SAFETY SERtES No. 50-SG-D5 (Rev. 1) This publication is no longer valid Please see http://www-ns.iaea.org/standards/ Externa) Man-in in Reiation to Nuciear Power Piant Design YTEFAS GUiDES A Safety Guide A PUBUCAHON W!TH!NTHE NUSS PROGRAMME !NTERNAT)ONAL ATOMtC ENERGY AGENCY, VtENNA, 1996 This publication is no longer valid Please see http://www-ns.iaea.org/standards/ CATEGORIES IN THE IAEA SAFETY SERIES /j new /H'erarc/Hca/ cafegon'xafM??! scheme /MS ^?een :nfroJMceJ, accorA'ng fo wA;'cA fAe /?M^/:caf;'ons /w fAe M E4 ^q/efy ^er/es are grouped as yb//ows; Safety Fundamentais (silver cover) Basic objectives, concepts and principles to ensure safety. Safety Standards (red cover) Basic requirements which must be satisfied to ensure safety for particular activities or application areas. Safety Guides (green cover) Recommendations, on the basis of international experience, relating to the ful­ filment of basic requirements. Safety Practices (blue cover) Practical examples and detailed methods which can be used for the application of Safety Standards or Safety Guides. Safety Fundamentals and Safety Standards are issued with the approval of the IAEA Board of Governors; Safety Guides and Safety Practices are issued under the authority of the Director General of the IAEA. There are other publications of the IAEA which also contain information important to safety, in particular in the Proceedings Series (papers presented at symposia and conferences), the Technical Reports Series (emphasis on technological aspects) and the IAEA-TECDOC Series (information usually in a preliminary form). This publication is no longer valid Please see http://www-ns.iaea.org/standards/ EXTERNAL MAN-INDUCED EVENTS IN RELATION TO NUCLEAR POWER PLANT DESIGN A Safety Guide This publication is no longer valid Please see http://www-ns.iaea.org/standards/ This publication is no longer valid Please see http://www-ns.iaea.org/standards/ CORRIGENDA to External Man-induced Events in Reiation to Nuciear Power Piant Design Safety Series No. 50-SG-D5 (Rev. 1) p. 1 The definition of Normal Operation should read as follows: "Operation of a nuclear power plant within specified operational limits and condi­ tions including shutdown, power operation, shutting down, starting up, maintenance, testing and refuelling." The definition of Anticipated Operationai Occurrences should read as follows: "All operational processes deviating from normal operation which are expected to occur once or several times during the operating life of the nuclear power plant and which, in view of appropriate design provisions, do not cause any significant damage to items important to safety nor lead to accident conditions." p. 2 The definition of Design Basis Accidents should read as follows: "Accident conditions against which the nuclear power plant is designed according to established design criteria." The definition of Severe Accidents should read as follows: "Nuclear power plant states beyond accident conditions, including those causing significant core degradation." p. 4 Replace "Design Basis Externai Events" with "Design Basis for Externai E vents". p. 3 The definition on this page of Norma! Operation should be deleted, p. 7 The definition of Scabbing should read as follows: "The ejection of irregular pieces of that face of the target opposite the face of missile impact.'' The definition of SpaMing should read as follows: "The ejection of target material from the face of missile impact." 1 This publication is no longer valid Please see http://www-ns.iaea.org/standards/ p. 11, para. Ill, line 3 Replace "impulsive loads" by "impulse loads". p. 18, para. 225 Replace the first sentence by: "For light water cooled reactors of the types now commonly in use, the following typical structures, systems and components, together with their foundations and sup­ ports, as listed below, should be protected from the effects of DBEMIEs that affect the entire site or a wide area of the site." p. 19, para. 225 Item (8) should read as follows: "Those portions of the radwaste treatment system whose failure due to DBEMIE effects could result in a potential off-site radiological consequence if prescribed limits are exceeded." p. 20, para. 227 The last sentence should read: "However, the overall structure should be checked against reaction loads from the individual elements or substructures, and its response is generally required to remain broadly within the linear domain, using normal code limits for extreme or abnormal loads." p. 25, para. 311, line 1 Replace "impulse forces" by "impulsive loads", p. 25, para. 312, item (3) The last sentence should read: "These dynamic effects can be analytically expressed by their response spectra at the corresponding locations of the components." p. 38, para. 608 The last sentence should read: "These assumptions are conservative with regard to estimates of gas concentration but not for estimates of filtering of incoming air, prevention of ingress of air during the critical time period by use of recirculation air systems or for determining the amount of bottled air supplies for self-contained breathing apparatus." p. 40, para. 612, line 3 Replace "The leakage" with "To assume leakage". p. 47, para. 1-5. Delete "General Dynamics". 