Review of TDR Chapter 11 “ Safety ” - PowerPoint PPT Presentation

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Review of TDR Chapter 11 “ Safety ”

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  1. Review of TDR Chapter 11“Safety” • F. Plewinski • with thanks to • C. Darve, O. Kirstein, R. Linander, A. Nordt

  2. FINDINGS - 1 • This chapter covers SAFETY including: • General principles • Nuclear safety • Conventional facilities • Accelerator • Target Station • Instruments • Integrated Control System • The chapter is 11 pages long which is very short to cover all safety aspects. • It does not address the ESS licensing process. • It is a very general abstract of major licensing documents: GSO, PSAR, EIA etc… TDR Internal Review, Lund, October 2012

  3. COMMENTS - General • General quality is very high for this chapter • A lot of detailed comments and questions were added by all reviewers, in documents already transmitted to the chapter Editor • A detailed summary was also transmitted and discussed prior to this review • In this version 2, English was adjusted by the final corrector, some nuances were lost (or added) which raised questions from the reviewers… TDR Internal Review, Lund, October 2012

  4. COMMENTS - 1 • 1. Does the chapter meet the requirements of the TDR Mission Statement? •  Yes, globally • 3. Is the content relevant to supporting the decision to proceed to construction? • Yes • PSAR and other docs shall be explicitly mentioned as “reference documents” concerning safety • To avoid the TDR is interpreted (by SSM) as containing formal commitments TDR Internal Review, Lund, October 2012

  5. COMMENTS - 2 • Does the chapter adequately cover the entire area of its topic? • This chapter is quite complete. • “keywords” are missing: • “Design Standards” and “Safety standards” • Radiation protection and Dosimetry • Emergency procedure and Training • Communication, Guidelines and methodology • 4. Is the content of the chapter properly balanced in length and in the depth of detail? • No • Conventional safety part shall be reinforced • Sweden has a regulation: use it! • Be prudent when adopting foreign “codes” which could not be compliant with Swedish regulation TDR Internal Review, Lund, October 2012

  6. COMMENTS - 3 • 5. Does the chapter adequately address interfaces to other related systems described in other chapters? • Some interfaces are maybe not completely addressed: • external stakeholders: Safety Authorities and Environmental authorities should be mentioned • Instrument scientist on access conditions to samples • 6. Are there duplications or inconsistencies within the chapter, and/or between related chapters? • No duplication in this chapter • There are certainly duplications with other TDR chapters • No time for reviewers to cross check them all • There are inconsistencies with other TDR chapters TDR Internal Review, Lund, October 2012

  7. COMMENTS – Inconsistencies • Too many inconsistencies were found in the TDR (where it was explored by the reviewers) • About ESS systems: • ICS, especially PPS and TSS • Confinement barriers (for TS and Exp. Halls) • ESS system naming convention • In definitions: • Barriers and physical barriers • Passive systems and Active systems • This is a major issue all along the TDR v2 TDR Internal Review, Lund, October 2012

  8. COMMENTS – 5 • 7. Does the chapter adequately address all phases of the ESS life cycle? • Yes - See detailed comments • Safety systems are defined independently from the life cycle perspective, which creates a risk of over-specifying them • (e.g. Cooling circuits) • 8. Are risks and potential risks properly addressed and handled? • Yes – see detailed comments TDR Internal Review, Lund, October 2012

  9. COMMENTS – 6 • 9. Are there some especially positive features that should be promoted and strengthened for the construction phase, and which would improve the TDR if emphasized more? • ESS safety, even in case of very unlikely accidental scenario, is entirely based on passive systems • ESS safety “philosophy” is simple and robust • Operational experience gained from other facilities (SNS, JSNS) • 10. Are there any critical remaining issues that you would like to address? • A collective dose (1 man.Sv) is proposed and could be a constraint for middle term operation TDR Internal Review, Lund, October 2012

  10. RECOMMENDATIONS • Corrected English versions SHALL NOT modify the nuances • Make sure the PSAR supersedes the TDR • We shall not over specify safety • Equilibrate the document (ToC) in favour of Conventional Safety: • Add more references to standards and regulatory texts concerning Conventional Safety • Be prudent when adopting foreign “codes” which could not be compliant with Swedish regulation • Track and resolve inconsistencies: • Set up dedicated groups to read through full TDR with a restricted point of view in mind (e.g. by searching keywords) • Use existing Standards for main Vocabulary definitions TDR Internal Review, Lund, October 2012