering.
Responsible for reviews, analyses, and evaluation of safety issues related to structural and mechanical components of reactor facilities licensed
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for power operation.
Participates as a technical reviewer in evalusting applications for construction permits and operating licenses for power and non-power reactors and operational and design modifications of DOE-and D0D-owned operating facilities exempt from the licensing process.
Specific assignments include review of operating license applications for compliance with General Design Criteria 4 according to Regulatory Guide 1.115, " Protection Against Low Trajectory Turbine Missiles," and Standard Review Plan Sections 3.5.1.3, " Turbine Missile's," and 2.2.3,
" Evaluation of Potential Accidents."
Education:
Bachelor of Arts, Philosophy, Saint Vincent College Bachelor of Science, Metallurgical Engineering, University of Notre Dame flaster of Science, Nuclear Engineering, Pennsylvania State University Doctor of Philosophy, Solid State Science, Pennsylvania State University Experience prior to joining NRC August 1967 Assistant Professor, to Nuclear Engineering Department June 1974 Purdue University Taught various graduate and underpraduate courses in the Nuclear Engineering curriculum, did research in the area of irradiation effects on metals, and supervised graduate student research.
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- Engineer, to Irradiation Analysis Section June 1980 Hanford Engineering Development Laboratory Did research on the theoretical analysis of irradiation effects on metals and alloys; worked primarily in the area of computer simulation of
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irradiation induced atomic displacements in metals.
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