2 This publication is no longer valid Please see http://www-ns.iaea.org/standards/ p. 47, para. 1-6. Replace "two genera! aviation commercial aircraft" with "two civil aircraft". p. 49, para. 11-3. This should commence as follows: "11-3. Furthermore, it has been recommended [28] that lesser standoff distances as given by W 1/3 Rip = 3.65 where is the static capacity of structural walls (in bar or Pa X 10^)" p. 50, para. 11-4. This should read: "The standoff distances recommended in Refs [18, 23] are intended for use with explosions of solid substances with TNT equivalents in excess of 18 t. Such quantities of explosives produce positive pressure durations of a sufficient length of time that variation in the total incident positive impulse of the pressure-time history has little influence on the structural response as a function of frequency. For explosions with substantially lower TNT equivalent yields, the response is primarily influenced by the total positive impulse, and the standoff distances recommended in Refs [18, 23] become excessively conservative, as shown in Ref. [28]." 3 This publication is no longer valid Please see http://www-ns.iaea.org/standards/ Postulated initiating events Postulated plant (on the basis of NUSS 50-SG-S5) 1 conditions 2 Development of probable scenarios and list of items that require <— ] protection. 3 " 1 Design parameters 4 A no Would there be damage to items <3— important to safety? 5 ^y es no Are these items needed to meet < !- requirements of Para. 201? 6 ^y es no Would the damage be sufficient to <3- affect necessary safety functions? 7 ^y es Modify the design to ensure safety by capability of systems, diversity, choice of plant layout, barriers, etc. 8 A —> No further action required 9 Equipment necessary to perform the required safety functions after the occurrence of a DBMtE, shat) be functionally qualified to the induced environmental conditions, inctuding vibrational loadings. F/G. 7. Logic Vagram /or o/ evenM ow i'wporrawf ?o 4 This publication is no longer valid Please see http://www-ns.iaea.org/standards/ 1 23456789 Time (ms) F/G. 2. LoaJ-fMne /MMcfton ca/cn/afeJ /or secondary (eng/we of a 7%anM?n /!F-4F a:rcra^. 7bM/ maw = 7. 7 impact ve/oc/fy = 700 wA, i^pacf area = 0.7&5 (<%< = 7 /M). /4 d a p ^ /row /?e/! /6/. Time (ms) F/G. 3. /<7ea/;ze^ /oa^-Hwe /or a PAa^M/n RF-4F a:rcra/?. 7o;a/ = 20 f, ifnpacf w/oc/fy 27f mA, ;wpacf area = 7/n^ (<^< = 2.96 w). /4^apfe<7 /row /?e/: /20/. Time (ms) F/G. 4. Loa^-Ufne ca/cM/afe^ /or a Boe/ng B-720 a!rcra/f w;7/: an Mnpacf ve/oc;'fy of 700 mA. /!<7ap!eJ /row /79/. 5 This publication is no longer valid Please see http://www-ns.iaea.org/standards/ F/G. 9. Drawee venM.s 77V7* egm'va/enf WMM /or a ^Mc/ear power p/an; JeM'gne<? aga:'m( a pea/: pemf/ve /ytciWen^ ove^pre^Mre o/ 7 ZrPa. /rom /?e/! /2^/. This publication is no longer valid Please see http://www-ns.iaea.org/standards/ Time (ms) F/G. J. yMncn'on ca/cM/a;^ ^br a Boeing B-707-320 a/rcra/f w;'fA a foM/ /?MM of 97 f an^7 an in%?ac; ve/odfy o f 700 fn/s. ^4<7ap;eJ yrom Re/! /7 9 / impact area 4 m 10 20 30 40 m^ 1 . - L ^ J4 .6 m Nose section ___ 21.3 m___ Wing main spar section (outer wing fracture begins) -21.3 m- Wing rear spar section (outer wing fracture begins) F/G. 6. 7mpacf area ca/cM/afe^ a^ a ^wcn'on o/n'we ybr a Boe/ng 707-320 at'rcra^. ^4<7ap;e<7 yrom 7?ef /79/. Time (ms) F7G. 7. 7<7ea/i'ze<7 /oa^-nme ca/cM/afe^ /or a Lea^cf 23 aw<7 a CeMwa 270 a/rcra^ an Mnpacf ve/oci'ry of 700 mA. ,4<%apte<f /rom 7!ef /70/. 6 This publication is no longer valid Please see http://www-ns.iaea.org/standards/ The following States are Members of the International Atomic Energy Agency: AFGHANISTAN HUNGARY PERU ALBANIA ICELAND PHILIPPINES ALGERIA INDIA POLAND ARGENTINA INDONESIA PORTUGAL ARMENIA IRAN, QATAR AUSTRALIA ISLAMIC REPUBLIC OF ROMANIA AUSTRIA IRAQ RUSSIAN FEDERATION BANGLADESH IRELAND SAUDI ARABIA BELARUS ISRAEL SENEGAL BELGIUM ITALY SIERRA LEONE BOLIVIA JAMAICA SINGAPORE BOSNIA AND JAPAN SLOVAKIA HERZEGOVINA JORDAN SLOVENIA BRAZIL KAZAKHSTAN SOUTH AFRICA BULGARIA KENYA SPAIN CAMBODIA KOREA, REPUBLIC OF SRI LANKA CAMEROON KUWAIT SUDAN CANADA LEBANON SWEDEN CHILE LIBERIA SWITZERLAND CHINA LIBYAN ARAB JAMAHIRIYA SYRIAN ARAB REPUBLIC COLOMBIA LIECHTENSTEIN THAILAND COSTA RICA LITHUANIA THE FORMER YUGOSLAV COTE D'IVOIRE